./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/memset_override_0_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/memset_override_0_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 5db0d3c47797ff0a215821e8d5fa38ab9190be93d125d3ffd24136b371560f6c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:26:26,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:26:26,484 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:26:26,554 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:26:26,555 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:26:26,561 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:26:26,563 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:26:26,568 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:26:26,571 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:26:26,578 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:26:26,579 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:26:26,581 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:26:26,582 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:26:26,585 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:26:26,588 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:26:26,593 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:26:26,595 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:26:26,597 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:26:26,606 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:26:26,613 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:26:26,619 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:26:26,621 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:26:26,625 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:26:26,626 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:26:26,639 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:26:26,640 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:26:26,641 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:26:26,643 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:26:26,644 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:26:26,646 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:26:26,646 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:26:26,648 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:26:26,650 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:26:26,652 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:26:26,654 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:26:26,654 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:26:26,655 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:26:26,656 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:26:26,656 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:26:26,657 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:26:26,658 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:26:26,659 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 02:26:26,708 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:26:26,709 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:26:26,710 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:26:26,710 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:26:26,717 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:26:26,718 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:26:26,718 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:26:26,718 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:26:26,719 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:26:26,719 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:26:26,720 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:26:26,720 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:26:26,720 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:26:26,721 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:26:26,721 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:26:26,721 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:26:26,721 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:26:26,722 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:26:26,722 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:26:26,723 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:26:26,723 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:26:26,723 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:26:26,723 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:26:26,724 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:26:26,724 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:26:26,724 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:26:26,726 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:26:26,726 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:26:26,726 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:26:26,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:26:26,727 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:26:26,727 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:26:26,728 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:26:26,728 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:26:26,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:26:26,728 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:26:26,729 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:26:26,729 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:26:26,729 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_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5db0d3c47797ff0a215821e8d5fa38ab9190be93d125d3ffd24136b371560f6c [2021-11-23 02:26:27,060 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:26:27,085 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:26:27,088 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:26:27,090 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:26:27,091 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:26:27,092 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/aws-c-common/memset_override_0_harness.i [2021-11-23 02:26:27,174 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/data/ac2d3e268/eac1494e200140869013f75726da1670/FLAG7787c614c [2021-11-23 02:26:28,123 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:26:28,125 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/sv-benchmarks/c/aws-c-common/memset_override_0_harness.i [2021-11-23 02:26:28,171 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/data/ac2d3e268/eac1494e200140869013f75726da1670/FLAG7787c614c [2021-11-23 02:26:28,613 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/data/ac2d3e268/eac1494e200140869013f75726da1670 [2021-11-23 02:26:28,615 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:26:28,617 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:26:28,619 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:26:28,619 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:26:28,624 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:26:28,626 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:26:28" (1/1) ... [2021-11-23 02:26:28,629 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76486ac7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:28, skipping insertion in model container [2021-11-23 02:26:28,629 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:26:28" (1/1) ... [2021-11-23 02:26:28,637 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:26:28,769 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:26:29,034 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_e3422295-ed9f-4124-862a-b1df2ad0dc0c/sv-benchmarks/c/aws-c-common/memset_override_0_harness.i[4491,4504] [2021-11-23 02:26:29,040 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_e3422295-ed9f-4124-862a-b1df2ad0dc0c/sv-benchmarks/c/aws-c-common/memset_override_0_harness.i[4551,4564] [2021-11-23 02:26:29,921 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:29,922 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:29,923 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:29,924 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:29,925 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:29,942 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:29,943 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:29,946 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:29,947 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:29,950 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:29,951 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:29,952 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:29,953 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:30,184 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-23 02:26:30,189 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-23 02:26:30,191 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-23 02:26:30,194 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-23 02:26:30,197 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-23 02:26:30,198 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-23 02:26:30,204 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-23 02:26:30,207 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-23 02:26:30,209 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-23 02:26:30,211 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-23 02:26:30,334 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:26:30,350 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:26:30,384 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_e3422295-ed9f-4124-862a-b1df2ad0dc0c/sv-benchmarks/c/aws-c-common/memset_override_0_harness.i[4491,4504] [2021-11-23 02:26:30,396 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_e3422295-ed9f-4124-862a-b1df2ad0dc0c/sv-benchmarks/c/aws-c-common/memset_override_0_harness.i[4551,4564] [2021-11-23 02:26:30,487 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:30,488 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:30,488 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:30,489 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:30,490 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:30,503 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:30,506 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:30,507 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:30,510 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:30,512 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:30,514 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:30,516 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:30,517 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:30,557 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-23 02:26:30,558 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-23 02:26:30,559 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-23 02:26:30,561 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-23 02:26:30,562 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-23 02:26:30,563 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-23 02:26:30,564 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-23 02:26:30,564 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-23 02:26:30,566 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-23 02:26:30,567 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-23 02:26:30,601 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:26:30,887 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:26:30,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:30 WrapperNode [2021-11-23 02:26:30,888 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:26:30,889 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:26:30,890 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:26:30,890 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:26:30,899 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:30" (1/1) ... [2021-11-23 02:26:30,974 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:30" (1/1) ... [2021-11-23 02:26:31,032 INFO L137 Inliner]: procedures = 592, calls = 609, calls flagged for inlining = 38, calls inlined = 6, statements flattened = 85 [2021-11-23 02:26:31,033 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:26:31,042 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:26:31,042 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:26:31,043 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:26:31,053 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:30" (1/1) ... [2021-11-23 02:26:31,054 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:30" (1/1) ... [2021-11-23 02:26:31,074 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:30" (1/1) ... [2021-11-23 02:26:31,076 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:30" (1/1) ... [2021-11-23 02:26:31,088 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:30" (1/1) ... [2021-11-23 02:26:31,109 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:30" (1/1) ... [2021-11-23 02:26:31,119 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:30" (1/1) ... [2021-11-23 02:26:31,124 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:26:31,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:26:31,138 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:26:31,138 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:26:31,140 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:30" (1/1) ... [2021-11-23 02:26:31,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:26:31,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:26:31,184 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:26:31,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:26:31,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:26:31,244 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:26:31,246 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-23 02:26:31,246 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-23 02:26:31,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:26:31,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:26:31,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:26:31,247 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 02:26:31,247 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 02:26:31,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:26:31,248 INFO L130 BoogieDeclarations]: Found specification of procedure assert_all_bytes_are [2021-11-23 02:26:31,248 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_all_bytes_are [2021-11-23 02:26:31,249 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-23 02:26:31,249 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-23 02:26:31,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:26:31,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:26:31,521 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:26:31,523 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:26:31,804 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:26:31,855 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:26:31,856 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 02:26:31,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:26:31 BoogieIcfgContainer [2021-11-23 02:26:31,859 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:26:31,861 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:26:31,861 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:26:31,869 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:26:31,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:26:28" (1/3) ... [2021-11-23 02:26:31,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54f78a7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:26:31, skipping insertion in model container [2021-11-23 02:26:31,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:30" (2/3) ... [2021-11-23 02:26:31,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54f78a7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:26:31, skipping insertion in model container [2021-11-23 02:26:31,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:26:31" (3/3) ... [2021-11-23 02:26:31,875 INFO L111 eAbstractionObserver]: Analyzing ICFG memset_override_0_harness.i [2021-11-23 02:26:31,881 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:26:31,881 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:26:31,937 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:26:31,947 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:26:31,947 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:26:31,969 INFO L276 IsEmpty]: Start isEmpty. Operand has 48 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-23 02:26:31,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 02:26:31,976 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:26:31,976 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:26:31,977 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:26:31,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:26:31,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1342933705, now seen corresponding path program 1 times [2021-11-23 02:26:31,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:26:31,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786905236] [2021-11-23 02:26:31,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:26:31,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:26:32,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:26:32,779 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 02:26:32,779 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:26:32,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786905236] [2021-11-23 02:26:32,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786905236] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:26:32,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508857680] [2021-11-23 02:26:32,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:26:32,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:26:32,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:26:32,789 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:26:32,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:26:32,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:26:32,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 02:26:32,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:26:33,613 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 02:26:33,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:26:34,118 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 02:26:34,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508857680] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:26:34,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2129765815] [2021-11-23 02:26:34,170 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-23 02:26:34,178 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:26:34,184 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:26:34,192 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:26:34,192 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:26:34,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:26:34,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:26:34,372 INFO L354 Elim1Store]: treesize reduction 83, result has 33.6 percent of original size [2021-11-23 02:26:34,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 64 [2021-11-23 02:26:34,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:26:34,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:26:34,564 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-23 02:26:34,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 14 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 49 treesize of output 85 [2021-11-23 02:26:35,552 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2021-11-23 02:26:35,582 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 10 for LOIs [2021-11-23 02:26:35,588 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:26:37,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [2129765815] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:26:37,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:26:37,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [7, 7, 8] total 23 [2021-11-23 02:26:37,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926122413] [2021-11-23 02:26:37,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:26:37,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 02:26:37,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:26:37,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 02:26:37,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-11-23 02:26:37,360 INFO L87 Difference]: Start difference. First operand has 48 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 13 states, 9 states have (on average 1.0) internal successors, (9), 8 states have internal predecessors, (9), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-23 02:26:37,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:26:37,866 INFO L93 Difference]: Finished difference Result 127 states and 173 transitions. [2021-11-23 02:26:37,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 02:26:37,869 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 1.0) internal successors, (9), 8 states have internal predecessors, (9), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 24 [2021-11-23 02:26:37,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:26:37,880 INFO L225 Difference]: With dead ends: 127 [2021-11-23 02:26:37,880 INFO L226 Difference]: Without dead ends: 81 [2021-11-23 02:26:37,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 49 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-11-23 02:26:37,889 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 87 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:26:37,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 307 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 140 Invalid, 0 Unknown, 122 Unchecked, 0.4s Time] [2021-11-23 02:26:37,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-23 02:26:37,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2021-11-23 02:26:37,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 47 states have internal predecessors, (53), 26 states have call successors, (26), 9 states have call predecessors, (26), 7 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-23 02:26:37,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 101 transitions. [2021-11-23 02:26:37,958 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 101 transitions. Word has length 24 [2021-11-23 02:26:37,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:26:37,959 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 101 transitions. [2021-11-23 02:26:37,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 1.0) internal successors, (9), 8 states have internal predecessors, (9), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-23 02:26:37,959 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 101 transitions. [2021-11-23 02:26:37,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 02:26:37,962 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:26:37,962 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:26:38,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:26:38,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:26:38,186 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:26:38,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:26:38,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1152670264, now seen corresponding path program 1 times [2021-11-23 02:26:38,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:26:38,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238519351] [2021-11-23 02:26:38,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:26:38,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:26:38,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:26:38,362 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 02:26:38,362 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:26:38,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238519351] [2021-11-23 02:26:38,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238519351] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:26:38,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:26:38,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:26:38,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141287730] [2021-11-23 02:26:38,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:26:38,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:26:38,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:26:38,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:26:38,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:26:38,366 INFO L87 Difference]: Start difference. First operand 79 states and 101 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 02:26:38,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:26:38,418 INFO L93 Difference]: Finished difference Result 114 states and 145 transitions. [2021-11-23 02:26:38,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:26:38,419 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 25 [2021-11-23 02:26:38,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:26:38,421 INFO L225 Difference]: With dead ends: 114 [2021-11-23 02:26:38,421 INFO L226 Difference]: Without dead ends: 80 [2021-11-23 02:26:38,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:26:38,424 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 0 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:26:38,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 95 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:26:38,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-23 02:26:38,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-11-23 02:26:38,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 46 states have (on average 1.173913043478261) internal successors, (54), 48 states have internal predecessors, (54), 26 states have call successors, (26), 9 states have call predecessors, (26), 7 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-23 02:26:38,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 102 transitions. [2021-11-23 02:26:38,451 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 102 transitions. Word has length 25 [2021-11-23 02:26:38,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:26:38,452 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 102 transitions. [2021-11-23 02:26:38,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 02:26:38,452 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 102 transitions. [2021-11-23 02:26:38,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 02:26:38,454 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:26:38,454 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:26:38,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:26:38,455 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:26:38,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:26:38,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1319363776, now seen corresponding path program 1 times [2021-11-23 02:26:38,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:26:38,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097716599] [2021-11-23 02:26:38,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:26:38,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:26:38,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:26:38,798 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-23 02:26:38,799 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:26:38,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097716599] [2021-11-23 02:26:38,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097716599] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:26:38,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571822489] [2021-11-23 02:26:38,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:26:38,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:26:38,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:26:38,806 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:26:38,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:26:38,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:26:38,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 02:26:38,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:26:39,266 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 02:26:39,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:26:39,616 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-23 02:26:39,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571822489] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:26:39,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1435908057] [2021-11-23 02:26:39,624 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-23 02:26:39,624 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:26:39,625 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:26:39,627 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:26:39,631 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:26:39,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:26:39,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:26:39,774 INFO L354 Elim1Store]: treesize reduction 83, result has 33.6 percent of original size [2021-11-23 02:26:39,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 64 [2021-11-23 02:26:39,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:26:39,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:26:39,951 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-23 02:26:39,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 14 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 49 treesize of output 85 [2021-11-23 02:26:40,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 1 [2021-11-23 02:26:40,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 1 [2021-11-23 02:26:40,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2021-11-23 02:26:40,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 1 [2021-11-23 02:26:40,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 1 [2021-11-23 02:26:40,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 1 [2021-11-23 02:26:40,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:26:40,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 301 treesize of output 300 [2021-11-23 02:26:40,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 1 [2021-11-23 02:26:40,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 1 [2021-11-23 02:26:40,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2021-11-23 02:26:40,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 1 [2021-11-23 02:26:40,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 1 [2021-11-23 02:26:41,111 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2021-11-23 02:26:41,146 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 10 for LOIs [2021-11-23 02:26:41,148 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:26:42,999 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '975#(and (<= 0 |#NULL.base|) (= (mod __VERIFIER_assert_~cond 256) 0) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (exists ((|v_ULTIMATE.start_memset_override_0_impl_~c#1_BEFORE_CALL_13| Int)) (and (<= |v_ULTIMATE.start_memset_override_0_impl_~c#1_BEFORE_CALL_13| 2147483647) (<= 0 (+ |v_ULTIMATE.start_memset_override_0_impl_~c#1_BEFORE_CALL_13| 2147483648)) (= (ite (= (ite (= |v_ULTIMATE.start_memset_override_0_impl_~c#1_BEFORE_CALL_13| 0) 1 0) 0) 0 1) |__VERIFIER_assert_#in~cond|))) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-23 02:26:42,999 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:26:43,000 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:26:43,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 7] total 14 [2021-11-23 02:26:43,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100900979] [2021-11-23 02:26:43,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:26:43,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 02:26:43,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:26:43,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 02:26:43,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-11-23 02:26:43,003 INFO L87 Difference]: Start difference. First operand 80 states and 102 transitions. Second operand has 14 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 12 states have internal predecessors, (20), 6 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-23 02:26:43,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:26:43,271 INFO L93 Difference]: Finished difference Result 87 states and 108 transitions. [2021-11-23 02:26:43,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 02:26:43,272 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 12 states have internal predecessors, (20), 6 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 6 states have call successors, (9) Word has length 26 [2021-11-23 02:26:43,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:26:43,281 INFO L225 Difference]: With dead ends: 87 [2021-11-23 02:26:43,282 INFO L226 Difference]: Without dead ends: 85 [2021-11-23 02:26:43,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 51 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-11-23 02:26:43,287 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 55 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:26:43,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 231 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:26:43,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-23 02:26:43,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2021-11-23 02:26:43,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 49 states have (on average 1.163265306122449) internal successors, (57), 51 states have internal predecessors, (57), 26 states have call successors, (26), 10 states have call predecessors, (26), 8 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-23 02:26:43,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2021-11-23 02:26:43,337 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 26 [2021-11-23 02:26:43,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:26:43,337 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2021-11-23 02:26:43,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 12 states have internal predecessors, (20), 6 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-23 02:26:43,340 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2021-11-23 02:26:43,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 02:26:43,342 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:26:43,342 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:26:43,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:26:43,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:26:43,564 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:26:43,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:26:43,565 INFO L85 PathProgramCache]: Analyzing trace with hash -16112764, now seen corresponding path program 1 times [2021-11-23 02:26:43,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:26:43,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730237662] [2021-11-23 02:26:43,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:26:43,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:26:43,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 02:26:43,678 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 02:26:43,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 02:26:43,843 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-23 02:26:43,844 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-23 02:26:43,846 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 02:26:43,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:26:43,852 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2021-11-23 02:26:43,856 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 02:26:43,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 02:26:43 BoogieIcfgContainer [2021-11-23 02:26:43,918 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 02:26:43,919 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 02:26:43,919 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 02:26:43,920 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 02:26:43,920 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:26:31" (3/4) ... [2021-11-23 02:26:43,924 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-23 02:26:43,924 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 02:26:43,925 INFO L158 Benchmark]: Toolchain (without parser) took 15307.73ms. Allocated memory was 90.2MB in the beginning and 195.0MB in the end (delta: 104.9MB). Free memory was 49.6MB in the beginning and 126.8MB in the end (delta: -77.2MB). Peak memory consumption was 25.7MB. Max. memory is 16.1GB. [2021-11-23 02:26:43,925 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 90.2MB. Free memory was 62.6MB in the beginning and 62.5MB in the end (delta: 27.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:26:43,926 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2269.57ms. Allocated memory was 90.2MB in the beginning and 121.6MB in the end (delta: 31.5MB). Free memory was 49.4MB in the beginning and 82.7MB in the end (delta: -33.3MB). Peak memory consumption was 42.7MB. Max. memory is 16.1GB. [2021-11-23 02:26:43,927 INFO L158 Benchmark]: Boogie Procedure Inliner took 151.71ms. Allocated memory is still 121.6MB. Free memory was 82.7MB in the beginning and 78.6MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-23 02:26:43,927 INFO L158 Benchmark]: Boogie Preprocessor took 95.16ms. Allocated memory is still 121.6MB. Free memory was 78.6MB in the beginning and 76.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 02:26:43,927 INFO L158 Benchmark]: RCFGBuilder took 721.17ms. Allocated memory is still 121.6MB. Free memory was 76.4MB in the beginning and 57.6MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2021-11-23 02:26:43,928 INFO L158 Benchmark]: TraceAbstraction took 12057.32ms. Allocated memory was 121.6MB in the beginning and 195.0MB in the end (delta: 73.4MB). Free memory was 57.6MB in the beginning and 126.8MB in the end (delta: -69.2MB). Peak memory consumption was 4.0MB. Max. memory is 16.1GB. [2021-11-23 02:26:43,929 INFO L158 Benchmark]: Witness Printer took 5.08ms. Allocated memory is still 195.0MB. Free memory is still 126.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:26:43,936 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 90.2MB. Free memory was 62.6MB in the beginning and 62.5MB in the end (delta: 27.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2269.57ms. Allocated memory was 90.2MB in the beginning and 121.6MB in the end (delta: 31.5MB). Free memory was 49.4MB in the beginning and 82.7MB in the end (delta: -33.3MB). Peak memory consumption was 42.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 151.71ms. Allocated memory is still 121.6MB. Free memory was 82.7MB in the beginning and 78.6MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 95.16ms. Allocated memory is still 121.6MB. Free memory was 78.6MB in the beginning and 76.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 721.17ms. Allocated memory is still 121.6MB. Free memory was 76.4MB in the beginning and 57.6MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 12057.32ms. Allocated memory was 121.6MB in the beginning and 195.0MB in the end (delta: 73.4MB). Free memory was 57.6MB in the beginning and 126.8MB in the end (delta: -69.2MB). Peak memory consumption was 4.0MB. Max. memory is 16.1GB. * Witness Printer took 5.08ms. Allocated memory is still 195.0MB. Free memory is still 126.8MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 223]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseAnd at line 5885. Possible FailurePath: [L5919] CALL memset_override_0_harness() [L5906] short d1[160]; [L5907] short d2[160]; [L5908] int c = __VERIFIER_nondet_int(); [L5909] CALL assume_abort_if_not(c == 0) VAL [\old(cond)=1] [L211] COND FALSE !(!cond) [L5909] RET assume_abort_if_not(c == 0) VAL [c=0, d1={6:0}, d2={5:0}] [L5911] unsigned size = __VERIFIER_nondet_uint(); [L5912] CALL assume_abort_if_not((size & 0x7) == 0) VAL [\old(cond)=1] [L211] COND FALSE !(!cond) [L5912] RET assume_abort_if_not((size & 0x7) == 0) VAL [c=0, d1={6:0}, d2={5:0}, size=0] [L5913] CALL assume_abort_if_not(size < 160) VAL [\old(cond)=1] [L211] COND FALSE !(!cond) [L5913] RET assume_abort_if_not(size < 160) VAL [c=0, d1={6:0}, d2={5:0}, size=0] [L5914] CALL memset_impl(d1, c, size) [L5870] CALL assume_abort_if_not((((n) == 0) || (s))) VAL [\old(cond)=1] [L211] COND FALSE !(!cond) [L5870] RET assume_abort_if_not((((n) == 0) || (s))) VAL [c=0, n=0, s={6:0}] [L5871] COND FALSE !(n > 0) VAL [c=0, n=0, s={6:0}] [L5876] return s; [L5914] RET memset_impl(d1, c, size) [L5915] CALL memset_override_0_impl(d2, c, size) [L5881] CALL assume_abort_if_not((((n) == 0) || (dst))) VAL [\old(cond)=1] [L211] COND FALSE !(!cond) [L5881] RET assume_abort_if_not((((n) == 0) || (dst))) VAL [c=0, dst={5:0}, n=0] [L5883] CALL __VERIFIER_assert(c == 0) VAL [\old(cond)=1] [L223] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L5883] RET __VERIFIER_assert(c == 0) VAL [c=0, dst={5:0}, n=0] [L5884] size_t num_uint64s = n >> 3; [L5885] size_t rem = n & 0x7; VAL [c=0, dst={5:0}, n=0, num_uint64s=0] [L5886] CALL __VERIFIER_assert(rem == 0) VAL [\old(cond)=0] [L223] COND TRUE !cond VAL [\old(cond)=0, cond=0] [L223] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 48 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 11.9s, OverallIterations: 4, TraceHistogramMax: 5, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 155 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 142 mSDsluCounter, 633 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 122 IncrementalHoareTripleChecker+Unchecked, 542 mSDsCounter, 67 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 288 IncrementalHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 67 mSolverCounterUnsat, 157 mSDtfsCounter, 288 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 166 GetRequests, 102 SyntacticMatches, 13 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 4.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=84occurred in iteration=3, InterpolantAutomatonStates: 26, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 155 NumberOfCodeBlocks, 155 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 168 ConstructedInterpolants, 0 QuantifiedInterpolants, 692 SizeOfPredicates, 26 NumberOfNonLiveVariables, 280 ConjunctsInSsa, 43 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 119/143 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 1.4s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 3, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 20, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 9, TOOLS_POST_TIME: 0.4s, TOOLS_POST_CALL_APPLICATIONS: 16, TOOLS_POST_CALL_TIME: 0.6s, TOOLS_POST_RETURN_APPLICATIONS: 10, TOOLS_POST_RETURN_TIME: 0.1s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 35, TOOLS_QUANTIFIERELIM_TIME: 1.1s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.3s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 45, FLUID_YES_ANSWERS: 4, DOMAIN_JOIN_APPLICATIONS: 16, DOMAIN_JOIN_TIME: 0.2s, DOMAIN_ALPHA_APPLICATIONS: 4, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 20, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 10, CALL_SUMMARIZER_CACHE_MISSES: 1, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 215, DAG_COMPRESSION_RETAINED_NODES: 55, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-23 02:26:43,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/memset_override_0_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 5db0d3c47797ff0a215821e8d5fa38ab9190be93d125d3ffd24136b371560f6c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:26:46,912 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:26:46,916 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:26:46,967 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:26:46,968 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:26:46,973 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:26:46,977 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:26:46,983 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:26:46,987 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:26:47,000 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:26:47,002 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:26:47,004 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:26:47,006 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:26:47,009 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:26:47,011 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:26:47,015 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:26:47,017 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:26:47,018 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:26:47,026 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:26:47,028 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:26:47,035 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:26:47,037 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:26:47,040 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:26:47,043 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:26:47,052 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:26:47,057 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:26:47,058 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:26:47,059 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:26:47,061 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:26:47,062 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:26:47,063 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:26:47,064 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:26:47,067 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:26:47,068 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:26:47,070 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:26:47,070 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:26:47,072 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:26:47,072 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:26:47,072 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:26:47,075 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:26:47,076 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:26:47,082 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-23 02:26:47,126 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:26:47,126 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:26:47,127 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:26:47,127 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:26:47,128 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:26:47,128 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:26:47,129 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:26:47,129 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:26:47,129 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:26:47,130 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:26:47,130 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:26:47,130 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:26:47,131 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:26:47,131 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:26:47,132 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:26:47,132 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:26:47,132 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:26:47,133 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 02:26:47,133 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 02:26:47,133 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 02:26:47,133 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:26:47,134 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:26:47,134 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:26:47,134 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:26:47,135 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 02:26:47,135 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:26:47,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:26:47,136 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:26:47,136 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:26:47,136 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:26:47,136 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 02:26:47,137 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 02:26:47,137 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:26:47,137 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:26:47,138 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:26:47,138 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_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5db0d3c47797ff0a215821e8d5fa38ab9190be93d125d3ffd24136b371560f6c [2021-11-23 02:26:47,615 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:26:47,641 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:26:47,644 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:26:47,645 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:26:47,646 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:26:47,648 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/aws-c-common/memset_override_0_harness.i [2021-11-23 02:26:47,723 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/data/9ec1ff1c1/0f179f1a046f43c1ac454d15a162cd38/FLAGfb46d0c7f [2021-11-23 02:26:48,746 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:26:48,747 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/sv-benchmarks/c/aws-c-common/memset_override_0_harness.i [2021-11-23 02:26:48,792 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/data/9ec1ff1c1/0f179f1a046f43c1ac454d15a162cd38/FLAGfb46d0c7f [2021-11-23 02:26:49,221 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/data/9ec1ff1c1/0f179f1a046f43c1ac454d15a162cd38 [2021-11-23 02:26:49,224 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:26:49,226 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:26:49,229 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:26:49,230 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:26:49,234 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:26:49,235 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:26:49" (1/1) ... [2021-11-23 02:26:49,237 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@753756ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:49, skipping insertion in model container [2021-11-23 02:26:49,237 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:26:49" (1/1) ... [2021-11-23 02:26:49,246 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:26:49,363 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:26:49,744 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_e3422295-ed9f-4124-862a-b1df2ad0dc0c/sv-benchmarks/c/aws-c-common/memset_override_0_harness.i[4491,4504] [2021-11-23 02:26:49,762 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_e3422295-ed9f-4124-862a-b1df2ad0dc0c/sv-benchmarks/c/aws-c-common/memset_override_0_harness.i[4551,4564] [2021-11-23 02:26:50,686 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:50,687 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:50,688 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:50,689 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:50,691 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:50,715 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:50,727 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:50,730 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:50,735 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:50,739 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:50,746 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:50,748 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:50,750 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:50,965 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-23 02:26:50,967 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-23 02:26:50,968 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-23 02:26:50,970 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-23 02:26:50,972 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-23 02:26:50,973 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-23 02:26:50,974 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-23 02:26:50,976 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-23 02:26:50,977 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-23 02:26:50,978 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-23 02:26:51,142 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:26:51,164 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-23 02:26:51,250 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:26:51,255 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_e3422295-ed9f-4124-862a-b1df2ad0dc0c/sv-benchmarks/c/aws-c-common/memset_override_0_harness.i[4491,4504] [2021-11-23 02:26:51,256 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_e3422295-ed9f-4124-862a-b1df2ad0dc0c/sv-benchmarks/c/aws-c-common/memset_override_0_harness.i[4551,4564] [2021-11-23 02:26:51,353 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:51,353 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:51,354 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:51,354 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:51,356 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:51,367 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:51,368 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:51,370 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:51,371 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:51,372 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:51,374 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:51,374 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:51,375 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:51,400 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-23 02:26:51,401 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-23 02:26:51,402 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-23 02:26:51,404 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-23 02:26:51,405 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-23 02:26:51,406 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-23 02:26:51,407 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-23 02:26:51,408 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-23 02:26:51,409 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-23 02:26:51,409 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-23 02:26:51,436 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:26:51,443 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:26:51,460 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_e3422295-ed9f-4124-862a-b1df2ad0dc0c/sv-benchmarks/c/aws-c-common/memset_override_0_harness.i[4491,4504] [2021-11-23 02:26:51,461 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_e3422295-ed9f-4124-862a-b1df2ad0dc0c/sv-benchmarks/c/aws-c-common/memset_override_0_harness.i[4551,4564] [2021-11-23 02:26:51,560 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:51,561 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:51,563 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:51,564 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:51,565 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:51,582 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:51,583 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:51,586 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:51,588 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:51,589 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:51,590 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:51,591 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:51,592 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:26:51,632 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-23 02:26:51,634 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-23 02:26:51,638 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-23 02:26:51,640 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-23 02:26:51,641 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-23 02:26:51,642 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-23 02:26:51,644 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-23 02:26:51,645 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-23 02:26:51,647 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-23 02:26:51,648 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-23 02:26:51,689 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:26:51,903 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:26:51,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:51 WrapperNode [2021-11-23 02:26:51,904 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:26:51,905 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:26:51,906 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:26:51,906 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:26:51,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:51" (1/1) ... [2021-11-23 02:26:52,002 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:51" (1/1) ... [2021-11-23 02:26:52,069 INFO L137 Inliner]: procedures = 611, calls = 609, calls flagged for inlining = 38, calls inlined = 6, statements flattened = 85 [2021-11-23 02:26:52,070 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:26:52,071 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:26:52,071 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:26:52,071 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:26:52,083 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:51" (1/1) ... [2021-11-23 02:26:52,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:51" (1/1) ... [2021-11-23 02:26:52,103 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:51" (1/1) ... [2021-11-23 02:26:52,103 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:51" (1/1) ... [2021-11-23 02:26:52,134 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:51" (1/1) ... [2021-11-23 02:26:52,154 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:51" (1/1) ... [2021-11-23 02:26:52,159 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:51" (1/1) ... [2021-11-23 02:26:52,179 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:26:52,181 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:26:52,181 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:26:52,181 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:26:52,182 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:51" (1/1) ... [2021-11-23 02:26:52,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:26:52,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:26:52,231 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:26:52,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:26:52,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:26:52,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 02:26:52,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-23 02:26:52,293 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-23 02:26:52,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:26:52,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:26:52,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:26:52,294 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-23 02:26:52,294 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 02:26:52,296 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 02:26:52,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:26:52,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-23 02:26:52,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-23 02:26:52,297 INFO L130 BoogieDeclarations]: Found specification of procedure assert_all_bytes_are [2021-11-23 02:26:52,297 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_all_bytes_are [2021-11-23 02:26:52,297 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-23 02:26:52,298 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-23 02:26:52,616 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:26:52,618 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:26:53,012 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:26:53,021 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:26:53,021 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 02:26:53,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:26:53 BoogieIcfgContainer [2021-11-23 02:26:53,024 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:26:53,026 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:26:53,026 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:26:53,029 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:26:53,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:26:49" (1/3) ... [2021-11-23 02:26:53,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f0505de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:26:53, skipping insertion in model container [2021-11-23 02:26:53,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:51" (2/3) ... [2021-11-23 02:26:53,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f0505de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:26:53, skipping insertion in model container [2021-11-23 02:26:53,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:26:53" (3/3) ... [2021-11-23 02:26:53,033 INFO L111 eAbstractionObserver]: Analyzing ICFG memset_override_0_harness.i [2021-11-23 02:26:53,040 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:26:53,040 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:26:53,126 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:26:53,138 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:26:53,141 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:26:53,166 INFO L276 IsEmpty]: Start isEmpty. Operand has 60 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 40 states have internal predecessors, (49), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-23 02:26:53,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-23 02:26:53,174 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:26:53,175 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:26:53,175 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:26:53,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:26:53,184 INFO L85 PathProgramCache]: Analyzing trace with hash 16590849, now seen corresponding path program 1 times [2021-11-23 02:26:53,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:26:53,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [387619661] [2021-11-23 02:26:53,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:26:53,213 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:26:53,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:26:53,217 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:26:53,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 02:26:53,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:26:53,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 02:26:53,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:26:53,676 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-23 02:26:53,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:26:53,852 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-23 02:26:53,853 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:26:53,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [387619661] [2021-11-23 02:26:53,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [387619661] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:26:53,858 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:26:53,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-23 02:26:53,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380929073] [2021-11-23 02:26:53,862 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:26:53,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 02:26:53,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:26:53,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 02:26:53,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 02:26:53,906 INFO L87 Difference]: Start difference. First operand has 60 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 40 states have internal predecessors, (49), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-23 02:26:53,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:26:53,945 INFO L93 Difference]: Finished difference Result 117 states and 167 transitions. [2021-11-23 02:26:53,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 02:26:53,948 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 36 [2021-11-23 02:26:53,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:26:53,959 INFO L225 Difference]: With dead ends: 117 [2021-11-23 02:26:53,960 INFO L226 Difference]: Without dead ends: 52 [2021-11-23 02:26:53,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 02:26:53,969 INFO L933 BasicCegarLoop]: 75 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, 75 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:26:53,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:26:53,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-23 02:26:54,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-11-23 02:26:54,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 34 states have internal predecessors, (38), 15 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-23 02:26:54,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2021-11-23 02:26:54,022 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 36 [2021-11-23 02:26:54,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:26:54,023 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2021-11-23 02:26:54,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-23 02:26:54,024 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2021-11-23 02:26:54,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-23 02:26:54,027 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:26:54,027 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:26:54,049 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-23 02:26:54,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:26:54,251 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:26:54,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:26:54,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1271235587, now seen corresponding path program 1 times [2021-11-23 02:26:54,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:26:54,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [535135058] [2021-11-23 02:26:54,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:26:54,258 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:26:54,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:26:54,259 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:26:54,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 02:26:54,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:26:54,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 02:26:54,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:26:54,629 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 02:26:54,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:26:54,848 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 02:26:54,848 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:26:54,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [535135058] [2021-11-23 02:26:54,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [535135058] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:26:54,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1845918404] [2021-11-23 02:26:54,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:26:54,850 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:26:54,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:26:54,861 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:26:54,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-23 02:26:55,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:26:55,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:26:55,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:26:55,334 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 02:26:55,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:26:55,504 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 02:26:55,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1845918404] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:26:55,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447739225] [2021-11-23 02:26:55,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:26:55,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:26:55,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:26:55,511 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:26:55,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:26:55,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:26:55,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:26:55,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:26:55,771 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 02:26:55,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:26:56,046 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 02:26:56,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447739225] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:26:56,047 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:26:56,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 9] total 12 [2021-11-23 02:26:56,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210309335] [2021-11-23 02:26:56,049 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:26:56,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 02:26:56,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:26:56,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 02:26:56,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:26:56,055 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-23 02:26:56,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:26:56,398 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2021-11-23 02:26:56,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:26:56,399 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 36 [2021-11-23 02:26:56,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:26:56,401 INFO L225 Difference]: With dead ends: 58 [2021-11-23 02:26:56,401 INFO L226 Difference]: Without dead ends: 56 [2021-11-23 02:26:56,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-11-23 02:26:56,403 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 46 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:26:56,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 429 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:26:56,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-23 02:26:56,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-11-23 02:26:56,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 37 states have internal predecessors, (41), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-23 02:26:56,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2021-11-23 02:26:56,418 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 36 [2021-11-23 02:26:56,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:26:56,420 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2021-11-23 02:26:56,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-23 02:26:56,421 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2021-11-23 02:26:56,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-23 02:26:56,423 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:26:56,423 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:26:56,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:26:56,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:26:56,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:26:57,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:26:57,041 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:26:57,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:26:57,041 INFO L85 PathProgramCache]: Analyzing trace with hash 2010040638, now seen corresponding path program 1 times [2021-11-23 02:26:57,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:26:57,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1613123999] [2021-11-23 02:26:57,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:26:57,043 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:26:57,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:26:57,045 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:26:57,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 02:26:57,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:26:57,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:26:57,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:26:57,608 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 02:26:57,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:26:58,036 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 02:26:58,037 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:26:58,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1613123999] [2021-11-23 02:26:58,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1613123999] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:26:58,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [618160482] [2021-11-23 02:26:58,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:26:58,038 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:26:58,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:26:58,042 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:26:58,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-23 02:26:58,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:26:58,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:26:58,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:26:58,762 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-23 02:26:58,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:26:58,956 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-23 02:26:58,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [618160482] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:26:58,956 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:26:58,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [9, 9] total 18 [2021-11-23 02:26:58,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130913556] [2021-11-23 02:26:58,957 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:26:58,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 02:26:58,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:26:58,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 02:26:58,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-11-23 02:26:58,961 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 6 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-23 02:26:59,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:26:59,389 INFO L93 Difference]: Finished difference Result 83 states and 104 transitions. [2021-11-23 02:26:59,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 02:26:59,390 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 6 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 42 [2021-11-23 02:26:59,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:26:59,393 INFO L225 Difference]: With dead ends: 83 [2021-11-23 02:26:59,395 INFO L226 Difference]: Without dead ends: 81 [2021-11-23 02:26:59,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 145 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-11-23 02:26:59,398 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 42 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:26:59,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 742 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 109 Invalid, 0 Unknown, 6 Unchecked, 0.3s Time] [2021-11-23 02:26:59,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-23 02:26:59,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 66. [2021-11-23 02:26:59,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.119047619047619) internal successors, (47), 44 states have internal predecessors, (47), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-23 02:26:59,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2021-11-23 02:26:59,433 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 42 [2021-11-23 02:26:59,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:26:59,433 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2021-11-23 02:26:59,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 6 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-23 02:26:59,436 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2021-11-23 02:26:59,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-23 02:26:59,440 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:26:59,441 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:26:59,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:26:59,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:26:59,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:26:59,858 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:26:59,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:26:59,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1722148702, now seen corresponding path program 1 times [2021-11-23 02:26:59,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:26:59,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1764344243] [2021-11-23 02:26:59,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:26:59,859 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:26:59,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:26:59,861 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:26:59,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 02:26:59,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:26:59,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:26:59,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:27:00,371 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 02:27:00,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:27:00,759 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 02:27:00,759 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:27:00,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1764344243] [2021-11-23 02:27:00,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1764344243] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:27:00,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [130594335] [2021-11-23 02:27:00,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:00,760 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:27:00,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:27:00,762 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:27:00,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-23 02:27:00,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:00,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:27:00,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:27:01,046 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 02:27:01,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:27:01,189 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-23 02:27:01,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [130594335] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:27:01,189 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:27:01,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [9, 9] total 16 [2021-11-23 02:27:01,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560130701] [2021-11-23 02:27:01,191 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:27:01,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:27:01,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:27:01,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:27:01,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-11-23 02:27:01,194 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:27:01,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:01,238 INFO L93 Difference]: Finished difference Result 113 states and 136 transitions. [2021-11-23 02:27:01,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:27:01,240 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 43 [2021-11-23 02:27:01,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:01,243 INFO L225 Difference]: With dead ends: 113 [2021-11-23 02:27:01,244 INFO L226 Difference]: Without dead ends: 68 [2021-11-23 02:27:01,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-11-23 02:27:01,246 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 2 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:01,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 124 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:27:01,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-23 02:27:01,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-11-23 02:27:01,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 45 states have internal predecessors, (48), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-23 02:27:01,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 82 transitions. [2021-11-23 02:27:01,261 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 82 transitions. Word has length 43 [2021-11-23 02:27:01,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:01,262 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 82 transitions. [2021-11-23 02:27:01,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:27:01,262 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 82 transitions. [2021-11-23 02:27:01,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-23 02:27:01,264 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:01,264 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-23 02:27:01,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:27:01,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-23 02:27:01,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:27:01,689 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:01,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:01,690 INFO L85 PathProgramCache]: Analyzing trace with hash 982661572, now seen corresponding path program 1 times [2021-11-23 02:27:01,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:27:01,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1894296003] [2021-11-23 02:27:01,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:01,691 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:27:01,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:27:01,698 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:27:01,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 02:27:01,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:01,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:27:01,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:27:02,239 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-23 02:27:02,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:27:02,594 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-23 02:27:02,595 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:27:02,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1894296003] [2021-11-23 02:27:02,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1894296003] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:27:02,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [80398964] [2021-11-23 02:27:02,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:02,595 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:27:02,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:27:02,597 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:27:02,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-23 02:27:02,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:02,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 02:27:02,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:27:03,475 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-23 02:27:03,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:27:03,962 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 02:27:03,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [80398964] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:27:03,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593456813] [2021-11-23 02:27:03,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:03,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:27:03,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:27:03,964 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:27:03,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 02:27:04,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:04,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:27:04,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:27:04,484 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-23 02:27:04,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:27:04,950 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 02:27:04,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593456813] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:27:04,951 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:27:04,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 9, 9] total 23 [2021-11-23 02:27:04,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479013846] [2021-11-23 02:27:04,951 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:27:04,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-23 02:27:04,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:27:04,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-23 02:27:04,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-11-23 02:27:04,954 INFO L87 Difference]: Start difference. First operand 67 states and 82 transitions. Second operand has 23 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 10 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-11-23 02:27:05,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:05,744 INFO L93 Difference]: Finished difference Result 120 states and 144 transitions. [2021-11-23 02:27:05,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 02:27:05,744 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 10 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) Word has length 45 [2021-11-23 02:27:05,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:05,746 INFO L225 Difference]: With dead ends: 120 [2021-11-23 02:27:05,746 INFO L226 Difference]: Without dead ends: 75 [2021-11-23 02:27:05,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 242 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-11-23 02:27:05,749 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 16 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:05,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 821 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 139 Invalid, 0 Unknown, 40 Unchecked, 0.2s Time] [2021-11-23 02:27:05,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-23 02:27:05,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 65. [2021-11-23 02:27:05,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 45 states have internal predecessors, (49), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-23 02:27:05,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2021-11-23 02:27:05,766 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 45 [2021-11-23 02:27:05,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:05,767 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2021-11-23 02:27:05,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 10 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-11-23 02:27:05,768 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2021-11-23 02:27:05,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-23 02:27:05,769 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:05,769 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:27:05,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 02:27:05,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 02:27:06,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-23 02:27:06,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:27:06,386 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:06,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:06,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1110629482, now seen corresponding path program 1 times [2021-11-23 02:27:06,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:27:06,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1389838383] [2021-11-23 02:27:06,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:06,387 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:27:06,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:27:06,388 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:27:06,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 02:27:06,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:06,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:27:06,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:27:06,768 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-23 02:27:06,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:27:07,011 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-23 02:27:07,011 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:27:07,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1389838383] [2021-11-23 02:27:07,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1389838383] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:27:07,011 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:27:07,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-23 02:27:07,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250153201] [2021-11-23 02:27:07,012 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:27:07,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:27:07,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:27:07,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:27:07,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:27:07,013 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-23 02:27:07,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:07,182 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2021-11-23 02:27:07,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:27:07,183 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 51 [2021-11-23 02:27:07,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:07,184 INFO L225 Difference]: With dead ends: 71 [2021-11-23 02:27:07,185 INFO L226 Difference]: Without dead ends: 69 [2021-11-23 02:27:07,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:27:07,186 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 25 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:07,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 309 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:27:07,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-23 02:27:07,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-11-23 02:27:07,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 48 states have internal predecessors, (52), 15 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-23 02:27:07,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2021-11-23 02:27:07,201 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 51 [2021-11-23 02:27:07,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:07,202 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2021-11-23 02:27:07,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-23 02:27:07,203 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2021-11-23 02:27:07,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-23 02:27:07,204 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:07,205 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:27:07,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 02:27:07,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:27:07,414 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:07,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:07,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1132287315, now seen corresponding path program 1 times [2021-11-23 02:27:07,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:27:07,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [371978900] [2021-11-23 02:27:07,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:07,416 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:27:07,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:27:07,417 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:27:07,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 02:27:07,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:07,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:27:07,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:27:07,916 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-23 02:27:07,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:27:08,168 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-23 02:27:08,168 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:27:08,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [371978900] [2021-11-23 02:27:08,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [371978900] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:27:08,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:27:08,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2021-11-23 02:27:08,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295581470] [2021-11-23 02:27:08,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:27:08,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:27:08,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:27:08,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:27:08,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:27:08,171 INFO L87 Difference]: Start difference. First operand 69 states and 80 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-23 02:27:08,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:08,311 INFO L93 Difference]: Finished difference Result 112 states and 131 transitions. [2021-11-23 02:27:08,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:27:08,312 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 68 [2021-11-23 02:27:08,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:08,314 INFO L225 Difference]: With dead ends: 112 [2021-11-23 02:27:08,314 INFO L226 Difference]: Without dead ends: 84 [2021-11-23 02:27:08,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:27:08,316 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 31 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:08,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 191 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:27:08,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-23 02:27:08,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2021-11-23 02:27:08,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 57 states have internal predecessors, (62), 19 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-23 02:27:08,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 98 transitions. [2021-11-23 02:27:08,346 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 98 transitions. Word has length 68 [2021-11-23 02:27:08,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:08,347 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 98 transitions. [2021-11-23 02:27:08,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-23 02:27:08,348 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 98 transitions. [2021-11-23 02:27:08,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-23 02:27:08,350 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:08,350 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:27:08,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 02:27:08,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:27:08,567 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:08,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:08,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1383518092, now seen corresponding path program 1 times [2021-11-23 02:27:08,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:27:08,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [447416505] [2021-11-23 02:27:08,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:08,568 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:27:08,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:27:08,569 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:27:08,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 02:27:08,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:08,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:27:08,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:27:09,142 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-23 02:27:09,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:27:09,434 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-23 02:27:09,434 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:27:09,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [447416505] [2021-11-23 02:27:09,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [447416505] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:27:09,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:27:09,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 13 [2021-11-23 02:27:09,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504133244] [2021-11-23 02:27:09,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:27:09,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:27:09,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:27:09,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:27:09,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-23 02:27:09,437 INFO L87 Difference]: Start difference. First operand 82 states and 98 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 4 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-23 02:27:09,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:09,595 INFO L93 Difference]: Finished difference Result 104 states and 119 transitions. [2021-11-23 02:27:09,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:27:09,596 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 4 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 72 [2021-11-23 02:27:09,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:09,597 INFO L225 Difference]: With dead ends: 104 [2021-11-23 02:27:09,597 INFO L226 Difference]: Without dead ends: 69 [2021-11-23 02:27:09,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-11-23 02:27:09,599 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 25 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:09,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 315 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:27:09,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-23 02:27:09,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-11-23 02:27:09,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 48 states have internal predecessors, (51), 15 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-23 02:27:09,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2021-11-23 02:27:09,613 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 72 [2021-11-23 02:27:09,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:09,613 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2021-11-23 02:27:09,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 4 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-23 02:27:09,614 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2021-11-23 02:27:09,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-23 02:27:09,616 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:09,616 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:27:09,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 02:27:09,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:27:09,834 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:09,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:09,834 INFO L85 PathProgramCache]: Analyzing trace with hash 511671837, now seen corresponding path program 1 times [2021-11-23 02:27:09,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:27:09,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [36221233] [2021-11-23 02:27:09,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:09,835 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:27:09,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:27:09,836 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:27:09,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 02:27:09,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:10,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 02:27:10,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:27:10,701 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 38 proven. 15 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-23 02:27:10,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:27:11,482 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-23 02:27:11,482 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:27:11,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [36221233] [2021-11-23 02:27:11,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [36221233] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:27:11,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [669820075] [2021-11-23 02:27:11,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:11,483 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:27:11,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:27:11,484 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:27:11,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-23 02:27:11,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:11,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:27:11,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:27:12,581 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 35 proven. 15 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-23 02:27:12,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:27:13,279 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-23 02:27:13,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [669820075] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:27:13,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601539680] [2021-11-23 02:27:13,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:13,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:27:13,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:27:13,285 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:27:13,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 02:27:13,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:13,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 02:27:13,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:27:14,285 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 35 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-23 02:27:14,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:27:14,964 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-23 02:27:14,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601539680] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:27:14,965 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:27:14,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 11, 10, 10] total 39 [2021-11-23 02:27:14,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087541928] [2021-11-23 02:27:14,966 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:27:14,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-23 02:27:14,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:27:14,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-23 02:27:14,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1280, Unknown=0, NotChecked=0, Total=1482 [2021-11-23 02:27:14,969 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 34 states have internal predecessors, (88), 16 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (34), 17 states have call predecessors, (34), 16 states have call successors, (34) [2021-11-23 02:27:17,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:17,181 INFO L93 Difference]: Finished difference Result 131 states and 151 transitions. [2021-11-23 02:27:17,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-23 02:27:17,184 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 34 states have internal predecessors, (88), 16 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (34), 17 states have call predecessors, (34), 16 states have call successors, (34) Word has length 75 [2021-11-23 02:27:17,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:17,185 INFO L225 Difference]: With dead ends: 131 [2021-11-23 02:27:17,185 INFO L226 Difference]: Without dead ends: 78 [2021-11-23 02:27:17,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 410 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=438, Invalid=2318, Unknown=0, NotChecked=0, Total=2756 [2021-11-23 02:27:17,188 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 15 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:17,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 942 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 168 Invalid, 0 Unknown, 24 Unchecked, 0.5s Time] [2021-11-23 02:27:17,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-23 02:27:17,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-11-23 02:27:17,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 57 states have internal predecessors, (60), 15 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-23 02:27:17,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2021-11-23 02:27:17,202 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 75 [2021-11-23 02:27:17,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:17,202 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2021-11-23 02:27:17,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 34 states have internal predecessors, (88), 16 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (34), 17 states have call predecessors, (34), 16 states have call successors, (34) [2021-11-23 02:27:17,203 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2021-11-23 02:27:17,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-23 02:27:17,205 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:17,205 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:27:17,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-23 02:27:17,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-23 02:27:17,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 02:27:17,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:27:17,820 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:17,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:17,820 INFO L85 PathProgramCache]: Analyzing trace with hash -2075883641, now seen corresponding path program 1 times [2021-11-23 02:27:17,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:27:17,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [853484232] [2021-11-23 02:27:17,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:17,821 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:27:17,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:27:17,824 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:27:17,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 02:27:18,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:18,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 02:27:18,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:27:19,228 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 38 proven. 55 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-23 02:27:19,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:27:20,727 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 9 proven. 61 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-23 02:27:20,727 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:27:20,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [853484232] [2021-11-23 02:27:20,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [853484232] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:27:20,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [351523542] [2021-11-23 02:27:20,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:20,728 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:27:20,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:27:20,729 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:27:20,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-23 02:27:21,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:21,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 02:27:21,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:27:22,273 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 33 proven. 49 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-23 02:27:22,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:27:25,093 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-23 02:27:25,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [351523542] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:27:25,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431438972] [2021-11-23 02:27:25,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:25,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:27:25,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:27:25,105 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:27:25,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-23 02:27:25,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:25,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 02:27:25,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:27:26,642 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 38 proven. 55 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-23 02:27:26,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:27:32,541 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-23 02:27:32,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431438972] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:27:32,542 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:27:32,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14, 14, 16, 18] total 75 [2021-11-23 02:27:32,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521733921] [2021-11-23 02:27:32,543 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:27:32,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-23 02:27:32,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:27:32,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-23 02:27:32,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=711, Invalid=4839, Unknown=0, NotChecked=0, Total=5550 [2021-11-23 02:27:32,549 INFO L87 Difference]: Start difference. First operand 78 states and 88 transitions. Second operand has 75 states, 74 states have (on average 2.108108108108108) internal successors, (156), 72 states have internal predecessors, (156), 16 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (34), 17 states have call predecessors, (34), 16 states have call successors, (34) [2021-11-23 02:28:01,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:01,143 INFO L93 Difference]: Finished difference Result 196 states and 239 transitions. [2021-11-23 02:28:01,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-23 02:28:01,145 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 2.108108108108108) internal successors, (156), 72 states have internal predecessors, (156), 16 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (34), 17 states have call predecessors, (34), 16 states have call successors, (34) Word has length 85 [2021-11-23 02:28:01,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:01,147 INFO L225 Difference]: With dead ends: 196 [2021-11-23 02:28:01,148 INFO L226 Difference]: Without dead ends: 142 [2021-11-23 02:28:01,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 438 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 3201 ImplicationChecksByTransitivity, 33.3s TimeCoverageRelationStatistics Valid=1488, Invalid=9224, Unknown=0, NotChecked=0, Total=10712 [2021-11-23 02:28:01,153 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 392 mSDsluCounter, 1748 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 1837 SdHoareTripleChecker+Invalid, 1344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:01,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 1837 Invalid, 1344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 1011 Invalid, 0 Unknown, 66 Unchecked, 6.6s Time] [2021-11-23 02:28:01,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-23 02:28:01,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 105. [2021-11-23 02:28:01,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 80 states have (on average 1.15) internal successors, (92), 81 states have internal predecessors, (92), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-23 02:28:01,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 126 transitions. [2021-11-23 02:28:01,177 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 126 transitions. Word has length 85 [2021-11-23 02:28:01,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:01,178 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 126 transitions. [2021-11-23 02:28:01,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 2.108108108108108) internal successors, (156), 72 states have internal predecessors, (156), 16 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (34), 17 states have call predecessors, (34), 16 states have call successors, (34) [2021-11-23 02:28:01,179 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 126 transitions. [2021-11-23 02:28:01,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-23 02:28:01,181 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:01,181 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:28:01,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-23 02:28:01,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-23 02:28:01,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-23 02:28:01,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:28:01,786 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:28:01,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:01,786 INFO L85 PathProgramCache]: Analyzing trace with hash 24387113, now seen corresponding path program 2 times [2021-11-23 02:28:01,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:28:01,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [816704857] [2021-11-23 02:28:01,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:28:01,787 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:28:01,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:28:01,789 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:28:01,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3422295-ed9f-4124-862a-b1df2ad0dc0c/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-23 02:28:02,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 02:28:02,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:28:02,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-23 02:28:02,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:28:02,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-23 02:28:03,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-23 02:28:03,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:03,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 02:28:03,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:03,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:03,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:03,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2021-11-23 02:28:04,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:04,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:04,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:04,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:04,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:04,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:04,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 49 [2021-11-23 02:28:04,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:04,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:04,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:04,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:04,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:04,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:04,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:04,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:04,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:04,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:04,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 61 [2021-11-23 02:28:05,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:05,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:05,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:05,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:05,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:05,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:05,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:05,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:05,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:05,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:05,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:05,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:05,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:05,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:05,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:05,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 75 [2021-11-23 02:28:06,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:06,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:06,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:06,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:06,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:06,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:06,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:06,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:06,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:06,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:06,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:06,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:06,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:06,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:06,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:06,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:06,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:06,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:06,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:06,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:06,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:06,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 89 [2021-11-23 02:28:07,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:07,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:07,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:07,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:07,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:07,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:07,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:07,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:07,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:07,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:07,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:07,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:07,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:07,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:07,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:07,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:07,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:07,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:07,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:07,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:07,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:07,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:07,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:07,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:07,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:07,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:07,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:07,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:07,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 29 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 95 [2021-11-23 02:28:11,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:11,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:28:11,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:28:11,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:28:11,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:28:11,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:28:11,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:28:11,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:28:11,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 57 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 173 [2021-11-23 02:28:20,488 INFO L354 Elim1Store]: treesize reduction 386, result has 1.8 percent of original size [2021-11-23 02:28:20,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 18 select indices, 18 select index equivalence classes, 28 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 153 case distinctions, treesize of input 145 treesize of output 79 [2021-11-23 02:28:20,761 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 35 proven. 89 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-23 02:28:20,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:37:27,383 WARN L227 SmtUtils]: Spent 1.54m on a formula simplification. DAG size of input: 184 DAG size of output: 90 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-23 02:37:27,384 INFO L354 Elim1Store]: treesize reduction 1881, result has 15.0 percent of original size [2021-11-23 02:37:27,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 9 case distinctions, treesize of input 4947303203755 treesize of output 2885715756279