./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl --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 32bit --witnessprinter.graph.data.programhash 72fb41a66cb1f9b8ef6e2c9a867b06ff465ce26afd613e6d36809476f178395e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:17:25,398 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:17:25,400 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:17:25,461 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:17:25,462 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:17:25,467 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:17:25,469 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:17:25,473 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:17:25,476 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:17:25,484 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:17:25,486 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:17:25,488 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:17:25,488 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:17:25,492 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:17:25,495 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:17:25,500 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:17:25,502 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:17:25,503 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:17:25,506 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:17:25,514 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:17:25,517 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:17:25,518 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:17:25,522 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:17:25,523 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:17:25,530 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:17:25,531 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:17:25,531 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:17:25,534 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:17:25,534 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:17:25,536 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:17:25,537 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:17:25,539 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:17:25,541 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:17:25,542 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:17:25,544 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:17:25,544 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:17:25,545 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:17:25,545 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:17:25,546 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:17:25,547 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:17:25,548 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:17:25,548 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:17:25,599 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:17:25,600 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:17:25,600 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:17:25,601 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:17:25,608 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:17:25,609 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:17:25,609 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:17:25,609 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:17:25,609 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:17:25,610 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:17:25,611 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:17:25,611 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:17:25,612 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:17:25,612 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:17:25,612 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:17:25,612 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:17:25,613 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:17:25,613 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:17:25,614 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:17:25,615 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:17:25,615 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:17:25,615 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:17:25,615 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:17:25,616 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:17:25,616 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:17:25,616 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:17:25,618 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:17:25,619 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:17:25,619 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:17:25,619 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:17:25,620 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:17:25,620 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:17:25,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:17:25,621 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:17:25,621 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:17:25,621 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:17:25,621 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:17:25,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:17:25,622 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:17:25,622 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:17:25,622 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:17:25,622 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 72fb41a66cb1f9b8ef6e2c9a867b06ff465ce26afd613e6d36809476f178395e [2021-11-23 17:17:25,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:17:25,922 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:17:25,925 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:17:25,926 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:17:25,927 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:17:25,929 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-23 17:17:26,008 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/data/4b2201835/798cb7073bfc4ace99c4a20a854ca21e/FLAG47105de15 [2021-11-23 17:17:26,826 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:17:26,826 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-23 17:17:26,868 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/data/4b2201835/798cb7073bfc4ace99c4a20a854ca21e/FLAG47105de15 [2021-11-23 17:17:26,906 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/data/4b2201835/798cb7073bfc4ace99c4a20a854ca21e [2021-11-23 17:17:26,909 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:17:26,910 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:17:26,912 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:17:26,912 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:17:26,915 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:17:26,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:17:26" (1/1) ... [2021-11-23 17:17:26,918 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b7cf0b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:26, skipping insertion in model container [2021-11-23 17:17:26,918 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:17:26" (1/1) ... [2021-11-23 17:17:26,927 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:17:27,077 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:17:27,488 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[13533,13546] [2021-11-23 17:17:27,522 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[18033,18046] [2021-11-23 17:17:27,536 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[19325,19338] [2021-11-23 17:17:27,546 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[20083,20096] [2021-11-23 17:17:27,562 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[21703,21716] [2021-11-23 17:17:27,584 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[22461,22474] [2021-11-23 17:17:27,599 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[23547,23560] [2021-11-23 17:17:27,616 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[26086,26099] [2021-11-23 17:17:27,625 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[26847,26860] [2021-11-23 17:17:27,633 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[27936,27949] [2021-11-23 17:17:27,665 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[29941,29954] [2021-11-23 17:17:27,688 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[33864,33877] [2021-11-23 17:17:27,695 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[34625,34638] [2021-11-23 17:17:27,703 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[35718,35731] [2021-11-23 17:17:27,716 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[37727,37740] [2021-11-23 17:17:27,738 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[41330,41343] [2021-11-23 17:17:27,775 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[48207,48220] [2021-11-23 17:17:27,791 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[48968,48981] [2021-11-23 17:17:27,807 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[50057,50070] [2021-11-23 17:17:27,826 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[52062,52075] [2021-11-23 17:17:27,860 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[55451,55464] [2021-11-23 17:17:27,911 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[61148,61161] [2021-11-23 17:17:28,389 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:17:28,404 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:17:28,526 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[13533,13546] [2021-11-23 17:17:28,541 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[18033,18046] [2021-11-23 17:17:28,548 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[19325,19338] [2021-11-23 17:17:28,553 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[20083,20096] [2021-11-23 17:17:28,561 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[21703,21716] [2021-11-23 17:17:28,565 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[22461,22474] [2021-11-23 17:17:28,571 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[23547,23560] [2021-11-23 17:17:28,584 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[26086,26099] [2021-11-23 17:17:28,589 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[26847,26860] [2021-11-23 17:17:28,595 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[27936,27949] [2021-11-23 17:17:28,605 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[29941,29954] [2021-11-23 17:17:28,621 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[33864,33877] [2021-11-23 17:17:28,626 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[34625,34638] [2021-11-23 17:17:28,631 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[35718,35731] [2021-11-23 17:17:28,641 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[37727,37740] [2021-11-23 17:17:28,657 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[41330,41343] [2021-11-23 17:17:28,693 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[48207,48220] [2021-11-23 17:17:28,697 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[48968,48981] [2021-11-23 17:17:28,703 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[50057,50070] [2021-11-23 17:17:28,712 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[52062,52075] [2021-11-23 17:17:28,727 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[55451,55464] [2021-11-23 17:17:28,749 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[61148,61161] [2021-11-23 17:17:29,030 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:17:29,062 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:17:29,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:29 WrapperNode [2021-11-23 17:17:29,063 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:17:29,064 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:17:29,064 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:17:29,065 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:17:29,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:29" (1/1) ... [2021-11-23 17:17:29,134 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:29" (1/1) ... [2021-11-23 17:17:29,292 INFO L137 Inliner]: procedures = 26, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 6324 [2021-11-23 17:17:29,292 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:17:29,293 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:17:29,293 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:17:29,294 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:17:29,302 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:29" (1/1) ... [2021-11-23 17:17:29,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:29" (1/1) ... [2021-11-23 17:17:29,326 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:29" (1/1) ... [2021-11-23 17:17:29,326 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:29" (1/1) ... [2021-11-23 17:17:29,438 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:29" (1/1) ... [2021-11-23 17:17:29,474 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:29" (1/1) ... [2021-11-23 17:17:29,498 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:29" (1/1) ... [2021-11-23 17:17:29,525 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:17:29,527 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:17:29,527 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:17:29,527 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:17:29,531 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:29" (1/1) ... [2021-11-23 17:17:29,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:17:29,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:17:29,561 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:17:29,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:17:29,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:17:29,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:17:29,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:17:29,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:17:29,973 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:17:29,978 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:17:32,899 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:17:32,970 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 17:17:32,975 INFO L158 Benchmark]: Toolchain (without parser) took 6063.99ms. Allocated memory was 132.1MB in the beginning and 348.1MB in the end (delta: 216.0MB). Free memory was 95.6MB in the beginning and 233.9MB in the end (delta: -138.4MB). Peak memory consumption was 134.4MB. Max. memory is 16.1GB. [2021-11-23 17:17:32,976 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 132.1MB. Free memory is still 85.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:17:32,977 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2151.87ms. Allocated memory was 132.1MB in the beginning and 163.6MB in the end (delta: 31.5MB). Free memory was 95.3MB in the beginning and 79.5MB in the end (delta: 15.8MB). Peak memory consumption was 57.4MB. Max. memory is 16.1GB. [2021-11-23 17:17:32,978 INFO L158 Benchmark]: Boogie Procedure Inliner took 227.94ms. Allocated memory is still 163.6MB. Free memory was 79.5MB in the beginning and 108.1MB in the end (delta: -28.6MB). Peak memory consumption was 20.5MB. Max. memory is 16.1GB. [2021-11-23 17:17:32,978 INFO L158 Benchmark]: Boogie Preprocessor took 232.48ms. Allocated memory is still 163.6MB. Free memory was 108.1MB in the beginning and 102.9MB in the end (delta: 5.2MB). Peak memory consumption was 15.1MB. Max. memory is 16.1GB. [2021-11-23 17:17:32,979 INFO L158 Benchmark]: RCFGBuilder took 3446.78ms. Allocated memory was 163.6MB in the beginning and 348.1MB in the end (delta: 184.5MB). Free memory was 102.9MB in the beginning and 233.9MB in the end (delta: -131.0MB). Peak memory consumption was 110.7MB. Max. memory is 16.1GB. [2021-11-23 17:17:32,982 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 132.1MB. Free memory is still 85.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2151.87ms. Allocated memory was 132.1MB in the beginning and 163.6MB in the end (delta: 31.5MB). Free memory was 95.3MB in the beginning and 79.5MB in the end (delta: 15.8MB). Peak memory consumption was 57.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 227.94ms. Allocated memory is still 163.6MB. Free memory was 79.5MB in the beginning and 108.1MB in the end (delta: -28.6MB). Peak memory consumption was 20.5MB. Max. memory is 16.1GB. * Boogie Preprocessor took 232.48ms. Allocated memory is still 163.6MB. Free memory was 108.1MB in the beginning and 102.9MB in the end (delta: 5.2MB). Peak memory consumption was 15.1MB. Max. memory is 16.1GB. * RCFGBuilder took 3446.78ms. Allocated memory was 163.6MB in the beginning and 348.1MB in the end (delta: 184.5MB). Free memory was 102.9MB in the beginning and 233.9MB in the end (delta: -131.0MB). Peak memory consumption was 110.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:17:33,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl --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 32bit --witnessprinter.graph.data.programhash 72fb41a66cb1f9b8ef6e2c9a867b06ff465ce26afd613e6d36809476f178395e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:17:35,553 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:17:35,556 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:17:35,628 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:17:35,629 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:17:35,633 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:17:35,635 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:17:35,640 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:17:35,644 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:17:35,652 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:17:35,654 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:17:35,656 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:17:35,657 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:17:35,660 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:17:35,663 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:17:35,667 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:17:35,670 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:17:35,671 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:17:35,673 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:17:35,682 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:17:35,685 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:17:35,686 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:17:35,689 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:17:35,692 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:17:35,702 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:17:35,703 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:17:35,704 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:17:35,706 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:17:35,707 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:17:35,708 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:17:35,709 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:17:35,710 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:17:35,712 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:17:35,713 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:17:35,715 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:17:35,715 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:17:35,717 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:17:35,717 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:17:35,718 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:17:35,720 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:17:35,721 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:17:35,722 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:17:35,767 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:17:35,767 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:17:35,768 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:17:35,768 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:17:35,769 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:17:35,770 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:17:35,770 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:17:35,770 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:17:35,771 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:17:35,771 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:17:35,772 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:17:35,773 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:17:35,774 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:17:35,775 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:17:35,775 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:17:35,775 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:17:35,776 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:17:35,776 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:17:35,776 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:17:35,776 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:17:35,777 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:17:35,777 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:17:35,777 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:17:35,778 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:17:35,778 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:17:35,778 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:17:35,779 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:17:35,779 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:17:35,779 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:17:35,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:17:35,780 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:17:35,780 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:17:35,781 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:17:35,781 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:17:35,782 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:17:35,782 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:17:35,782 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:17:35,783 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:17:35,783 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 72fb41a66cb1f9b8ef6e2c9a867b06ff465ce26afd613e6d36809476f178395e [2021-11-23 17:17:36,130 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:17:36,153 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:17:36,156 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:17:36,157 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:17:36,158 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:17:36,159 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-23 17:17:36,239 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/data/f59c7ab9d/223bf02cd3b74337817266368beb8b4c/FLAG440992db9 [2021-11-23 17:17:37,093 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:17:37,093 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-23 17:17:37,133 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/data/f59c7ab9d/223bf02cd3b74337817266368beb8b4c/FLAG440992db9 [2021-11-23 17:17:37,170 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/data/f59c7ab9d/223bf02cd3b74337817266368beb8b4c [2021-11-23 17:17:37,175 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:17:37,178 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:17:37,181 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:17:37,181 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:17:37,186 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:17:37,187 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:17:37" (1/1) ... [2021-11-23 17:17:37,190 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f75cdab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:37, skipping insertion in model container [2021-11-23 17:17:37,191 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:17:37" (1/1) ... [2021-11-23 17:17:37,201 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:17:37,435 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:17:37,979 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[13533,13546] [2021-11-23 17:17:38,030 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[18033,18046] [2021-11-23 17:17:38,049 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[19325,19338] [2021-11-23 17:17:38,061 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[20083,20096] [2021-11-23 17:17:38,080 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[21703,21716] [2021-11-23 17:17:38,091 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[22461,22474] [2021-11-23 17:17:38,103 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[23547,23560] [2021-11-23 17:17:38,131 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[26086,26099] [2021-11-23 17:17:38,141 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[26847,26860] [2021-11-23 17:17:38,154 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[27936,27949] [2021-11-23 17:17:38,175 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[29941,29954] [2021-11-23 17:17:38,212 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[33864,33877] [2021-11-23 17:17:38,221 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[34625,34638] [2021-11-23 17:17:38,233 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[35718,35731] [2021-11-23 17:17:38,254 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[37727,37740] [2021-11-23 17:17:38,289 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[41330,41343] [2021-11-23 17:17:38,348 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[48207,48220] [2021-11-23 17:17:38,354 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[48968,48981] [2021-11-23 17:17:38,362 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[50057,50070] [2021-11-23 17:17:38,379 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[52062,52075] [2021-11-23 17:17:38,401 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[55451,55464] [2021-11-23 17:17:38,434 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[61148,61161] [2021-11-23 17:17:38,950 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:17:38,970 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:17:39,118 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[13533,13546] [2021-11-23 17:17:39,143 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[18033,18046] [2021-11-23 17:17:39,153 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[19325,19338] [2021-11-23 17:17:39,161 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[20083,20096] [2021-11-23 17:17:39,171 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[21703,21716] [2021-11-23 17:17:39,177 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[22461,22474] [2021-11-23 17:17:39,184 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[23547,23560] [2021-11-23 17:17:39,200 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[26086,26099] [2021-11-23 17:17:39,206 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[26847,26860] [2021-11-23 17:17:39,214 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[27936,27949] [2021-11-23 17:17:39,247 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[29941,29954] [2021-11-23 17:17:39,266 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[33864,33877] [2021-11-23 17:17:39,272 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[34625,34638] [2021-11-23 17:17:39,278 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[35718,35731] [2021-11-23 17:17:39,289 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[37727,37740] [2021-11-23 17:17:39,308 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[41330,41343] [2021-11-23 17:17:39,346 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[48207,48220] [2021-11-23 17:17:39,350 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[48968,48981] [2021-11-23 17:17:39,360 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[50057,50070] [2021-11-23 17:17:39,371 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[52062,52075] [2021-11-23 17:17:39,388 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[55451,55464] [2021-11-23 17:17:39,414 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_9bd5880b-cbfc-4481-995b-4ebe983c9de5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[61148,61161] [2021-11-23 17:17:39,775 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:17:39,806 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:17:39,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:39 WrapperNode [2021-11-23 17:17:39,807 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:17:39,808 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:17:39,808 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:17:39,808 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:17:39,815 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:39" (1/1) ... [2021-11-23 17:17:39,890 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:39" (1/1) ... [2021-11-23 17:17:40,030 INFO L137 Inliner]: procedures = 26, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 6306 [2021-11-23 17:17:40,030 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:17:40,031 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:17:40,031 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:17:40,031 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:17:40,040 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:39" (1/1) ... [2021-11-23 17:17:40,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:39" (1/1) ... [2021-11-23 17:17:40,053 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:39" (1/1) ... [2021-11-23 17:17:40,053 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:39" (1/1) ... [2021-11-23 17:17:40,121 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:39" (1/1) ... [2021-11-23 17:17:40,153 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:39" (1/1) ... [2021-11-23 17:17:40,182 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:39" (1/1) ... [2021-11-23 17:17:40,211 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:17:40,213 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:17:40,213 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:17:40,214 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:17:40,215 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:39" (1/1) ... [2021-11-23 17:17:40,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:17:40,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:17:40,251 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:17:40,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:17:40,300 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:17:40,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:17:40,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:17:40,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:17:40,656 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:17:40,657 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:17:46,079 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:17:46,111 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:17:46,111 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 17:17:46,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:17:46 BoogieIcfgContainer [2021-11-23 17:17:46,116 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:17:46,119 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:17:46,119 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:17:46,122 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:17:46,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:17:37" (1/3) ... [2021-11-23 17:17:46,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ca4b48f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:17:46, skipping insertion in model container [2021-11-23 17:17:46,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:39" (2/3) ... [2021-11-23 17:17:46,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ca4b48f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:17:46, skipping insertion in model container [2021-11-23 17:17:46,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:17:46" (3/3) ... [2021-11-23 17:17:46,127 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-23 17:17:46,132 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:17:46,133 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2021-11-23 17:17:46,208 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:17:46,217 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 17:17:46,217 INFO L340 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2021-11-23 17:17:46,275 INFO L276 IsEmpty]: Start isEmpty. Operand has 1124 states, 1101 states have (on average 1.8601271571298819) internal successors, (2048), 1123 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:46,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-23 17:17:46,308 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:17:46,309 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:17:46,310 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:17:46,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:17:46,315 INFO L85 PathProgramCache]: Analyzing trace with hash -845723877, now seen corresponding path program 1 times [2021-11-23 17:17:46,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:17:46,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1884811549] [2021-11-23 17:17:46,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:17:46,330 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:17:46,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:17:46,332 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:17:46,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:17:46,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:17:46,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:17:46,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:47,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:17:47,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:17:47,746 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:17:47,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1884811549] [2021-11-23 17:17:47,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1884811549] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:17:47,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:17:47,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:17:47,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002175517] [2021-11-23 17:17:47,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:17:47,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:17:47,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:17:47,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:17:47,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:17:47,799 INFO L87 Difference]: Start difference. First operand has 1124 states, 1101 states have (on average 1.8601271571298819) internal successors, (2048), 1123 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:48,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:17:48,698 INFO L93 Difference]: Finished difference Result 1708 states and 3002 transitions. [2021-11-23 17:17:48,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:17:48,701 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-23 17:17:48,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:17:48,724 INFO L225 Difference]: With dead ends: 1708 [2021-11-23 17:17:48,725 INFO L226 Difference]: Without dead ends: 868 [2021-11-23 17:17:48,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:17:48,736 INFO L933 BasicCegarLoop]: 1517 mSDtfsCounter, 109 mSDsluCounter, 2891 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 4408 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 494 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:17:48,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 4408 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 486 Invalid, 0 Unknown, 494 Unchecked, 0.7s Time] [2021-11-23 17:17:48,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-11-23 17:17:48,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 868. [2021-11-23 17:17:48,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 846 states have (on average 1.322695035460993) internal successors, (1119), 867 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:48,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1119 transitions. [2021-11-23 17:17:48,916 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1119 transitions. Word has length 85 [2021-11-23 17:17:48,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:17:48,917 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 1119 transitions. [2021-11-23 17:17:48,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:48,918 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1119 transitions. [2021-11-23 17:17:48,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-23 17:17:48,924 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:17:48,924 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:17:48,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:49,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:17:49,138 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:17:49,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:17:49,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1932230466, now seen corresponding path program 1 times [2021-11-23 17:17:49,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:17:49,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [266358860] [2021-11-23 17:17:49,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:17:49,141 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:17:49,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:17:49,142 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:17:49,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:17:49,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:17:49,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:17:49,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:50,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:17:50,196 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:17:50,196 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:17:50,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [266358860] [2021-11-23 17:17:50,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [266358860] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:17:50,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:17:50,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:17:50,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357063130] [2021-11-23 17:17:50,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:17:50,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:17:50,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:17:50,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:17:50,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:17:50,202 INFO L87 Difference]: Start difference. First operand 868 states and 1119 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:50,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:17:50,991 INFO L93 Difference]: Finished difference Result 1437 states and 1908 transitions. [2021-11-23 17:17:50,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:17:50,991 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-23 17:17:50,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:17:50,998 INFO L225 Difference]: With dead ends: 1437 [2021-11-23 17:17:50,998 INFO L226 Difference]: Without dead ends: 743 [2021-11-23 17:17:51,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:17:51,003 INFO L933 BasicCegarLoop]: 972 mSDtfsCounter, 32 mSDsluCounter, 1616 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 2588 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 409 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:17:51,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 2588 Invalid, 1212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 802 Invalid, 0 Unknown, 409 Unchecked, 0.7s Time] [2021-11-23 17:17:51,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2021-11-23 17:17:51,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 743. [2021-11-23 17:17:51,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 721 states have (on average 1.3564493758668517) internal successors, (978), 742 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:51,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 978 transitions. [2021-11-23 17:17:51,053 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 978 transitions. Word has length 86 [2021-11-23 17:17:51,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:17:51,054 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 978 transitions. [2021-11-23 17:17:51,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:51,055 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 978 transitions. [2021-11-23 17:17:51,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-23 17:17:51,057 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:17:51,057 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:17:51,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:51,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:17:51,270 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:17:51,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:17:51,270 INFO L85 PathProgramCache]: Analyzing trace with hash -848687014, now seen corresponding path program 1 times [2021-11-23 17:17:51,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:17:51,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1666136655] [2021-11-23 17:17:51,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:17:51,272 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:17:51,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:17:51,272 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:17:51,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:17:51,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:17:51,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:17:51,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:52,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:17:52,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:17:52,213 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:17:52,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1666136655] [2021-11-23 17:17:52,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1666136655] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:17:52,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:17:52,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:17:52,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465704582] [2021-11-23 17:17:52,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:17:52,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:17:52,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:17:52,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:17:52,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:17:52,217 INFO L87 Difference]: Start difference. First operand 743 states and 978 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:52,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:17:52,748 INFO L93 Difference]: Finished difference Result 1312 states and 1767 transitions. [2021-11-23 17:17:52,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:17:52,748 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-23 17:17:52,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:17:52,753 INFO L225 Difference]: With dead ends: 1312 [2021-11-23 17:17:52,753 INFO L226 Difference]: Without dead ends: 682 [2021-11-23 17:17:52,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:17:52,756 INFO L933 BasicCegarLoop]: 901 mSDtfsCounter, 48 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1420 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:17:52,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 1420 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 373 Invalid, 0 Unknown, 13 Unchecked, 0.5s Time] [2021-11-23 17:17:52,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-11-23 17:17:52,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2021-11-23 17:17:52,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 660 states have (on average 1.3772727272727272) internal successors, (909), 681 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:52,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 909 transitions. [2021-11-23 17:17:52,784 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 909 transitions. Word has length 87 [2021-11-23 17:17:52,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:17:52,785 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 909 transitions. [2021-11-23 17:17:52,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:52,785 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 909 transitions. [2021-11-23 17:17:52,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-23 17:17:52,788 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:17:52,788 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:17:52,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:53,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:17:53,004 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:17:53,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:17:53,004 INFO L85 PathProgramCache]: Analyzing trace with hash -957672547, now seen corresponding path program 1 times [2021-11-23 17:17:53,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:17:53,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1069303094] [2021-11-23 17:17:53,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:17:53,005 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:17:53,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:17:53,008 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:17:53,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:17:53,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:17:53,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:17:53,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:53,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:17:53,789 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:17:53,790 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:17:53,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1069303094] [2021-11-23 17:17:53,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1069303094] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:17:53,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:17:53,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:17:53,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893353482] [2021-11-23 17:17:53,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:17:53,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:17:53,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:17:53,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:17:53,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:17:53,793 INFO L87 Difference]: Start difference. First operand 682 states and 909 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:53,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:17:53,854 INFO L93 Difference]: Finished difference Result 1251 states and 1698 transitions. [2021-11-23 17:17:53,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:17:53,855 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-11-23 17:17:53,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:17:53,859 INFO L225 Difference]: With dead ends: 1251 [2021-11-23 17:17:53,859 INFO L226 Difference]: Without dead ends: 653 [2021-11-23 17:17:53,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:17:53,862 INFO L933 BasicCegarLoop]: 866 mSDtfsCounter, 42 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 1814 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 383 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:17:53,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 1814 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 383 Unchecked, 0.0s Time] [2021-11-23 17:17:53,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2021-11-23 17:17:53,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 653. [2021-11-23 17:17:53,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 631 states have (on average 1.388272583201268) internal successors, (876), 652 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:53,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 876 transitions. [2021-11-23 17:17:53,885 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 876 transitions. Word has length 88 [2021-11-23 17:17:53,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:17:53,886 INFO L470 AbstractCegarLoop]: Abstraction has 653 states and 876 transitions. [2021-11-23 17:17:53,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:53,886 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 876 transitions. [2021-11-23 17:17:53,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-23 17:17:53,889 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:17:53,890 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:17:53,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:54,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:17:54,103 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:17:54,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:17:54,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1756330343, now seen corresponding path program 1 times [2021-11-23 17:17:54,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:17:54,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1524400862] [2021-11-23 17:17:54,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:17:54,105 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:17:54,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:17:54,106 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:17:54,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:17:54,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:17:54,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:17:54,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:54,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:17:54,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:17:54,958 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:17:54,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1524400862] [2021-11-23 17:17:54,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1524400862] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:17:54,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:17:54,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:17:54,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693762825] [2021-11-23 17:17:54,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:17:54,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:17:54,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:17:54,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:17:54,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:17:54,962 INFO L87 Difference]: Start difference. First operand 653 states and 876 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:55,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:17:55,446 INFO L93 Difference]: Finished difference Result 1222 states and 1665 transitions. [2021-11-23 17:17:55,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:17:55,447 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-23 17:17:55,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:17:55,451 INFO L225 Difference]: With dead ends: 1222 [2021-11-23 17:17:55,451 INFO L226 Difference]: Without dead ends: 640 [2021-11-23 17:17:55,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:17:55,454 INFO L933 BasicCegarLoop]: 849 mSDtfsCounter, 36 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 1782 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 387 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:17:55,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 1782 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 355 Invalid, 0 Unknown, 387 Unchecked, 0.4s Time] [2021-11-23 17:17:55,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-11-23 17:17:55,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 640. [2021-11-23 17:17:55,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 618 states have (on average 1.3932038834951457) internal successors, (861), 639 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:55,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 861 transitions. [2021-11-23 17:17:55,473 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 861 transitions. Word has length 89 [2021-11-23 17:17:55,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:17:55,473 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 861 transitions. [2021-11-23 17:17:55,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:55,474 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 861 transitions. [2021-11-23 17:17:55,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-23 17:17:55,476 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:17:55,476 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:17:55,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:55,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:17:55,691 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:17:55,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:17:55,692 INFO L85 PathProgramCache]: Analyzing trace with hash -593456260, now seen corresponding path program 1 times [2021-11-23 17:17:55,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:17:55,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1135235785] [2021-11-23 17:17:55,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:17:55,693 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:17:55,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:17:55,694 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:17:55,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:17:55,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:17:55,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:17:55,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:56,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:17:56,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:17:56,438 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:17:56,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1135235785] [2021-11-23 17:17:56,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1135235785] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:17:56,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:17:56,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:17:56,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513001277] [2021-11-23 17:17:56,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:17:56,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:17:56,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:17:56,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:17:56,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:17:56,441 INFO L87 Difference]: Start difference. First operand 640 states and 861 transitions. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:57,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:17:57,128 INFO L93 Difference]: Finished difference Result 1209 states and 1650 transitions. [2021-11-23 17:17:57,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:17:57,128 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-23 17:17:57,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:17:57,133 INFO L225 Difference]: With dead ends: 1209 [2021-11-23 17:17:57,133 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:17:57,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:17:57,135 INFO L933 BasicCegarLoop]: 841 mSDtfsCounter, 20 mSDsluCounter, 1215 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 2056 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 402 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:17:57,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 2056 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 462 Invalid, 0 Unknown, 402 Unchecked, 0.6s Time] [2021-11-23 17:17:57,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:17:57,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:17:57,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.394779771615008) internal successors, (855), 634 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:57,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 855 transitions. [2021-11-23 17:17:57,159 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 855 transitions. Word has length 90 [2021-11-23 17:17:57,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:17:57,163 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 855 transitions. [2021-11-23 17:17:57,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:57,163 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 855 transitions. [2021-11-23 17:17:57,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-23 17:17:57,165 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:17:57,166 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:17:57,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:57,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:17:57,378 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:17:57,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:17:57,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1183984296, now seen corresponding path program 1 times [2021-11-23 17:17:57,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:17:57,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [989372293] [2021-11-23 17:17:57,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:17:57,380 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:17:57,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:17:57,383 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:17:57,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:17:57,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:17:57,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:17:57,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:58,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:17:58,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:17:58,405 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:17:58,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [989372293] [2021-11-23 17:17:58,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [989372293] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:17:58,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:17:58,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 17:17:58,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734921675] [2021-11-23 17:17:58,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:17:58,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 17:17:58,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:17:58,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 17:17:58,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:17:58,407 INFO L87 Difference]: Start difference. First operand 635 states and 855 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:58,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:17:58,887 INFO L93 Difference]: Finished difference Result 980 states and 1326 transitions. [2021-11-23 17:17:58,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:17:58,888 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-23 17:17:58,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:17:58,892 INFO L225 Difference]: With dead ends: 980 [2021-11-23 17:17:58,892 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:17:58,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:17:58,894 INFO L933 BasicCegarLoop]: 836 mSDtfsCounter, 36 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:17:58,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 1438 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 347 Invalid, 0 Unknown, 28 Unchecked, 0.4s Time] [2021-11-23 17:17:58,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:17:58,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:17:58,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3931484502446982) internal successors, (854), 634 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:58,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 854 transitions. [2021-11-23 17:17:58,918 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 854 transitions. Word has length 91 [2021-11-23 17:17:58,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:17:58,918 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 854 transitions. [2021-11-23 17:17:58,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:58,919 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 854 transitions. [2021-11-23 17:17:58,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-23 17:17:58,921 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:17:58,921 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:17:58,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:59,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:17:59,146 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:17:59,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:17:59,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1428942257, now seen corresponding path program 1 times [2021-11-23 17:17:59,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:17:59,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [396130797] [2021-11-23 17:17:59,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:17:59,147 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:17:59,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:17:59,148 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:17:59,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:17:59,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:17:59,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:17:59,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:00,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:18:00,629 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:00,629 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:00,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [396130797] [2021-11-23 17:18:00,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [396130797] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:00,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:00,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:18:00,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238105916] [2021-11-23 17:18:00,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:00,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:18:00,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:00,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:18:00,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:18:00,632 INFO L87 Difference]: Start difference. First operand 635 states and 854 transitions. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:01,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:01,061 INFO L93 Difference]: Finished difference Result 827 states and 1132 transitions. [2021-11-23 17:18:01,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:18:01,061 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-23 17:18:01,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:01,065 INFO L225 Difference]: With dead ends: 827 [2021-11-23 17:18:01,065 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:18:01,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:18:01,066 INFO L933 BasicCegarLoop]: 831 mSDtfsCounter, 76 mSDsluCounter, 2357 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 3188 SdHoareTripleChecker+Invalid, 1749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1406 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:01,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 3188 Invalid, 1749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 342 Invalid, 0 Unknown, 1406 Unchecked, 0.4s Time] [2021-11-23 17:18:01,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:18:01,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:18:01,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3915171288743882) internal successors, (853), 634 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:01,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 853 transitions. [2021-11-23 17:18:01,085 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 853 transitions. Word has length 91 [2021-11-23 17:18:01,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:01,086 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 853 transitions. [2021-11-23 17:18:01,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:01,086 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 853 transitions. [2021-11-23 17:18:01,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-23 17:18:01,088 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:01,089 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:18:01,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:18:01,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:01,302 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:18:01,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:01,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1459275419, now seen corresponding path program 1 times [2021-11-23 17:18:01,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:01,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2071407924] [2021-11-23 17:18:01,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:01,303 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:01,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:01,304 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:01,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:18:01,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:01,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:18:01,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:02,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:18:02,816 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:02,816 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:02,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2071407924] [2021-11-23 17:18:02,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2071407924] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:02,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:02,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:18:02,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929795751] [2021-11-23 17:18:02,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:02,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:18:02,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:02,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:18:02,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:18:02,823 INFO L87 Difference]: Start difference. First operand 635 states and 853 transitions. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:03,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:03,471 INFO L93 Difference]: Finished difference Result 758 states and 1038 transitions. [2021-11-23 17:18:03,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:18:03,471 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-23 17:18:03,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:03,475 INFO L225 Difference]: With dead ends: 758 [2021-11-23 17:18:03,475 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:18:03,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:18:03,477 INFO L933 BasicCegarLoop]: 826 mSDtfsCounter, 60 mSDsluCounter, 1069 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1895 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:03,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 1895 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 679 Invalid, 0 Unknown, 42 Unchecked, 0.6s Time] [2021-11-23 17:18:03,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:18:03,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:18:03,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3898858075040783) internal successors, (852), 634 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:03,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 852 transitions. [2021-11-23 17:18:03,497 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 852 transitions. Word has length 91 [2021-11-23 17:18:03,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:03,498 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 852 transitions. [2021-11-23 17:18:03,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:03,498 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 852 transitions. [2021-11-23 17:18:03,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-23 17:18:03,500 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:03,501 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:18:03,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-11-23 17:18:03,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:03,713 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:18:03,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:03,713 INFO L85 PathProgramCache]: Analyzing trace with hash -2136143015, now seen corresponding path program 1 times [2021-11-23 17:18:03,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:03,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1834692050] [2021-11-23 17:18:03,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:03,714 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:03,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:03,714 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:03,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 17:18:03,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:03,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:18:03,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:05,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:18:05,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:05,105 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:05,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1834692050] [2021-11-23 17:18:05,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1834692050] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:05,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:05,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:18:05,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565824236] [2021-11-23 17:18:05,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:05,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:18:05,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:05,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:18:05,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:18:05,107 INFO L87 Difference]: Start difference. First operand 635 states and 852 transitions. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:05,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:05,753 INFO L93 Difference]: Finished difference Result 857 states and 1157 transitions. [2021-11-23 17:18:05,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:18:05,754 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-23 17:18:05,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:05,758 INFO L225 Difference]: With dead ends: 857 [2021-11-23 17:18:05,758 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:18:05,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:18:05,759 INFO L933 BasicCegarLoop]: 829 mSDtfsCounter, 54 mSDsluCounter, 1922 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 2751 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 718 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:05,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 2751 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 682 Invalid, 0 Unknown, 718 Unchecked, 0.6s Time] [2021-11-23 17:18:05,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:18:05,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:18:05,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3882544861337685) internal successors, (851), 634 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:05,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 851 transitions. [2021-11-23 17:18:05,778 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 851 transitions. Word has length 93 [2021-11-23 17:18:05,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:05,778 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 851 transitions. [2021-11-23 17:18:05,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:05,779 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 851 transitions. [2021-11-23 17:18:05,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-23 17:18:05,781 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:05,781 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:18:05,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:18:05,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:05,994 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:18:05,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:05,994 INFO L85 PathProgramCache]: Analyzing trace with hash -2068984294, now seen corresponding path program 1 times [2021-11-23 17:18:05,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:05,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [599671866] [2021-11-23 17:18:05,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:05,995 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:05,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:05,996 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:06,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 17:18:06,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:06,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:18:06,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:07,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:18:07,440 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:07,440 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:07,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [599671866] [2021-11-23 17:18:07,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [599671866] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:07,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:07,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:18:07,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822346452] [2021-11-23 17:18:07,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:07,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:18:07,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:07,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:18:07,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:18:07,443 INFO L87 Difference]: Start difference. First operand 635 states and 851 transitions. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:07,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:07,954 INFO L93 Difference]: Finished difference Result 735 states and 1001 transitions. [2021-11-23 17:18:07,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:18:07,963 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-23 17:18:07,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:07,968 INFO L225 Difference]: With dead ends: 735 [2021-11-23 17:18:07,968 INFO L226 Difference]: Without dead ends: 636 [2021-11-23 17:18:07,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:18:07,970 INFO L933 BasicCegarLoop]: 820 mSDtfsCounter, 54 mSDsluCounter, 2774 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 3594 SdHoareTripleChecker+Invalid, 1718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1373 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:07,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 3594 Invalid, 1718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 344 Invalid, 0 Unknown, 1373 Unchecked, 0.5s Time] [2021-11-23 17:18:07,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-11-23 17:18:07,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 635. [2021-11-23 17:18:07,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3866231647634584) internal successors, (850), 634 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:07,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 850 transitions. [2021-11-23 17:18:07,994 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 850 transitions. Word has length 93 [2021-11-23 17:18:07,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:07,995 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 850 transitions. [2021-11-23 17:18:07,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:07,996 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 850 transitions. [2021-11-23 17:18:07,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-23 17:18:07,998 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:07,998 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:18:08,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:18:08,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:08,211 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:18:08,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:08,211 INFO L85 PathProgramCache]: Analyzing trace with hash 928092964, now seen corresponding path program 1 times [2021-11-23 17:18:08,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:08,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1036354231] [2021-11-23 17:18:08,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:08,212 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:08,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:08,213 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:08,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 17:18:08,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:08,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:18:08,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:09,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:18:09,719 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:09,719 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:09,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1036354231] [2021-11-23 17:18:09,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1036354231] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:09,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:09,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:18:09,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313702214] [2021-11-23 17:18:09,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:09,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:18:09,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:09,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:18:09,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:18:09,722 INFO L87 Difference]: Start difference. First operand 635 states and 850 transitions. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:10,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:10,118 INFO L93 Difference]: Finished difference Result 773 states and 1047 transitions. [2021-11-23 17:18:10,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:18:10,119 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-23 17:18:10,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:10,123 INFO L225 Difference]: With dead ends: 773 [2021-11-23 17:18:10,123 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:18:10,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:18:10,124 INFO L933 BasicCegarLoop]: 823 mSDtfsCounter, 77 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 1468 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:10,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 1468 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 334 Invalid, 0 Unknown, 42 Unchecked, 0.4s Time] [2021-11-23 17:18:10,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:18:10,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:18:10,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3849918433931485) internal successors, (849), 634 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:10,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 849 transitions. [2021-11-23 17:18:10,146 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 849 transitions. Word has length 93 [2021-11-23 17:18:10,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:10,146 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 849 transitions. [2021-11-23 17:18:10,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:10,147 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 849 transitions. [2021-11-23 17:18:10,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-23 17:18:10,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:10,150 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:18:10,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:18:10,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:10,376 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:18:10,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:10,376 INFO L85 PathProgramCache]: Analyzing trace with hash 538302253, now seen corresponding path program 1 times [2021-11-23 17:18:10,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:10,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1270737571] [2021-11-23 17:18:10,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:10,378 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:10,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:10,378 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:10,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 17:18:10,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:10,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:18:10,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:11,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:18:11,829 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:11,829 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:11,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1270737571] [2021-11-23 17:18:11,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1270737571] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:11,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:11,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:18:11,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963386429] [2021-11-23 17:18:11,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:11,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:18:11,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:11,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:18:11,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:18:11,832 INFO L87 Difference]: Start difference. First operand 635 states and 849 transitions. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:12,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:12,436 INFO L93 Difference]: Finished difference Result 734 states and 999 transitions. [2021-11-23 17:18:12,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:18:12,436 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-23 17:18:12,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:12,440 INFO L225 Difference]: With dead ends: 734 [2021-11-23 17:18:12,440 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:18:12,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:18:12,441 INFO L933 BasicCegarLoop]: 818 mSDtfsCounter, 51 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 2307 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 374 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:12,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 2307 Invalid, 1044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 669 Invalid, 0 Unknown, 374 Unchecked, 0.6s Time] [2021-11-23 17:18:12,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:18:12,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:18:12,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3833605220228384) internal successors, (848), 634 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:12,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 848 transitions. [2021-11-23 17:18:12,462 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 848 transitions. Word has length 93 [2021-11-23 17:18:12,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:12,463 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 848 transitions. [2021-11-23 17:18:12,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:12,463 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 848 transitions. [2021-11-23 17:18:12,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-23 17:18:12,465 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:12,465 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:18:12,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:18:12,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:12,678 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:18:12,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:12,678 INFO L85 PathProgramCache]: Analyzing trace with hash -350742557, now seen corresponding path program 1 times [2021-11-23 17:18:12,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:12,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [689506346] [2021-11-23 17:18:12,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:12,679 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:12,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:12,681 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:12,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 17:18:12,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:12,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:18:12,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:13,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:18:13,994 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:13,994 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:13,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [689506346] [2021-11-23 17:18:13,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [689506346] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:13,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:13,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:18:13,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20363443] [2021-11-23 17:18:13,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:13,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:18:13,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:13,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:18:13,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:18:13,996 INFO L87 Difference]: Start difference. First operand 635 states and 848 transitions. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:14,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:14,350 INFO L93 Difference]: Finished difference Result 773 states and 1048 transitions. [2021-11-23 17:18:14,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:18:14,351 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-23 17:18:14,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:14,356 INFO L225 Difference]: With dead ends: 773 [2021-11-23 17:18:14,356 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:18:14,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:18:14,358 INFO L933 BasicCegarLoop]: 821 mSDtfsCounter, 77 mSDsluCounter, 1503 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 2324 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 706 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:14,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 2324 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 332 Invalid, 0 Unknown, 706 Unchecked, 0.3s Time] [2021-11-23 17:18:14,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:18:14,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:18:14,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3817292006525286) internal successors, (847), 634 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:14,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 847 transitions. [2021-11-23 17:18:14,377 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 847 transitions. Word has length 93 [2021-11-23 17:18:14,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:14,377 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 847 transitions. [2021-11-23 17:18:14,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:14,378 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 847 transitions. [2021-11-23 17:18:14,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-23 17:18:14,380 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:14,381 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:18:14,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:18:14,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:14,598 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:18:14,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:14,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1779757049, now seen corresponding path program 1 times [2021-11-23 17:18:14,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:14,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1592625616] [2021-11-23 17:18:14,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:14,599 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:14,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:14,602 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:14,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 17:18:14,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:14,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:18:14,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:16,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:18:16,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:16,104 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:16,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1592625616] [2021-11-23 17:18:16,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1592625616] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:16,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:16,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:18:16,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087256338] [2021-11-23 17:18:16,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:16,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:18:16,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:16,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:18:16,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:18:16,106 INFO L87 Difference]: Start difference. First operand 635 states and 847 transitions. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:16,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:16,659 INFO L93 Difference]: Finished difference Result 728 states and 991 transitions. [2021-11-23 17:18:16,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:18:16,660 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-23 17:18:16,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:16,662 INFO L225 Difference]: With dead ends: 728 [2021-11-23 17:18:16,662 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:18:16,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:18:16,664 INFO L933 BasicCegarLoop]: 816 mSDtfsCounter, 63 mSDsluCounter, 2350 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 3166 SdHoareTripleChecker+Invalid, 1696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1030 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:16,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 3166 Invalid, 1696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 665 Invalid, 0 Unknown, 1030 Unchecked, 0.5s Time] [2021-11-23 17:18:16,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:18:16,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:18:16,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3800978792822185) internal successors, (846), 634 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:16,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 846 transitions. [2021-11-23 17:18:16,683 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 846 transitions. Word has length 93 [2021-11-23 17:18:16,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:16,683 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 846 transitions. [2021-11-23 17:18:16,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:16,684 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 846 transitions. [2021-11-23 17:18:16,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-23 17:18:16,686 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:16,686 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:18:16,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 17:18:16,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:16,917 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:18:16,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:16,918 INFO L85 PathProgramCache]: Analyzing trace with hash 162924990, now seen corresponding path program 1 times [2021-11-23 17:18:16,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:16,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1288636650] [2021-11-23 17:18:16,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:16,919 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:16,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:16,920 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:16,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 17:18:17,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:17,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:18:17,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:18,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:18:18,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:18,450 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:18,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1288636650] [2021-11-23 17:18:18,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1288636650] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:18,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:18,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:18:18,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68782517] [2021-11-23 17:18:18,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:18,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:18:18,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:18,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:18:18,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:18:18,453 INFO L87 Difference]: Start difference. First operand 635 states and 846 transitions. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:18,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:18,863 INFO L93 Difference]: Finished difference Result 734 states and 995 transitions. [2021-11-23 17:18:18,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:18:18,863 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-23 17:18:18,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:18,866 INFO L225 Difference]: With dead ends: 734 [2021-11-23 17:18:18,867 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:18:18,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:18:18,868 INFO L933 BasicCegarLoop]: 815 mSDtfsCounter, 61 mSDsluCounter, 1495 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 2310 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 374 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:18,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 2310 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 339 Invalid, 0 Unknown, 374 Unchecked, 0.4s Time] [2021-11-23 17:18:18,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:18:18,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:18:18,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3784665579119086) internal successors, (845), 634 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:18,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 845 transitions. [2021-11-23 17:18:18,885 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 845 transitions. Word has length 93 [2021-11-23 17:18:18,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:18,886 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 845 transitions. [2021-11-23 17:18:18,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:18,887 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 845 transitions. [2021-11-23 17:18:18,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 17:18:18,889 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:18,889 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:18:18,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-23 17:18:19,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:19,101 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:18:19,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:19,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1878690134, now seen corresponding path program 1 times [2021-11-23 17:18:19,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:19,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [343917391] [2021-11-23 17:18:19,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:19,103 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:19,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:19,104 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:19,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 17:18:19,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:19,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:18:19,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:20,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:18:20,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:20,435 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:20,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [343917391] [2021-11-23 17:18:20,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [343917391] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:20,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:20,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:18:20,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741066059] [2021-11-23 17:18:20,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:20,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:18:20,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:20,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:18:20,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:18:20,437 INFO L87 Difference]: Start difference. First operand 635 states and 845 transitions. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:20,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:20,923 INFO L93 Difference]: Finished difference Result 744 states and 1004 transitions. [2021-11-23 17:18:20,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:18:20,923 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-23 17:18:20,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:20,926 INFO L225 Difference]: With dead ends: 744 [2021-11-23 17:18:20,926 INFO L226 Difference]: Without dead ends: 636 [2021-11-23 17:18:20,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:18:20,927 INFO L933 BasicCegarLoop]: 814 mSDtfsCounter, 49 mSDsluCounter, 2353 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 3167 SdHoareTripleChecker+Invalid, 1683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1021 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:20,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 3167 Invalid, 1683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 661 Invalid, 0 Unknown, 1021 Unchecked, 0.4s Time] [2021-11-23 17:18:20,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-11-23 17:18:20,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 635. [2021-11-23 17:18:20,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3768352365415988) internal successors, (844), 634 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:20,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 844 transitions. [2021-11-23 17:18:20,944 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 844 transitions. Word has length 95 [2021-11-23 17:18:20,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:20,945 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 844 transitions. [2021-11-23 17:18:20,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:20,945 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 844 transitions. [2021-11-23 17:18:20,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 17:18:20,947 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:20,947 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:18:20,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-23 17:18:21,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:21,160 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:18:21,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:21,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1469844906, now seen corresponding path program 1 times [2021-11-23 17:18:21,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:21,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [826939321] [2021-11-23 17:18:21,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:21,161 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:21,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:21,162 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:21,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 17:18:21,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:21,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:18:21,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:22,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:18:22,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:22,473 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:22,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [826939321] [2021-11-23 17:18:22,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [826939321] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:22,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:22,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:18:22,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96407012] [2021-11-23 17:18:22,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:22,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:18:22,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:22,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:18:22,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:18:22,475 INFO L87 Difference]: Start difference. First operand 635 states and 844 transitions. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:23,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:23,175 INFO L93 Difference]: Finished difference Result 722 states and 976 transitions. [2021-11-23 17:18:23,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:18:23,176 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-23 17:18:23,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:23,179 INFO L225 Difference]: With dead ends: 722 [2021-11-23 17:18:23,179 INFO L226 Difference]: Without dead ends: 636 [2021-11-23 17:18:23,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:18:23,183 INFO L933 BasicCegarLoop]: 809 mSDtfsCounter, 64 mSDsluCounter, 2337 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 3146 SdHoareTripleChecker+Invalid, 1682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1018 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:23,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 3146 Invalid, 1682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 663 Invalid, 0 Unknown, 1018 Unchecked, 0.6s Time] [2021-11-23 17:18:23,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-11-23 17:18:23,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 635. [2021-11-23 17:18:23,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3752039151712887) internal successors, (843), 634 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:23,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 843 transitions. [2021-11-23 17:18:23,202 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 843 transitions. Word has length 95 [2021-11-23 17:18:23,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:23,203 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 843 transitions. [2021-11-23 17:18:23,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:23,203 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 843 transitions. [2021-11-23 17:18:23,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 17:18:23,205 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:23,205 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:18:23,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-23 17:18:23,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:23,423 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:18:23,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:23,423 INFO L85 PathProgramCache]: Analyzing trace with hash -2020844490, now seen corresponding path program 1 times [2021-11-23 17:18:23,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:23,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [592470273] [2021-11-23 17:18:23,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:23,424 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:23,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:23,425 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:23,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 17:18:23,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:23,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:18:23,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:24,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:18:24,761 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:24,761 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:24,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [592470273] [2021-11-23 17:18:24,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [592470273] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:24,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:24,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:18:24,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899876265] [2021-11-23 17:18:24,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:24,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:18:24,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:24,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:18:24,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:18:24,764 INFO L87 Difference]: Start difference. First operand 635 states and 843 transitions. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:25,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:25,255 INFO L93 Difference]: Finished difference Result 788 states and 1056 transitions. [2021-11-23 17:18:25,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:18:25,263 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-23 17:18:25,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:25,267 INFO L225 Difference]: With dead ends: 788 [2021-11-23 17:18:25,267 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:18:25,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:18:25,269 INFO L933 BasicCegarLoop]: 816 mSDtfsCounter, 54 mSDsluCounter, 2786 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 3602 SdHoareTripleChecker+Invalid, 2009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1349 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:25,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 3602 Invalid, 2009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 659 Invalid, 0 Unknown, 1349 Unchecked, 0.5s Time] [2021-11-23 17:18:25,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:18:25,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:18:25,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3735725938009788) internal successors, (842), 634 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:25,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 842 transitions. [2021-11-23 17:18:25,286 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 842 transitions. Word has length 95 [2021-11-23 17:18:25,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:25,287 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 842 transitions. [2021-11-23 17:18:25,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:25,287 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 842 transitions. [2021-11-23 17:18:25,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 17:18:25,290 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:25,290 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:18:25,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-23 17:18:25,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:25,507 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:18:25,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:25,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1920722797, now seen corresponding path program 1 times [2021-11-23 17:18:25,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:25,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2141346387] [2021-11-23 17:18:25,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:25,508 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:25,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:25,509 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:25,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-23 17:18:25,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:25,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:18:25,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:26,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:18:26,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:26,932 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:26,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2141346387] [2021-11-23 17:18:26,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2141346387] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:26,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:26,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:18:26,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016398142] [2021-11-23 17:18:26,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:26,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:18:26,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:26,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:18:26,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:18:26,935 INFO L87 Difference]: Start difference. First operand 635 states and 842 transitions. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:27,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:27,432 INFO L93 Difference]: Finished difference Result 717 states and 969 transitions. [2021-11-23 17:18:27,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:18:27,432 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-23 17:18:27,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:27,435 INFO L225 Difference]: With dead ends: 717 [2021-11-23 17:18:27,435 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:18:27,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:18:27,436 INFO L933 BasicCegarLoop]: 807 mSDtfsCounter, 53 mSDsluCounter, 2760 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 3567 SdHoareTripleChecker+Invalid, 1671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1327 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:27,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 3567 Invalid, 1671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 343 Invalid, 0 Unknown, 1327 Unchecked, 0.4s Time] [2021-11-23 17:18:27,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:18:27,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:18:27,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3719412724306688) internal successors, (841), 634 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:27,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 841 transitions. [2021-11-23 17:18:27,453 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 841 transitions. Word has length 95 [2021-11-23 17:18:27,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:27,454 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 841 transitions. [2021-11-23 17:18:27,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:27,454 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 841 transitions. [2021-11-23 17:18:27,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 17:18:27,456 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:27,456 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:18:27,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-23 17:18:27,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:27,676 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:18:27,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:27,676 INFO L85 PathProgramCache]: Analyzing trace with hash -523524958, now seen corresponding path program 1 times [2021-11-23 17:18:27,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:27,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1229645048] [2021-11-23 17:18:27,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:27,677 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:27,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:27,678 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:27,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-23 17:18:27,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:27,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:18:27,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:29,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:18:29,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:29,077 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:29,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1229645048] [2021-11-23 17:18:29,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1229645048] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:29,078 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:29,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:18:29,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948947679] [2021-11-23 17:18:29,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:29,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:18:29,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:29,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:18:29,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:18:29,079 INFO L87 Difference]: Start difference. First operand 635 states and 841 transitions. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:29,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:29,556 INFO L93 Difference]: Finished difference Result 721 states and 971 transitions. [2021-11-23 17:18:29,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:18:29,556 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-23 17:18:29,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:29,559 INFO L225 Difference]: With dead ends: 721 [2021-11-23 17:18:29,559 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:18:29,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:18:29,560 INFO L933 BasicCegarLoop]: 806 mSDtfsCounter, 64 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 2302 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 373 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:29,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 2302 Invalid, 1031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 657 Invalid, 0 Unknown, 373 Unchecked, 0.4s Time] [2021-11-23 17:18:29,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:18:29,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:18:29,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.370309951060359) internal successors, (840), 634 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:29,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 840 transitions. [2021-11-23 17:18:29,575 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 840 transitions. Word has length 95 [2021-11-23 17:18:29,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:29,575 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 840 transitions. [2021-11-23 17:18:29,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:29,576 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 840 transitions. [2021-11-23 17:18:29,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 17:18:29,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:29,578 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:18:29,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-23 17:18:29,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:29,789 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:18:29,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:29,789 INFO L85 PathProgramCache]: Analyzing trace with hash -891627133, now seen corresponding path program 1 times [2021-11-23 17:18:29,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:29,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1039613944] [2021-11-23 17:18:29,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:29,790 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:29,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:29,791 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:29,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-23 17:18:30,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:30,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:18:30,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:31,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:18:31,110 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:31,110 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:31,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1039613944] [2021-11-23 17:18:31,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1039613944] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:31,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:31,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:18:31,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066291224] [2021-11-23 17:18:31,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:31,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:18:31,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:31,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:18:31,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:18:31,113 INFO L87 Difference]: Start difference. First operand 635 states and 840 transitions. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:31,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:31,435 INFO L93 Difference]: Finished difference Result 722 states and 971 transitions. [2021-11-23 17:18:31,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:18:31,437 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-23 17:18:31,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:31,440 INFO L225 Difference]: With dead ends: 722 [2021-11-23 17:18:31,440 INFO L226 Difference]: Without dead ends: 636 [2021-11-23 17:18:31,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:18:31,441 INFO L933 BasicCegarLoop]: 805 mSDtfsCounter, 76 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 1488 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:31,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 1488 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 316 Invalid, 0 Unknown, 51 Unchecked, 0.3s Time] [2021-11-23 17:18:31,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-11-23 17:18:31,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 635. [2021-11-23 17:18:31,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3686786296900488) internal successors, (839), 634 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:31,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 839 transitions. [2021-11-23 17:18:31,457 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 839 transitions. Word has length 95 [2021-11-23 17:18:31,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:31,458 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 839 transitions. [2021-11-23 17:18:31,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:31,459 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 839 transitions. [2021-11-23 17:18:31,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 17:18:31,460 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:31,460 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:18:31,474 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-11-23 17:18:31,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:31,674 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:18:31,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:31,675 INFO L85 PathProgramCache]: Analyzing trace with hash -482781905, now seen corresponding path program 1 times [2021-11-23 17:18:31,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:31,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1929831278] [2021-11-23 17:18:31,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:31,676 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:31,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:31,677 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:31,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-23 17:18:31,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:31,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:18:31,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:33,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:18:33,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:33,087 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:33,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1929831278] [2021-11-23 17:18:33,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1929831278] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:33,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:33,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:18:33,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754214644] [2021-11-23 17:18:33,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:33,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:18:33,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:33,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:18:33,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:18:33,089 INFO L87 Difference]: Start difference. First operand 635 states and 839 transitions. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:33,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:33,423 INFO L93 Difference]: Finished difference Result 743 states and 995 transitions. [2021-11-23 17:18:33,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:18:33,424 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-23 17:18:33,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:33,426 INFO L225 Difference]: With dead ends: 743 [2021-11-23 17:18:33,426 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:18:33,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:18:33,427 INFO L933 BasicCegarLoop]: 808 mSDtfsCounter, 76 mSDsluCounter, 1087 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 1895 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 367 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:33,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 1895 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 319 Invalid, 0 Unknown, 367 Unchecked, 0.3s Time] [2021-11-23 17:18:33,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:18:33,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:18:33,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.367047308319739) internal successors, (838), 634 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:33,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 838 transitions. [2021-11-23 17:18:33,444 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 838 transitions. Word has length 95 [2021-11-23 17:18:33,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:33,445 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 838 transitions. [2021-11-23 17:18:33,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:33,445 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 838 transitions. [2021-11-23 17:18:33,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 17:18:33,447 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:33,447 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:18:33,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-23 17:18:33,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:33,659 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:18:33,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:33,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1112928597, now seen corresponding path program 1 times [2021-11-23 17:18:33,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:33,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1754512340] [2021-11-23 17:18:33,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:33,661 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:33,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:33,661 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:33,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-23 17:18:33,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:33,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:18:33,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:34,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:18:34,879 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:34,879 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:34,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1754512340] [2021-11-23 17:18:34,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1754512340] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:34,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:34,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:18:34,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469246751] [2021-11-23 17:18:34,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:34,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:18:34,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:34,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:18:34,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:18:34,882 INFO L87 Difference]: Start difference. First operand 635 states and 838 transitions. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:35,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:35,208 INFO L93 Difference]: Finished difference Result 721 states and 969 transitions. [2021-11-23 17:18:35,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:18:35,208 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-23 17:18:35,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:35,211 INFO L225 Difference]: With dead ends: 721 [2021-11-23 17:18:35,211 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:18:35,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:18:35,212 INFO L933 BasicCegarLoop]: 803 mSDtfsCounter, 76 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 1486 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:35,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 1486 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 314 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2021-11-23 17:18:35,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:18:35,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:18:35,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3654159869494291) internal successors, (837), 634 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:35,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 837 transitions. [2021-11-23 17:18:35,228 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 837 transitions. Word has length 95 [2021-11-23 17:18:35,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:35,229 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 837 transitions. [2021-11-23 17:18:35,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:35,229 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 837 transitions. [2021-11-23 17:18:35,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 17:18:35,230 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:35,231 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:18:35,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-23 17:18:35,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:35,442 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:18:35,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:35,443 INFO L85 PathProgramCache]: Analyzing trace with hash -738270563, now seen corresponding path program 1 times [2021-11-23 17:18:35,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:35,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [88987378] [2021-11-23 17:18:35,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:35,444 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:35,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:35,445 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:35,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-23 17:18:35,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:35,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:18:35,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:36,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:18:36,829 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:36,829 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:36,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [88987378] [2021-11-23 17:18:36,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [88987378] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:36,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:36,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:18:36,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361812603] [2021-11-23 17:18:36,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:36,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:18:36,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:36,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:18:36,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:18:36,831 INFO L87 Difference]: Start difference. First operand 635 states and 837 transitions. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:37,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:37,142 INFO L93 Difference]: Finished difference Result 717 states and 964 transitions. [2021-11-23 17:18:37,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:18:37,143 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-23 17:18:37,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:37,145 INFO L225 Difference]: With dead ends: 717 [2021-11-23 17:18:37,145 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:18:37,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:18:37,147 INFO L933 BasicCegarLoop]: 802 mSDtfsCounter, 66 mSDsluCounter, 1106 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 1908 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 361 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:37,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 1908 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 313 Invalid, 0 Unknown, 361 Unchecked, 0.3s Time] [2021-11-23 17:18:37,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:18:37,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:18:37,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.363784665579119) internal successors, (836), 634 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:37,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 836 transitions. [2021-11-23 17:18:37,162 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 836 transitions. Word has length 95 [2021-11-23 17:18:37,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:37,163 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 836 transitions. [2021-11-23 17:18:37,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:37,163 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 836 transitions. [2021-11-23 17:18:37,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 17:18:37,165 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:37,165 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:18:37,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-11-23 17:18:37,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:37,378 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:18:37,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:37,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1153671650, now seen corresponding path program 1 times [2021-11-23 17:18:37,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:37,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1385272971] [2021-11-23 17:18:37,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:37,379 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:37,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:37,380 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:37,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-23 17:18:37,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:37,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:18:37,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:38,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:18:38,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:38,583 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:38,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1385272971] [2021-11-23 17:18:38,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1385272971] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:38,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:38,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:18:38,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616148860] [2021-11-23 17:18:38,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:38,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:18:38,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:38,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:18:38,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:18:38,586 INFO L87 Difference]: Start difference. First operand 635 states and 836 transitions. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:38,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:38,943 INFO L93 Difference]: Finished difference Result 743 states and 994 transitions. [2021-11-23 17:18:38,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:18:38,943 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-23 17:18:38,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:38,946 INFO L225 Difference]: With dead ends: 743 [2021-11-23 17:18:38,946 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:18:38,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:18:38,947 INFO L933 BasicCegarLoop]: 805 mSDtfsCounter, 76 mSDsluCounter, 1936 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 2741 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 997 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:38,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 2741 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 316 Invalid, 0 Unknown, 997 Unchecked, 0.3s Time] [2021-11-23 17:18:38,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:18:38,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:18:38,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3621533442088092) internal successors, (835), 634 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:38,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 835 transitions. [2021-11-23 17:18:38,962 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 835 transitions. Word has length 95 [2021-11-23 17:18:38,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:38,962 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 835 transitions. [2021-11-23 17:18:38,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:38,963 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 835 transitions. [2021-11-23 17:18:38,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 17:18:38,964 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:38,964 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:18:38,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-23 17:18:39,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:39,176 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:18:39,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:39,177 INFO L85 PathProgramCache]: Analyzing trace with hash 744826422, now seen corresponding path program 1 times [2021-11-23 17:18:39,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:39,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [556813218] [2021-11-23 17:18:39,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:39,177 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:39,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:39,178 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:39,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-23 17:18:39,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:39,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:18:39,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:40,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:18:40,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:40,411 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:40,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [556813218] [2021-11-23 17:18:40,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [556813218] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:40,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:40,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:18:40,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287752305] [2021-11-23 17:18:40,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:40,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:18:40,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:40,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:18:40,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:18:40,413 INFO L87 Difference]: Start difference. First operand 635 states and 835 transitions. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:40,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:40,748 INFO L93 Difference]: Finished difference Result 721 states and 966 transitions. [2021-11-23 17:18:40,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:18:40,749 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-23 17:18:40,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:40,751 INFO L225 Difference]: With dead ends: 721 [2021-11-23 17:18:40,751 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:18:40,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:18:40,752 INFO L933 BasicCegarLoop]: 800 mSDtfsCounter, 76 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 1483 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:40,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 1483 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 311 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2021-11-23 17:18:40,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:18:40,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:18:40,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.360522022838499) internal successors, (834), 634 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:40,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 834 transitions. [2021-11-23 17:18:40,763 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 834 transitions. Word has length 95 [2021-11-23 17:18:40,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:40,763 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 834 transitions. [2021-11-23 17:18:40,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:40,763 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 834 transitions. [2021-11-23 17:18:40,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 17:18:40,764 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:40,764 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:18:40,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-23 17:18:40,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:40,965 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:18:40,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:40,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1037319048, now seen corresponding path program 1 times [2021-11-23 17:18:40,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:40,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1146784531] [2021-11-23 17:18:40,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:40,966 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:40,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:40,967 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:40,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-23 17:18:41,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:41,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:18:41,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:42,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:18:42,217 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:42,217 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:42,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1146784531] [2021-11-23 17:18:42,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1146784531] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:42,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:42,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:18:42,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598637101] [2021-11-23 17:18:42,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:42,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:18:42,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:42,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:18:42,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:18:42,219 INFO L87 Difference]: Start difference. First operand 635 states and 834 transitions. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:42,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:42,596 INFO L93 Difference]: Finished difference Result 717 states and 961 transitions. [2021-11-23 17:18:42,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:18:42,596 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-23 17:18:42,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:42,599 INFO L225 Difference]: With dead ends: 717 [2021-11-23 17:18:42,599 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:18:42,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:18:42,600 INFO L933 BasicCegarLoop]: 799 mSDtfsCounter, 65 mSDsluCounter, 1500 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 2299 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 360 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:42,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 2299 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 335 Invalid, 0 Unknown, 360 Unchecked, 0.3s Time] [2021-11-23 17:18:42,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:18:42,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:18:42,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3588907014681892) internal successors, (833), 634 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:42,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 833 transitions. [2021-11-23 17:18:42,612 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 833 transitions. Word has length 95 [2021-11-23 17:18:42,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:42,612 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 833 transitions. [2021-11-23 17:18:42,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:42,613 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 833 transitions. [2021-11-23 17:18:42,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 17:18:42,614 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:42,614 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:18:42,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-23 17:18:42,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:42,815 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:18:42,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:42,815 INFO L85 PathProgramCache]: Analyzing trace with hash -359034935, now seen corresponding path program 1 times [2021-11-23 17:18:42,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:42,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1172706237] [2021-11-23 17:18:42,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:42,816 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:42,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:42,817 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:42,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-23 17:18:43,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:43,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:18:43,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:44,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:18:44,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:44,060 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:44,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1172706237] [2021-11-23 17:18:44,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1172706237] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:44,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:44,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:18:44,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383424118] [2021-11-23 17:18:44,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:44,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:18:44,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:44,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:18:44,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:18:44,062 INFO L87 Difference]: Start difference. First operand 635 states and 833 transitions. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:44,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:44,101 INFO L93 Difference]: Finished difference Result 715 states and 958 transitions. [2021-11-23 17:18:44,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:18:44,102 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-23 17:18:44,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:44,106 INFO L225 Difference]: With dead ends: 715 [2021-11-23 17:18:44,106 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:18:44,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:18:44,108 INFO L933 BasicCegarLoop]: 799 mSDtfsCounter, 54 mSDsluCounter, 1120 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1919 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 355 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:44,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 1919 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 355 Unchecked, 0.0s Time] [2021-11-23 17:18:44,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:18:44,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:18:44,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3572593800978794) internal successors, (832), 634 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:44,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 832 transitions. [2021-11-23 17:18:44,125 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 832 transitions. Word has length 95 [2021-11-23 17:18:44,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:44,126 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 832 transitions. [2021-11-23 17:18:44,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:44,126 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 832 transitions. [2021-11-23 17:18:44,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 17:18:44,127 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:44,128 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:18:44,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-23 17:18:44,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:44,341 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:18:44,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:44,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1152638694, now seen corresponding path program 1 times [2021-11-23 17:18:44,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:44,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [36683817] [2021-11-23 17:18:44,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:44,342 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:44,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:44,343 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:44,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-23 17:18:44,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:44,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:18:44,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:45,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:18:45,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:45,558 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:45,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [36683817] [2021-11-23 17:18:45,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [36683817] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:45,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:45,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:18:45,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950882959] [2021-11-23 17:18:45,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:45,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:18:45,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:45,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:18:45,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:18:45,559 INFO L87 Difference]: Start difference. First operand 635 states and 832 transitions. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:46,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:46,013 INFO L93 Difference]: Finished difference Result 721 states and 962 transitions. [2021-11-23 17:18:46,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:18:46,014 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-23 17:18:46,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:46,016 INFO L225 Difference]: With dead ends: 721 [2021-11-23 17:18:46,017 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:18:46,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:18:46,018 INFO L933 BasicCegarLoop]: 797 mSDtfsCounter, 54 mSDsluCounter, 2760 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 3557 SdHoareTripleChecker+Invalid, 1927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1287 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:46,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 3557 Invalid, 1927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 639 Invalid, 0 Unknown, 1287 Unchecked, 0.4s Time] [2021-11-23 17:18:46,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:18:46,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:18:46,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3556280587275693) internal successors, (831), 634 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:46,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 831 transitions. [2021-11-23 17:18:46,036 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 831 transitions. Word has length 95 [2021-11-23 17:18:46,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:46,036 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 831 transitions. [2021-11-23 17:18:46,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:46,037 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 831 transitions. [2021-11-23 17:18:46,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 17:18:46,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:46,039 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:18:46,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-11-23 17:18:46,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:46,252 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:18:46,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:46,253 INFO L85 PathProgramCache]: Analyzing trace with hash -698776940, now seen corresponding path program 1 times [2021-11-23 17:18:46,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:46,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1997476333] [2021-11-23 17:18:46,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:46,253 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:46,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:46,254 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:46,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-23 17:18:46,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:46,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:18:46,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:47,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:18:47,376 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:47,376 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:47,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1997476333] [2021-11-23 17:18:47,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1997476333] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:47,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:47,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:18:47,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292609758] [2021-11-23 17:18:47,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:47,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:18:47,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:47,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:18:47,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:18:47,378 INFO L87 Difference]: Start difference. First operand 635 states and 831 transitions. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:47,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:47,662 INFO L93 Difference]: Finished difference Result 717 states and 958 transitions. [2021-11-23 17:18:47,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:18:47,662 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-23 17:18:47,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:47,665 INFO L225 Difference]: With dead ends: 717 [2021-11-23 17:18:47,665 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:18:47,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:18:47,666 INFO L933 BasicCegarLoop]: 796 mSDtfsCounter, 66 mSDsluCounter, 1942 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 2738 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 975 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:47,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 2738 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 307 Invalid, 0 Unknown, 975 Unchecked, 0.3s Time] [2021-11-23 17:18:47,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:18:47,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:18:47,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3539967373572595) internal successors, (830), 634 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:47,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 830 transitions. [2021-11-23 17:18:47,676 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 830 transitions. Word has length 95 [2021-11-23 17:18:47,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:47,676 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 830 transitions. [2021-11-23 17:18:47,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:47,676 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 830 transitions. [2021-11-23 17:18:47,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 17:18:47,677 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:47,677 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:18:47,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-23 17:18:47,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:47,879 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:18:47,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:47,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1541256586, now seen corresponding path program 1 times [2021-11-23 17:18:47,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:47,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1339988101] [2021-11-23 17:18:47,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:47,880 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:47,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:47,881 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:47,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-23 17:18:48,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:48,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:18:48,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:49,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:18:49,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:49,118 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:49,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1339988101] [2021-11-23 17:18:49,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1339988101] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:49,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:49,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:18:49,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966495178] [2021-11-23 17:18:49,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:49,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:18:49,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:49,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:18:49,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:18:49,120 INFO L87 Difference]: Start difference. First operand 635 states and 830 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:49,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:49,538 INFO L93 Difference]: Finished difference Result 711 states and 948 transitions. [2021-11-23 17:18:49,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:18:49,538 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-23 17:18:49,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:49,541 INFO L225 Difference]: With dead ends: 711 [2021-11-23 17:18:49,541 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:18:49,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:18:49,542 INFO L933 BasicCegarLoop]: 791 mSDtfsCounter, 54 mSDsluCounter, 2710 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 3501 SdHoareTripleChecker+Invalid, 1628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1276 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:49,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 3501 Invalid, 1628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 351 Invalid, 0 Unknown, 1276 Unchecked, 0.4s Time] [2021-11-23 17:18:49,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:18:49,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:18:49,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3523654159869494) internal successors, (829), 634 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:49,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 829 transitions. [2021-11-23 17:18:49,556 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 829 transitions. Word has length 97 [2021-11-23 17:18:49,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:49,556 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 829 transitions. [2021-11-23 17:18:49,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:49,557 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 829 transitions. [2021-11-23 17:18:49,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 17:18:49,557 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:49,558 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:18:49,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-23 17:18:49,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:49,758 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:18:49,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:49,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1487727486, now seen corresponding path program 1 times [2021-11-23 17:18:49,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:49,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [167111057] [2021-11-23 17:18:49,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:49,759 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:49,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:49,761 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:49,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-23 17:18:50,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:50,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:18:50,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:51,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:18:51,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:51,134 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:51,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [167111057] [2021-11-23 17:18:51,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [167111057] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:51,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:51,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:18:51,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054960928] [2021-11-23 17:18:51,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:51,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:18:51,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:51,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:18:51,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:18:51,135 INFO L87 Difference]: Start difference. First operand 635 states and 829 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:51,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:51,641 INFO L93 Difference]: Finished difference Result 714 states and 950 transitions. [2021-11-23 17:18:51,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:18:51,642 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-23 17:18:51,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:51,644 INFO L225 Difference]: With dead ends: 714 [2021-11-23 17:18:51,644 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:18:51,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:18:51,645 INFO L933 BasicCegarLoop]: 790 mSDtfsCounter, 66 mSDsluCounter, 1072 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 1862 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:51,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 1862 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 649 Invalid, 0 Unknown, 54 Unchecked, 0.5s Time] [2021-11-23 17:18:51,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:18:51,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:18:51,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3507340946166395) internal successors, (828), 634 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:51,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 828 transitions. [2021-11-23 17:18:51,657 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 828 transitions. Word has length 97 [2021-11-23 17:18:51,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:51,657 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 828 transitions. [2021-11-23 17:18:51,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:51,657 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 828 transitions. [2021-11-23 17:18:51,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 17:18:51,658 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:51,658 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:18:51,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-23 17:18:51,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:51,859 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:18:51,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:51,859 INFO L85 PathProgramCache]: Analyzing trace with hash -2052103235, now seen corresponding path program 1 times [2021-11-23 17:18:51,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:51,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1969674054] [2021-11-23 17:18:51,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:51,860 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:51,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:51,861 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:51,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-23 17:18:52,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:52,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:18:52,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:53,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:18:53,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:53,144 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:53,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1969674054] [2021-11-23 17:18:53,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1969674054] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:53,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:53,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:18:53,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984340079] [2021-11-23 17:18:53,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:53,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:18:53,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:53,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:18:53,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:18:53,146 INFO L87 Difference]: Start difference. First operand 635 states and 828 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:53,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:53,466 INFO L93 Difference]: Finished difference Result 715 states and 950 transitions. [2021-11-23 17:18:53,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:18:53,466 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-23 17:18:53,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:53,469 INFO L225 Difference]: With dead ends: 715 [2021-11-23 17:18:53,469 INFO L226 Difference]: Without dead ends: 636 [2021-11-23 17:18:53,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:18:53,470 INFO L933 BasicCegarLoop]: 789 mSDtfsCounter, 75 mSDsluCounter, 1105 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 1894 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 369 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:53,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 1894 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 300 Invalid, 0 Unknown, 369 Unchecked, 0.3s Time] [2021-11-23 17:18:53,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-11-23 17:18:53,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 635. [2021-11-23 17:18:53,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3491027732463294) internal successors, (827), 634 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:53,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 827 transitions. [2021-11-23 17:18:53,483 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 827 transitions. Word has length 97 [2021-11-23 17:18:53,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:53,483 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 827 transitions. [2021-11-23 17:18:53,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:53,483 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 827 transitions. [2021-11-23 17:18:53,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 17:18:53,484 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:53,485 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:18:53,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-23 17:18:53,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:53,685 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:18:53,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:53,686 INFO L85 PathProgramCache]: Analyzing trace with hash -139906133, now seen corresponding path program 1 times [2021-11-23 17:18:53,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:53,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [548402309] [2021-11-23 17:18:53,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:53,686 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:53,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:53,687 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:53,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-23 17:18:53,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:53,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:18:53,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:55,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:18:55,039 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:55,039 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:55,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [548402309] [2021-11-23 17:18:55,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [548402309] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:55,039 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:55,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:18:55,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230237240] [2021-11-23 17:18:55,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:55,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:18:55,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:55,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:18:55,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:18:55,041 INFO L87 Difference]: Start difference. First operand 635 states and 827 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:55,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:55,547 INFO L93 Difference]: Finished difference Result 726 states and 962 transitions. [2021-11-23 17:18:55,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:18:55,547 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-23 17:18:55,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:55,550 INFO L225 Difference]: With dead ends: 726 [2021-11-23 17:18:55,550 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:18:55,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:18:55,551 INFO L933 BasicCegarLoop]: 792 mSDtfsCounter, 63 mSDsluCounter, 1081 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1873 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:55,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 1873 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 629 Invalid, 0 Unknown, 50 Unchecked, 0.5s Time] [2021-11-23 17:18:55,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:18:55,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:18:55,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3474714518760196) internal successors, (826), 634 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:55,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 826 transitions. [2021-11-23 17:18:55,565 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 826 transitions. Word has length 97 [2021-11-23 17:18:55,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:55,565 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 826 transitions. [2021-11-23 17:18:55,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:55,566 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 826 transitions. [2021-11-23 17:18:55,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 17:18:55,567 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:55,567 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:18:55,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-23 17:18:55,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:55,768 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:18:55,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:55,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1430230902, now seen corresponding path program 1 times [2021-11-23 17:18:55,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:55,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1526879745] [2021-11-23 17:18:55,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:55,769 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:55,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:55,771 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:55,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-23 17:18:56,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:56,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:18:56,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:57,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:18:57,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:57,084 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:57,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1526879745] [2021-11-23 17:18:57,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1526879745] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:57,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:57,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:18:57,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129969918] [2021-11-23 17:18:57,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:57,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:18:57,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:57,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:18:57,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:18:57,086 INFO L87 Difference]: Start difference. First operand 635 states and 826 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:57,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:57,406 INFO L93 Difference]: Finished difference Result 716 states and 949 transitions. [2021-11-23 17:18:57,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:18:57,406 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-23 17:18:57,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:57,409 INFO L225 Difference]: With dead ends: 716 [2021-11-23 17:18:57,409 INFO L226 Difference]: Without dead ends: 637 [2021-11-23 17:18:57,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:18:57,410 INFO L933 BasicCegarLoop]: 787 mSDtfsCounter, 75 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 1489 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:57,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 1489 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 298 Invalid, 0 Unknown, 56 Unchecked, 0.3s Time] [2021-11-23 17:18:57,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-11-23 17:18:57,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 635. [2021-11-23 17:18:57,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3458401305057097) internal successors, (825), 634 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:57,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 825 transitions. [2021-11-23 17:18:57,423 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 825 transitions. Word has length 97 [2021-11-23 17:18:57,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:57,423 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 825 transitions. [2021-11-23 17:18:57,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:57,423 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 825 transitions. [2021-11-23 17:18:57,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 17:18:57,424 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:57,424 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:18:57,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2021-11-23 17:18:57,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:57,631 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:18:57,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:57,631 INFO L85 PathProgramCache]: Analyzing trace with hash -952539292, now seen corresponding path program 1 times [2021-11-23 17:18:57,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:57,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [105596426] [2021-11-23 17:18:57,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:57,632 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:57,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:57,640 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:57,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-23 17:18:57,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:57,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:18:57,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:58,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:18:58,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:58,933 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:58,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [105596426] [2021-11-23 17:18:58,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [105596426] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:58,934 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:58,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:18:58,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561851833] [2021-11-23 17:18:58,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:58,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:18:58,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:58,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:18:58,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:18:58,936 INFO L87 Difference]: Start difference. First operand 635 states and 825 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:58,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:58,963 INFO L93 Difference]: Finished difference Result 727 states and 961 transitions. [2021-11-23 17:18:58,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:18:58,963 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-23 17:18:58,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:58,966 INFO L225 Difference]: With dead ends: 727 [2021-11-23 17:18:58,966 INFO L226 Difference]: Without dead ends: 636 [2021-11-23 17:18:58,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:18:58,967 INFO L933 BasicCegarLoop]: 791 mSDtfsCounter, 63 mSDsluCounter, 1535 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 2326 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 654 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:58,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 2326 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 654 Unchecked, 0.0s Time] [2021-11-23 17:18:58,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-11-23 17:18:58,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 635. [2021-11-23 17:18:58,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3442088091353996) internal successors, (824), 634 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:58,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 824 transitions. [2021-11-23 17:18:58,988 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 824 transitions. Word has length 97 [2021-11-23 17:18:58,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:58,989 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 824 transitions. [2021-11-23 17:18:58,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:58,989 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 824 transitions. [2021-11-23 17:18:58,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 17:18:58,991 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:58,991 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:18:59,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-23 17:18:59,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:59,192 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:18:59,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:59,193 INFO L85 PathProgramCache]: Analyzing trace with hash -557790964, now seen corresponding path program 1 times [2021-11-23 17:18:59,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:59,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [289809432] [2021-11-23 17:18:59,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:59,194 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:59,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:59,195 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:59,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-23 17:18:59,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:59,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:18:59,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:00,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:19:00,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:19:00,499 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:19:00,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [289809432] [2021-11-23 17:19:00,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [289809432] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:19:00,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:19:00,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:19:00,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377776844] [2021-11-23 17:19:00,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:19:00,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:19:00,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:19:00,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:19:00,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:19:00,502 INFO L87 Difference]: Start difference. First operand 635 states and 824 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:00,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:19:00,821 INFO L93 Difference]: Finished difference Result 749 states and 987 transitions. [2021-11-23 17:19:00,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:19:00,821 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-23 17:19:00,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:19:00,824 INFO L225 Difference]: With dead ends: 749 [2021-11-23 17:19:00,824 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:19:00,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:19:00,825 INFO L933 BasicCegarLoop]: 793 mSDtfsCounter, 75 mSDsluCounter, 1088 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 1881 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 351 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:19:00,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 1881 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 304 Invalid, 0 Unknown, 351 Unchecked, 0.3s Time] [2021-11-23 17:19:00,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:19:00,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:19:00,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3425774877650898) internal successors, (823), 634 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:00,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 823 transitions. [2021-11-23 17:19:00,841 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 823 transitions. Word has length 97 [2021-11-23 17:19:00,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:19:00,841 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 823 transitions. [2021-11-23 17:19:00,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:00,841 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 823 transitions. [2021-11-23 17:19:00,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 17:19:00,842 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:19:00,842 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:19:00,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-23 17:19:01,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:19:01,043 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:19:01,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:19:01,043 INFO L85 PathProgramCache]: Analyzing trace with hash 934856710, now seen corresponding path program 1 times [2021-11-23 17:19:01,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:19:01,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1754446968] [2021-11-23 17:19:01,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:19:01,044 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:19:01,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:19:01,045 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:19:01,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-23 17:19:01,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:19:01,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:19:01,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:02,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:19:02,304 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:19:02,304 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:19:02,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1754446968] [2021-11-23 17:19:02,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1754446968] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:19:02,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:19:02,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:19:02,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891817028] [2021-11-23 17:19:02,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:19:02,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:19:02,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:19:02,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:19:02,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:19:02,306 INFO L87 Difference]: Start difference. First operand 635 states and 823 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:02,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:19:02,601 INFO L93 Difference]: Finished difference Result 709 states and 939 transitions. [2021-11-23 17:19:02,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:19:02,602 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-23 17:19:02,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:19:02,604 INFO L225 Difference]: With dead ends: 709 [2021-11-23 17:19:02,604 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:19:02,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:19:02,605 INFO L933 BasicCegarLoop]: 784 mSDtfsCounter, 77 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 1486 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:19:02,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 1486 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 295 Invalid, 0 Unknown, 54 Unchecked, 0.3s Time] [2021-11-23 17:19:02,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:19:02,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:19:02,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3409461663947797) internal successors, (822), 634 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:02,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 822 transitions. [2021-11-23 17:19:02,616 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 822 transitions. Word has length 97 [2021-11-23 17:19:02,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:19:02,616 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 822 transitions. [2021-11-23 17:19:02,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:02,617 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 822 transitions. [2021-11-23 17:19:02,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 17:19:02,617 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:19:02,618 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:19:02,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2021-11-23 17:19:02,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:19:02,818 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:19:02,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:19:02,819 INFO L85 PathProgramCache]: Analyzing trace with hash -965955861, now seen corresponding path program 1 times [2021-11-23 17:19:02,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:19:02,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1067358167] [2021-11-23 17:19:02,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:19:02,820 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:19:02,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:19:02,821 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:19:02,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-23 17:19:03,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:19:03,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:19:03,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:04,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:19:04,043 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:19:04,043 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:19:04,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1067358167] [2021-11-23 17:19:04,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1067358167] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:19:04,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:19:04,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:19:04,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336996350] [2021-11-23 17:19:04,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:19:04,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:19:04,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:19:04,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:19:04,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:19:04,045 INFO L87 Difference]: Start difference. First operand 635 states and 822 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:04,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:19:04,069 INFO L93 Difference]: Finished difference Result 711 states and 940 transitions. [2021-11-23 17:19:04,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:19:04,070 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-23 17:19:04,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:19:04,073 INFO L225 Difference]: With dead ends: 711 [2021-11-23 17:19:04,073 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:19:04,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:19:04,075 INFO L933 BasicCegarLoop]: 784 mSDtfsCounter, 53 mSDsluCounter, 2352 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 3136 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1242 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:19:04,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 3136 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 1242 Unchecked, 0.0s Time] [2021-11-23 17:19:04,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:19:04,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:19:04,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3393148450244698) internal successors, (821), 634 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:04,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 821 transitions. [2021-11-23 17:19:04,089 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 821 transitions. Word has length 97 [2021-11-23 17:19:04,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:19:04,089 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 821 transitions. [2021-11-23 17:19:04,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:04,089 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 821 transitions. [2021-11-23 17:19:04,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 17:19:04,090 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:19:04,090 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:19:04,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-23 17:19:04,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:19:04,291 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:19:04,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:19:04,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1614649937, now seen corresponding path program 1 times [2021-11-23 17:19:04,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:19:04,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1510087846] [2021-11-23 17:19:04,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:19:04,292 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:19:04,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:19:04,293 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:19:04,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-23 17:19:04,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:19:04,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:19:04,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:05,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:19:05,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:19:05,777 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:19:05,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1510087846] [2021-11-23 17:19:05,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1510087846] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:19:05,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:19:05,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:19:05,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046124234] [2021-11-23 17:19:05,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:19:05,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:19:05,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:19:05,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:19:05,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:19:05,780 INFO L87 Difference]: Start difference. First operand 635 states and 821 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:06,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:19:06,328 INFO L93 Difference]: Finished difference Result 711 states and 939 transitions. [2021-11-23 17:19:06,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:19:06,329 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-23 17:19:06,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:19:06,332 INFO L225 Difference]: With dead ends: 711 [2021-11-23 17:19:06,333 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:19:06,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:19:06,334 INFO L933 BasicCegarLoop]: 782 mSDtfsCounter, 54 mSDsluCounter, 2324 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 3106 SdHoareTripleChecker+Invalid, 1566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 932 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:19:06,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 3106 Invalid, 1566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 633 Invalid, 0 Unknown, 932 Unchecked, 0.5s Time] [2021-11-23 17:19:06,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:19:06,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:19:06,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3376835236541598) internal successors, (820), 634 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:06,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 820 transitions. [2021-11-23 17:19:06,351 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 820 transitions. Word has length 97 [2021-11-23 17:19:06,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:19:06,352 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 820 transitions. [2021-11-23 17:19:06,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:06,352 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 820 transitions. [2021-11-23 17:19:06,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 17:19:06,354 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:19:06,354 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:19:06,363 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2021-11-23 17:19:06,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:19:06,559 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:19:06,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:19:06,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1414714454, now seen corresponding path program 1 times [2021-11-23 17:19:06,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:19:06,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1998826981] [2021-11-23 17:19:06,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:19:06,561 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:19:06,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:19:06,562 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:19:06,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-23 17:19:06,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:19:06,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:19:06,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:07,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:19:07,978 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:19:07,978 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:19:07,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1998826981] [2021-11-23 17:19:07,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1998826981] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:19:07,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:19:07,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:19:07,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643545393] [2021-11-23 17:19:07,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:19:07,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:19:07,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:19:07,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:19:07,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:19:07,983 INFO L87 Difference]: Start difference. First operand 635 states and 820 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:08,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:19:08,325 INFO L93 Difference]: Finished difference Result 640 states and 824 transitions. [2021-11-23 17:19:08,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:19:08,326 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-23 17:19:08,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:19:08,329 INFO L225 Difference]: With dead ends: 640 [2021-11-23 17:19:08,329 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:19:08,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:19:08,330 INFO L933 BasicCegarLoop]: 781 mSDtfsCounter, 75 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 1483 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:19:08,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 1483 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 292 Invalid, 0 Unknown, 54 Unchecked, 0.3s Time] [2021-11-23 17:19:08,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:19:08,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:19:08,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.33605220228385) internal successors, (819), 634 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:08,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 819 transitions. [2021-11-23 17:19:08,351 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 819 transitions. Word has length 97 [2021-11-23 17:19:08,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:19:08,352 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 819 transitions. [2021-11-23 17:19:08,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:08,352 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 819 transitions. [2021-11-23 17:19:08,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 17:19:08,354 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:19:08,354 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:19:08,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-23 17:19:08,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:19:08,569 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:19:08,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:19:08,570 INFO L85 PathProgramCache]: Analyzing trace with hash 610975350, now seen corresponding path program 1 times [2021-11-23 17:19:08,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:19:08,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [793515404] [2021-11-23 17:19:08,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:19:08,571 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:19:08,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:19:08,572 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:19:08,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-23 17:19:08,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:19:08,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:19:08,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:09,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:19:09,943 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:19:09,944 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:19:09,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [793515404] [2021-11-23 17:19:09,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [793515404] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:19:09,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:19:09,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:19:09,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144262861] [2021-11-23 17:19:09,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:19:09,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:19:09,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:19:09,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:19:09,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:19:09,946 INFO L87 Difference]: Start difference. First operand 635 states and 819 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:10,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:19:10,309 INFO L93 Difference]: Finished difference Result 641 states and 824 transitions. [2021-11-23 17:19:10,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:19:10,309 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-23 17:19:10,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:19:10,311 INFO L225 Difference]: With dead ends: 641 [2021-11-23 17:19:10,311 INFO L226 Difference]: Without dead ends: 636 [2021-11-23 17:19:10,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:19:10,312 INFO L933 BasicCegarLoop]: 780 mSDtfsCounter, 66 mSDsluCounter, 2305 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 3085 SdHoareTripleChecker+Invalid, 1284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 943 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:19:10,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 3085 Invalid, 1284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 340 Invalid, 0 Unknown, 943 Unchecked, 0.3s Time] [2021-11-23 17:19:10,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-11-23 17:19:10,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 635. [2021-11-23 17:19:10,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.33442088091354) internal successors, (818), 634 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:10,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 818 transitions. [2021-11-23 17:19:10,330 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 818 transitions. Word has length 97 [2021-11-23 17:19:10,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:19:10,330 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 818 transitions. [2021-11-23 17:19:10,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:10,331 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 818 transitions. [2021-11-23 17:19:10,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 17:19:10,332 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:19:10,332 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:19:10,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-11-23 17:19:10,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:19:10,539 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:19:10,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:19:10,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1771794844, now seen corresponding path program 1 times [2021-11-23 17:19:10,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:19:10,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [31948057] [2021-11-23 17:19:10,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:19:10,540 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:19:10,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:19:10,541 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:19:10,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-23 17:19:10,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:19:10,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:19:10,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:11,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:19:11,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:19:11,978 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:19:11,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [31948057] [2021-11-23 17:19:11,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [31948057] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:19:11,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:19:11,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:19:11,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750421232] [2021-11-23 17:19:11,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:19:11,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:19:11,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:19:11,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:19:11,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:19:11,979 INFO L87 Difference]: Start difference. First operand 635 states and 818 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:12,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:19:12,498 INFO L93 Difference]: Finished difference Result 652 states and 836 transitions. [2021-11-23 17:19:12,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:19:12,499 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-23 17:19:12,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:19:12,500 INFO L225 Difference]: With dead ends: 652 [2021-11-23 17:19:12,500 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:19:12,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:19:12,501 INFO L933 BasicCegarLoop]: 783 mSDtfsCounter, 54 mSDsluCounter, 2760 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 3543 SdHoareTripleChecker+Invalid, 1843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1231 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:19:12,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 3543 Invalid, 1843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 611 Invalid, 0 Unknown, 1231 Unchecked, 0.5s Time] [2021-11-23 17:19:12,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:19:12,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:19:12,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.33278955954323) internal successors, (817), 634 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:12,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 817 transitions. [2021-11-23 17:19:12,514 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 817 transitions. Word has length 97 [2021-11-23 17:19:12,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:19:12,514 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 817 transitions. [2021-11-23 17:19:12,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:12,514 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 817 transitions. [2021-11-23 17:19:12,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 17:19:12,515 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:19:12,515 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:19:12,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-11-23 17:19:12,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:19:12,719 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:19:12,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:19:12,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1121558854, now seen corresponding path program 1 times [2021-11-23 17:19:12,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:19:12,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [421095199] [2021-11-23 17:19:12,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:19:12,720 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:19:12,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:19:12,721 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:19:12,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-23 17:19:12,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:19:12,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:19:12,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:14,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:19:14,089 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:19:14,089 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:19:14,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [421095199] [2021-11-23 17:19:14,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [421095199] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:19:14,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:19:14,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:19:14,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830239023] [2021-11-23 17:19:14,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:19:14,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:19:14,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:19:14,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:19:14,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:19:14,091 INFO L87 Difference]: Start difference. First operand 635 states and 817 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:14,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:19:14,462 INFO L93 Difference]: Finished difference Result 711 states and 935 transitions. [2021-11-23 17:19:14,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:19:14,463 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-23 17:19:14,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:19:14,464 INFO L225 Difference]: With dead ends: 711 [2021-11-23 17:19:14,464 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:19:14,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:19:14,465 INFO L933 BasicCegarLoop]: 778 mSDtfsCounter, 54 mSDsluCounter, 2724 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 3502 SdHoareTripleChecker+Invalid, 1562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1223 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:19:14,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 3502 Invalid, 1562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 338 Invalid, 0 Unknown, 1223 Unchecked, 0.3s Time] [2021-11-23 17:19:14,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:19:14,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:19:14,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3311582381729201) internal successors, (816), 634 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:14,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 816 transitions. [2021-11-23 17:19:14,482 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 816 transitions. Word has length 97 [2021-11-23 17:19:14,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:19:14,483 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 816 transitions. [2021-11-23 17:19:14,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:14,483 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 816 transitions. [2021-11-23 17:19:14,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 17:19:14,485 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:19:14,485 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:19:14,506 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (46)] Ended with exit code 0 [2021-11-23 17:19:14,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:19:14,698 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:19:14,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:19:14,698 INFO L85 PathProgramCache]: Analyzing trace with hash -144161225, now seen corresponding path program 1 times [2021-11-23 17:19:14,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:19:14,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1802283733] [2021-11-23 17:19:14,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:19:14,699 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:19:14,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:19:14,700 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:19:14,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-23 17:19:14,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:19:14,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:19:14,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:16,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:19:16,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:19:16,113 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:19:16,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1802283733] [2021-11-23 17:19:16,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1802283733] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:19:16,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:19:16,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:19:16,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595412922] [2021-11-23 17:19:16,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:19:16,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:19:16,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:19:16,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:19:16,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:19:16,115 INFO L87 Difference]: Start difference. First operand 635 states and 816 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:16,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:19:16,446 INFO L93 Difference]: Finished difference Result 640 states and 820 transitions. [2021-11-23 17:19:16,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:19:16,447 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-23 17:19:16,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:19:16,448 INFO L225 Difference]: With dead ends: 640 [2021-11-23 17:19:16,448 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:19:16,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:19:16,449 INFO L933 BasicCegarLoop]: 777 mSDtfsCounter, 75 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 1479 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:19:16,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 1479 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 288 Invalid, 0 Unknown, 54 Unchecked, 0.3s Time] [2021-11-23 17:19:16,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:19:16,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:19:16,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.32952691680261) internal successors, (815), 634 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:16,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 815 transitions. [2021-11-23 17:19:16,464 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 815 transitions. Word has length 97 [2021-11-23 17:19:16,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:19:16,464 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 815 transitions. [2021-11-23 17:19:16,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:16,464 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 815 transitions. [2021-11-23 17:19:16,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 17:19:16,465 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:19:16,465 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:19:16,474 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2021-11-23 17:19:16,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:19:16,666 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:19:16,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:19:16,666 INFO L85 PathProgramCache]: Analyzing trace with hash -941278081, now seen corresponding path program 1 times [2021-11-23 17:19:16,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:19:16,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1610811439] [2021-11-23 17:19:16,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:19:16,667 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:19:16,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:19:16,668 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:19:16,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-23 17:19:16,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:19:16,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:19:16,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:18,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:19:18,063 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:19:18,064 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:19:18,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1610811439] [2021-11-23 17:19:18,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1610811439] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:19:18,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:19:18,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:19:18,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330520200] [2021-11-23 17:19:18,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:19:18,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:19:18,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:19:18,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:19:18,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:19:18,065 INFO L87 Difference]: Start difference. First operand 635 states and 815 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:18,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:19:18,538 INFO L93 Difference]: Finished difference Result 711 states and 933 transitions. [2021-11-23 17:19:18,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:19:18,538 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-23 17:19:18,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:19:18,539 INFO L225 Difference]: With dead ends: 711 [2021-11-23 17:19:18,540 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:19:18,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:19:18,540 INFO L933 BasicCegarLoop]: 776 mSDtfsCounter, 67 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2265 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 341 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:19:18,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 2265 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 621 Invalid, 0 Unknown, 341 Unchecked, 0.4s Time] [2021-11-23 17:19:18,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:19:18,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:19:18,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3278955954323002) internal successors, (814), 634 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:18,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 814 transitions. [2021-11-23 17:19:18,566 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 814 transitions. Word has length 97 [2021-11-23 17:19:18,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:19:18,566 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 814 transitions. [2021-11-23 17:19:18,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:18,567 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 814 transitions. [2021-11-23 17:19:18,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 17:19:18,567 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:19:18,568 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:19:18,577 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (48)] Ended with exit code 0 [2021-11-23 17:19:18,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:19:18,768 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:19:18,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:19:18,769 INFO L85 PathProgramCache]: Analyzing trace with hash 2088565929, now seen corresponding path program 1 times [2021-11-23 17:19:18,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:19:18,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [435375311] [2021-11-23 17:19:18,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:19:18,769 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:19:18,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:19:18,770 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:19:18,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-11-23 17:19:19,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:19:19,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:19:19,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:20,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:19:20,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:19:20,128 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:19:20,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [435375311] [2021-11-23 17:19:20,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [435375311] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:19:20,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:19:20,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:19:20,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229971052] [2021-11-23 17:19:20,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:19:20,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:19:20,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:19:20,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:19:20,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:19:20,130 INFO L87 Difference]: Start difference. First operand 635 states and 814 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:20,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:19:20,536 INFO L93 Difference]: Finished difference Result 714 states and 935 transitions. [2021-11-23 17:19:20,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:19:20,536 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-23 17:19:20,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:19:20,537 INFO L225 Difference]: With dead ends: 714 [2021-11-23 17:19:20,537 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:19:20,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:19:20,543 INFO L933 BasicCegarLoop]: 775 mSDtfsCounter, 66 mSDsluCounter, 1902 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 2677 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 627 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:19:20,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 2677 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 335 Invalid, 0 Unknown, 627 Unchecked, 0.4s Time] [2021-11-23 17:19:20,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:19:20,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:19:20,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3262642740619903) internal successors, (813), 634 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:20,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 813 transitions. [2021-11-23 17:19:20,569 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 813 transitions. Word has length 97 [2021-11-23 17:19:20,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:19:20,569 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 813 transitions. [2021-11-23 17:19:20,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:20,569 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 813 transitions. [2021-11-23 17:19:20,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 17:19:20,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:19:20,571 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:19:20,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2021-11-23 17:19:20,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:19:20,771 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:19:20,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:19:20,772 INFO L85 PathProgramCache]: Analyzing trace with hash -292584005, now seen corresponding path program 1 times [2021-11-23 17:19:20,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:19:20,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1755880121] [2021-11-23 17:19:20,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:19:20,772 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:19:20,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:19:20,773 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:19:20,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-11-23 17:19:21,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:19:21,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:19:21,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:22,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:19:22,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:19:22,072 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:19:22,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1755880121] [2021-11-23 17:19:22,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1755880121] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:19:22,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:19:22,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:19:22,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390129951] [2021-11-23 17:19:22,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:19:22,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:19:22,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:19:22,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:19:22,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:19:22,073 INFO L87 Difference]: Start difference. First operand 635 states and 813 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:22,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:19:22,339 INFO L93 Difference]: Finished difference Result 711 states and 931 transitions. [2021-11-23 17:19:22,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:19:22,340 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-23 17:19:22,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:19:22,341 INFO L225 Difference]: With dead ends: 711 [2021-11-23 17:19:22,341 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:19:22,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:19:22,341 INFO L933 BasicCegarLoop]: 774 mSDtfsCounter, 76 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 1476 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:19:22,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 1476 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 285 Invalid, 0 Unknown, 54 Unchecked, 0.2s Time] [2021-11-23 17:19:22,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:19:22,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:19:22,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3246329526916802) internal successors, (812), 634 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:22,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 812 transitions. [2021-11-23 17:19:22,352 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 812 transitions. Word has length 97 [2021-11-23 17:19:22,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:19:22,353 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 812 transitions. [2021-11-23 17:19:22,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:22,353 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 812 transitions. [2021-11-23 17:19:22,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 17:19:22,354 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:19:22,355 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:19:22,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (50)] Ended with exit code 0 [2021-11-23 17:19:22,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:19:22,567 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:19:22,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:19:22,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1284826825, now seen corresponding path program 1 times [2021-11-23 17:19:22,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:19:22,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1729327953] [2021-11-23 17:19:22,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:19:22,568 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:19:22,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:19:22,569 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:19:22,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-11-23 17:19:22,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:19:22,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:19:22,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:24,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:19:24,000 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:19:24,000 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:19:24,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1729327953] [2021-11-23 17:19:24,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1729327953] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:19:24,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:19:24,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:19:24,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341297931] [2021-11-23 17:19:24,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:19:24,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:19:24,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:19:24,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:19:24,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:19:24,002 INFO L87 Difference]: Start difference. First operand 635 states and 812 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:24,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:19:24,538 INFO L93 Difference]: Finished difference Result 715 states and 934 transitions. [2021-11-23 17:19:24,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:19:24,539 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-23 17:19:24,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:19:24,544 INFO L225 Difference]: With dead ends: 715 [2021-11-23 17:19:24,544 INFO L226 Difference]: Without dead ends: 636 [2021-11-23 17:19:24,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:19:24,545 INFO L933 BasicCegarLoop]: 773 mSDtfsCounter, 66 mSDsluCounter, 1488 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 2261 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 340 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:19:24,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 2261 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 615 Invalid, 0 Unknown, 340 Unchecked, 0.5s Time] [2021-11-23 17:19:24,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-11-23 17:19:24,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 635. [2021-11-23 17:19:24,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3230016313213704) internal successors, (811), 634 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:24,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 811 transitions. [2021-11-23 17:19:24,560 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 811 transitions. Word has length 97 [2021-11-23 17:19:24,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:19:24,560 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 811 transitions. [2021-11-23 17:19:24,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:24,560 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 811 transitions. [2021-11-23 17:19:24,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 17:19:24,561 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:19:24,562 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:19:24,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (51)] Ended with exit code 0 [2021-11-23 17:19:24,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:19:24,766 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:19:24,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:19:24,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1097943369, now seen corresponding path program 1 times [2021-11-23 17:19:24,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:19:24,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1424318846] [2021-11-23 17:19:24,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:19:24,767 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:19:24,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:19:24,768 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:19:24,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-11-23 17:19:25,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:19:25,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:19:25,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:26,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:19:26,131 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:19:26,131 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:19:26,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1424318846] [2021-11-23 17:19:26,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1424318846] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:19:26,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:19:26,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:19:26,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589874301] [2021-11-23 17:19:26,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:19:26,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:19:26,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:19:26,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:19:26,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:19:26,133 INFO L87 Difference]: Start difference. First operand 635 states and 811 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:26,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:19:26,449 INFO L93 Difference]: Finished difference Result 726 states and 946 transitions. [2021-11-23 17:19:26,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:19:26,450 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-23 17:19:26,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:19:26,451 INFO L225 Difference]: With dead ends: 726 [2021-11-23 17:19:26,451 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:19:26,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:19:26,452 INFO L933 BasicCegarLoop]: 776 mSDtfsCounter, 75 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 1459 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:19:26,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 1459 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 287 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2021-11-23 17:19:26,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:19:26,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:19:26,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3213703099510603) internal successors, (810), 634 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:26,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 810 transitions. [2021-11-23 17:19:26,465 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 810 transitions. Word has length 97 [2021-11-23 17:19:26,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:19:26,465 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 810 transitions. [2021-11-23 17:19:26,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:26,465 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 810 transitions. [2021-11-23 17:19:26,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 17:19:26,467 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:19:26,467 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:19:26,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2021-11-23 17:19:26,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:19:26,667 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:19:26,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:19:26,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1794930710, now seen corresponding path program 1 times [2021-11-23 17:19:26,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:19:26,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1894845596] [2021-11-23 17:19:26,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:19:26,668 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:19:26,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:19:26,669 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:19:26,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2021-11-23 17:19:26,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:19:26,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:19:26,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:27,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:19:27,962 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:19:27,962 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:19:27,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1894845596] [2021-11-23 17:19:27,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1894845596] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:19:27,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:19:27,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:19:27,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058087852] [2021-11-23 17:19:27,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:19:27,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:19:27,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:19:27,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:19:27,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:19:27,964 INFO L87 Difference]: Start difference. First operand 635 states and 810 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:27,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:19:27,990 INFO L93 Difference]: Finished difference Result 711 states and 928 transitions. [2021-11-23 17:19:27,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:19:27,990 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-23 17:19:27,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:19:27,991 INFO L225 Difference]: With dead ends: 711 [2021-11-23 17:19:27,992 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:19:27,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:19:27,993 INFO L933 BasicCegarLoop]: 772 mSDtfsCounter, 54 mSDsluCounter, 2365 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 3137 SdHoareTripleChecker+Invalid, 1199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1196 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:19:27,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 3137 Invalid, 1199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 1196 Unchecked, 0.0s Time] [2021-11-23 17:19:27,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:19:28,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:19:28,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3197389885807504) internal successors, (809), 634 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:28,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 809 transitions. [2021-11-23 17:19:28,005 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 809 transitions. Word has length 97 [2021-11-23 17:19:28,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:19:28,005 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 809 transitions. [2021-11-23 17:19:28,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:28,005 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 809 transitions. [2021-11-23 17:19:28,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 17:19:28,006 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:19:28,007 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:19:28,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2021-11-23 17:19:28,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:19:28,207 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:19:28,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:19:28,208 INFO L85 PathProgramCache]: Analyzing trace with hash 529690250, now seen corresponding path program 1 times [2021-11-23 17:19:28,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:19:28,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1885147260] [2021-11-23 17:19:28,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:19:28,208 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:19:28,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:19:28,209 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:19:28,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-11-23 17:19:28,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:19:28,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:19:28,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:29,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:19:29,491 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:19:29,492 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:19:29,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1885147260] [2021-11-23 17:19:29,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1885147260] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:19:29,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:19:29,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:19:29,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060943147] [2021-11-23 17:19:29,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:19:29,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:19:29,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:19:29,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:19:29,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:19:29,493 INFO L87 Difference]: Start difference. First operand 635 states and 809 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:29,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:19:29,995 INFO L93 Difference]: Finished difference Result 714 states and 930 transitions. [2021-11-23 17:19:29,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:19:29,995 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-23 17:19:29,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:19:29,996 INFO L225 Difference]: With dead ends: 714 [2021-11-23 17:19:29,996 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:19:29,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:19:29,997 INFO L933 BasicCegarLoop]: 770 mSDtfsCounter, 66 mSDsluCounter, 1892 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 2662 SdHoareTripleChecker+Invalid, 1240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 630 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:19:29,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 2662 Invalid, 1240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 609 Invalid, 0 Unknown, 630 Unchecked, 0.5s Time] [2021-11-23 17:19:29,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:19:30,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:19:30,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3181076672104404) internal successors, (808), 634 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:30,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 808 transitions. [2021-11-23 17:19:30,009 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 808 transitions. Word has length 97 [2021-11-23 17:19:30,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:19:30,010 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 808 transitions. [2021-11-23 17:19:30,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:30,010 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 808 transitions. [2021-11-23 17:19:30,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 17:19:30,012 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:19:30,012 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:19:30,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2021-11-23 17:19:30,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:19:30,226 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:19:30,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:19:30,227 INFO L85 PathProgramCache]: Analyzing trace with hash 67880146, now seen corresponding path program 1 times [2021-11-23 17:19:30,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:19:30,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [574757819] [2021-11-23 17:19:30,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:19:30,228 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:19:30,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:19:30,229 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:19:30,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-11-23 17:19:30,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:19:30,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:19:30,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:31,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:19:31,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:19:31,451 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:19:31,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [574757819] [2021-11-23 17:19:31,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [574757819] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:19:31,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:19:31,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:19:31,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029106090] [2021-11-23 17:19:31,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:19:31,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:19:31,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:19:31,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:19:31,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:19:31,454 INFO L87 Difference]: Start difference. First operand 635 states and 808 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:31,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:19:31,763 INFO L93 Difference]: Finished difference Result 709 states and 924 transitions. [2021-11-23 17:19:31,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:19:31,763 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-23 17:19:31,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:19:31,764 INFO L225 Difference]: With dead ends: 709 [2021-11-23 17:19:31,764 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:19:31,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:19:31,765 INFO L933 BasicCegarLoop]: 769 mSDtfsCounter, 77 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 1471 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:19:31,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 1471 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 280 Invalid, 0 Unknown, 54 Unchecked, 0.3s Time] [2021-11-23 17:19:31,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:19:31,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:19:31,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3164763458401305) internal successors, (807), 634 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:31,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 807 transitions. [2021-11-23 17:19:31,782 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 807 transitions. Word has length 97 [2021-11-23 17:19:31,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:19:31,783 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 807 transitions. [2021-11-23 17:19:31,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:31,783 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 807 transitions. [2021-11-23 17:19:31,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 17:19:31,785 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:19:31,785 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:19:31,801 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (55)] Ended with exit code 0 [2021-11-23 17:19:31,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:19:31,998 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:19:31,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:19:31,998 INFO L85 PathProgramCache]: Analyzing trace with hash 387783958, now seen corresponding path program 1 times [2021-11-23 17:19:31,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:19:31,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [778093959] [2021-11-23 17:19:31,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:19:31,999 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:19:31,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:19:32,000 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:19:32,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2021-11-23 17:19:32,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:19:32,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:19:32,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:33,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:19:33,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:19:33,224 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:19:33,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [778093959] [2021-11-23 17:19:33,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [778093959] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:19:33,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:19:33,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:19:33,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925903985] [2021-11-23 17:19:33,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:19:33,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:19:33,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:19:33,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:19:33,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:19:33,226 INFO L87 Difference]: Start difference. First operand 635 states and 807 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:33,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:19:33,733 INFO L93 Difference]: Finished difference Result 711 states and 925 transitions. [2021-11-23 17:19:33,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:19:33,733 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-23 17:19:33,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:19:33,735 INFO L225 Difference]: With dead ends: 711 [2021-11-23 17:19:33,735 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:19:33,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:19:33,735 INFO L933 BasicCegarLoop]: 768 mSDtfsCounter, 54 mSDsluCounter, 2727 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 3495 SdHoareTripleChecker+Invalid, 1789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1183 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:19:33,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 3495 Invalid, 1789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 605 Invalid, 0 Unknown, 1183 Unchecked, 0.5s Time] [2021-11-23 17:19:33,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:19:33,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:19:33,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3148450244698207) internal successors, (806), 634 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:33,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 806 transitions. [2021-11-23 17:19:33,748 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 806 transitions. Word has length 97 [2021-11-23 17:19:33,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:19:33,748 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 806 transitions. [2021-11-23 17:19:33,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:33,748 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 806 transitions. [2021-11-23 17:19:33,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 17:19:33,749 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:19:33,749 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:19:33,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (56)] Ended with exit code 0 [2021-11-23 17:19:33,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:19:33,950 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:19:33,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:19:33,951 INFO L85 PathProgramCache]: Analyzing trace with hash 2055269860, now seen corresponding path program 1 times [2021-11-23 17:19:33,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:19:33,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1567972517] [2021-11-23 17:19:33,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:19:33,952 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:19:33,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:19:33,953 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:19:33,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2021-11-23 17:19:34,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:19:34,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:19:34,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:35,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:19:35,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:19:35,324 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:19:35,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1567972517] [2021-11-23 17:19:35,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1567972517] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:19:35,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:19:35,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:19:35,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97203343] [2021-11-23 17:19:35,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:19:35,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:19:35,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:19:35,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:19:35,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:19:35,326 INFO L87 Difference]: Start difference. First operand 635 states and 806 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:35,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:19:35,621 INFO L93 Difference]: Finished difference Result 709 states and 922 transitions. [2021-11-23 17:19:35,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:19:35,622 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-23 17:19:35,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:19:35,623 INFO L225 Difference]: With dead ends: 709 [2021-11-23 17:19:35,623 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:19:35,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:19:35,624 INFO L933 BasicCegarLoop]: 767 mSDtfsCounter, 63 mSDsluCounter, 1121 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1888 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 330 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:19:35,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 1888 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 278 Invalid, 0 Unknown, 330 Unchecked, 0.3s Time] [2021-11-23 17:19:35,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:19:35,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:19:35,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3132137030995106) internal successors, (805), 634 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:35,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 805 transitions. [2021-11-23 17:19:35,635 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 805 transitions. Word has length 97 [2021-11-23 17:19:35,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:19:35,635 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 805 transitions. [2021-11-23 17:19:35,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:35,635 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 805 transitions. [2021-11-23 17:19:35,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 17:19:35,636 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:19:35,636 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:19:35,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (57)] Ended with exit code 0 [2021-11-23 17:19:35,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:19:35,837 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:19:35,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:19:35,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1434790026, now seen corresponding path program 1 times [2021-11-23 17:19:35,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:19:35,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1340841242] [2021-11-23 17:19:35,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:19:35,839 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:19:35,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:19:35,840 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:19:35,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2021-11-23 17:19:36,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:19:36,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:19:36,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:37,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:19:37,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:19:37,326 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:19:37,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1340841242] [2021-11-23 17:19:37,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1340841242] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:19:37,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:19:37,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:19:37,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699382393] [2021-11-23 17:19:37,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:19:37,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:19:37,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:19:37,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:19:37,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:19:37,328 INFO L87 Difference]: Start difference. First operand 635 states and 805 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:37,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:19:37,757 INFO L93 Difference]: Finished difference Result 711 states and 923 transitions. [2021-11-23 17:19:37,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:19:37,757 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-23 17:19:37,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:19:37,758 INFO L225 Difference]: With dead ends: 711 [2021-11-23 17:19:37,759 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:19:37,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:19:37,759 INFO L933 BasicCegarLoop]: 766 mSDtfsCounter, 63 mSDsluCounter, 1954 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 2720 SdHoareTripleChecker+Invalid, 1162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 884 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:19:37,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 2720 Invalid, 1162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 277 Invalid, 0 Unknown, 884 Unchecked, 0.4s Time] [2021-11-23 17:19:37,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:19:37,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:19:37,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3115823817292007) internal successors, (804), 634 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:37,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 804 transitions. [2021-11-23 17:19:37,771 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 804 transitions. Word has length 97 [2021-11-23 17:19:37,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:19:37,771 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 804 transitions. [2021-11-23 17:19:37,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:37,771 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 804 transitions. [2021-11-23 17:19:37,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 17:19:37,772 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:19:37,772 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:19:37,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2021-11-23 17:19:37,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:19:37,973 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:19:37,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:19:37,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1595270458, now seen corresponding path program 1 times [2021-11-23 17:19:37,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:19:37,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1530734290] [2021-11-23 17:19:37,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:19:37,982 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:19:37,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:19:37,983 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:19:37,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2021-11-23 17:19:38,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:19:38,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:19:38,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:39,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:19:39,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:19:39,379 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:19:39,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1530734290] [2021-11-23 17:19:39,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1530734290] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:19:39,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:19:39,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:19:39,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743806679] [2021-11-23 17:19:39,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:19:39,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:19:39,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:19:39,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:19:39,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:19:39,381 INFO L87 Difference]: Start difference. First operand 635 states and 804 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:39,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:19:39,722 INFO L93 Difference]: Finished difference Result 640 states and 808 transitions. [2021-11-23 17:19:39,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:19:39,722 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-23 17:19:39,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:19:39,724 INFO L225 Difference]: With dead ends: 640 [2021-11-23 17:19:39,724 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:19:39,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:19:39,725 INFO L933 BasicCegarLoop]: 765 mSDtfsCounter, 75 mSDsluCounter, 1521 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 2286 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 621 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:19:39,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 2286 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 276 Invalid, 0 Unknown, 621 Unchecked, 0.3s Time] [2021-11-23 17:19:39,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:19:39,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:19:39,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3099510603588906) internal successors, (803), 634 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:39,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 803 transitions. [2021-11-23 17:19:39,737 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 803 transitions. Word has length 97 [2021-11-23 17:19:39,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:19:39,737 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 803 transitions. [2021-11-23 17:19:39,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:39,738 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 803 transitions. [2021-11-23 17:19:39,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 17:19:39,739 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:19:39,739 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:19:39,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2021-11-23 17:19:39,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:19:39,939 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:19:39,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:19:39,940 INFO L85 PathProgramCache]: Analyzing trace with hash -786095950, now seen corresponding path program 1 times [2021-11-23 17:19:39,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:19:39,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1114856326] [2021-11-23 17:19:39,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:19:39,941 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:19:39,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:19:39,942 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:19:39,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2021-11-23 17:19:40,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:19:40,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:19:40,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:41,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:19:41,384 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:19:41,384 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:19:41,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1114856326] [2021-11-23 17:19:41,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1114856326] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:19:41,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:19:41,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:19:41,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903631570] [2021-11-23 17:19:41,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:19:41,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:19:41,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:19:41,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:19:41,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:19:41,386 INFO L87 Difference]: Start difference. First operand 635 states and 803 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:41,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:19:41,716 INFO L93 Difference]: Finished difference Result 711 states and 921 transitions. [2021-11-23 17:19:41,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:19:41,716 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-23 17:19:41,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:19:41,718 INFO L225 Difference]: With dead ends: 711 [2021-11-23 17:19:41,718 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:19:41,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:19:41,720 INFO L933 BasicCegarLoop]: 764 mSDtfsCounter, 63 mSDsluCounter, 1121 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1885 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 327 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:19:41,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 1885 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 275 Invalid, 0 Unknown, 327 Unchecked, 0.3s Time] [2021-11-23 17:19:41,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:19:41,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:19:41,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3083197389885808) internal successors, (802), 634 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:41,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 802 transitions. [2021-11-23 17:19:41,733 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 802 transitions. Word has length 97 [2021-11-23 17:19:41,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:19:41,733 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 802 transitions. [2021-11-23 17:19:41,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:41,733 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 802 transitions. [2021-11-23 17:19:41,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 17:19:41,734 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:19:41,734 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:19:41,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2021-11-23 17:19:41,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:19:41,935 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:19:41,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:19:41,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1852246538, now seen corresponding path program 1 times [2021-11-23 17:19:41,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:19:41,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1783497161] [2021-11-23 17:19:41,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:19:41,936 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:19:41,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:19:41,937 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:19:41,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2021-11-23 17:19:42,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:19:42,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:19:42,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:43,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:19:43,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:19:43,315 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:19:43,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1783497161] [2021-11-23 17:19:43,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1783497161] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:19:43,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:19:43,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:19:43,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417939709] [2021-11-23 17:19:43,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:19:43,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:19:43,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:19:43,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:19:43,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:19:43,317 INFO L87 Difference]: Start difference. First operand 635 states and 802 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:43,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:19:43,707 INFO L93 Difference]: Finished difference Result 709 states and 918 transitions. [2021-11-23 17:19:43,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:19:43,708 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-23 17:19:43,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:19:43,709 INFO L225 Difference]: With dead ends: 709 [2021-11-23 17:19:43,709 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:19:43,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:19:43,710 INFO L933 BasicCegarLoop]: 763 mSDtfsCounter, 53 mSDsluCounter, 2726 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 3489 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1164 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:19:43,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 3489 Invalid, 1488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 323 Invalid, 0 Unknown, 1164 Unchecked, 0.4s Time] [2021-11-23 17:19:43,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:19:43,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:19:43,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3066884176182707) internal successors, (801), 634 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:43,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 801 transitions. [2021-11-23 17:19:43,722 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 801 transitions. Word has length 97 [2021-11-23 17:19:43,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:19:43,722 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 801 transitions. [2021-11-23 17:19:43,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:43,723 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 801 transitions. [2021-11-23 17:19:43,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-23 17:19:43,724 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:19:43,724 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:19:43,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (61)] Ended with exit code 0 [2021-11-23 17:19:43,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:19:43,924 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:19:43,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:19:43,925 INFO L85 PathProgramCache]: Analyzing trace with hash -785107352, now seen corresponding path program 1 times [2021-11-23 17:19:43,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:19:43,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1952817790] [2021-11-23 17:19:43,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:19:43,926 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:19:43,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:19:43,927 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:19:43,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2021-11-23 17:19:44,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:19:44,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:19:44,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:45,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:19:45,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:19:45,410 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:19:45,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1952817790] [2021-11-23 17:19:45,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1952817790] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:19:45,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:19:45,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:19:45,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607262704] [2021-11-23 17:19:45,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:19:45,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:19:45,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:19:45,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:19:45,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:19:45,411 INFO L87 Difference]: Start difference. First operand 635 states and 801 transitions. Second operand has 8 states, 8 states have (on average 12.25) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:45,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:19:45,808 INFO L93 Difference]: Finished difference Result 709 states and 917 transitions. [2021-11-23 17:19:45,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:19:45,809 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-23 17:19:45,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:19:45,810 INFO L225 Difference]: With dead ends: 709 [2021-11-23 17:19:45,810 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:19:45,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:19:45,811 INFO L933 BasicCegarLoop]: 762 mSDtfsCounter, 54 mSDsluCounter, 2309 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 3071 SdHoareTripleChecker+Invalid, 1208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 885 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:19:45,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 3071 Invalid, 1208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 322 Invalid, 0 Unknown, 885 Unchecked, 0.4s Time] [2021-11-23 17:19:45,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:19:45,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:19:45,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.3050570962479608) internal successors, (800), 634 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:45,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 800 transitions. [2021-11-23 17:19:45,823 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 800 transitions. Word has length 98 [2021-11-23 17:19:45,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:19:45,823 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 800 transitions. [2021-11-23 17:19:45,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:45,823 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 800 transitions. [2021-11-23 17:19:45,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-23 17:19:45,824 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:19:45,825 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:19:45,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (62)] Forceful destruction successful, exit code 0 [2021-11-23 17:19:46,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:19:46,025 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:19:46,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:19:46,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1897114906, now seen corresponding path program 1 times [2021-11-23 17:19:46,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:19:46,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1720983272] [2021-11-23 17:19:46,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:19:46,027 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:19:46,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:19:46,027 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:19:46,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2021-11-23 17:19:46,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:19:46,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:19:46,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:47,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:19:47,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:19:47,320 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:19:47,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1720983272] [2021-11-23 17:19:47,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1720983272] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:19:47,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:19:47,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:19:47,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955706137] [2021-11-23 17:19:47,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:19:47,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:19:47,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:19:47,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:19:47,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:19:47,322 INFO L87 Difference]: Start difference. First operand 635 states and 800 transitions. Second operand has 8 states, 8 states have (on average 12.25) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:47,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:19:47,653 INFO L93 Difference]: Finished difference Result 710 states and 917 transitions. [2021-11-23 17:19:47,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:19:47,653 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-23 17:19:47,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:19:47,654 INFO L225 Difference]: With dead ends: 710 [2021-11-23 17:19:47,655 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 17:19:47,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:19:47,655 INFO L933 BasicCegarLoop]: 761 mSDtfsCounter, 54 mSDsluCounter, 2722 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 3483 SdHoareTripleChecker+Invalid, 1478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1156 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:19:47,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 3483 Invalid, 1478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 321 Invalid, 0 Unknown, 1156 Unchecked, 0.3s Time] [2021-11-23 17:19:47,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 17:19:47,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 17:19:47,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 613 states have (on average 1.303425774877651) internal successors, (799), 634 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:47,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 799 transitions. [2021-11-23 17:19:47,668 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 799 transitions. Word has length 98 [2021-11-23 17:19:47,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:19:47,668 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 799 transitions. [2021-11-23 17:19:47,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:47,668 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 799 transitions. [2021-11-23 17:19:47,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-23 17:19:47,670 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:19:47,670 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:19:47,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2021-11-23 17:19:47,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:19:47,870 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:19:47,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:19:47,871 INFO L85 PathProgramCache]: Analyzing trace with hash -472216631, now seen corresponding path program 1 times [2021-11-23 17:19:47,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:19:47,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2130261550] [2021-11-23 17:19:47,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:19:47,871 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:19:47,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:19:47,872 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:19:47,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2021-11-23 17:19:48,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:19:48,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-23 17:19:48,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:56,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:19:56,581 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:19:56,581 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:19:56,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2130261550] [2021-11-23 17:19:56,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2130261550] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:19:56,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:19:56,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-11-23 17:19:56,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443419953] [2021-11-23 17:19:56,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:19:56,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-23 17:19:56,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:19:56,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-23 17:19:56,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=670, Unknown=0, NotChecked=0, Total=870 [2021-11-23 17:19:56,584 INFO L87 Difference]: Start difference. First operand 635 states and 799 transitions. Second operand has 30 states, 30 states have (on average 3.3) internal successors, (99), 30 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:56,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:19:56,847 INFO L93 Difference]: Finished difference Result 783 states and 1006 transitions. [2021-11-23 17:19:56,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-23 17:19:56,847 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.3) internal successors, (99), 30 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-11-23 17:19:56,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:19:56,849 INFO L225 Difference]: With dead ends: 783 [2021-11-23 17:19:56,849 INFO L226 Difference]: Without dead ends: 646 [2021-11-23 17:19:56,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=220, Invalid=710, Unknown=0, NotChecked=0, Total=930 [2021-11-23 17:19:56,849 INFO L933 BasicCegarLoop]: 753 mSDtfsCounter, 141 mSDsluCounter, 4469 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 5222 SdHoareTripleChecker+Invalid, 3157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3071 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:19:56,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 5222 Invalid, 3157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 82 Invalid, 0 Unknown, 3071 Unchecked, 0.1s Time] [2021-11-23 17:19:56,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-11-23 17:19:56,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 646. [2021-11-23 17:19:56,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 624 states have (on average 1.3012820512820513) internal successors, (812), 645 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:56,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 812 transitions. [2021-11-23 17:19:56,864 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 812 transitions. Word has length 99 [2021-11-23 17:19:56,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:19:56,864 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 812 transitions. [2021-11-23 17:19:56,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.3) internal successors, (99), 30 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:56,864 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 812 transitions. [2021-11-23 17:19:56,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-23 17:19:56,865 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:19:56,865 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:19:56,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (64)] Ended with exit code 0 [2021-11-23 17:19:57,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:19:57,071 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:19:57,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:19:57,071 INFO L85 PathProgramCache]: Analyzing trace with hash 134385077, now seen corresponding path program 1 times [2021-11-23 17:19:57,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:19:57,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [703587837] [2021-11-23 17:19:57,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:19:57,073 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:19:57,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:19:57,074 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:19:57,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2021-11-23 17:19:57,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:19:57,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-23 17:19:57,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:20:18,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:20:18,322 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:20:18,323 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:20:18,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [703587837] [2021-11-23 17:20:18,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [703587837] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:20:18,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:20:18,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-11-23 17:20:18,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849138938] [2021-11-23 17:20:18,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:20:18,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-23 17:20:18,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:20:18,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-23 17:20:18,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=914, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 17:20:18,326 INFO L87 Difference]: Start difference. First operand 646 states and 812 transitions. Second operand has 34 states, 34 states have (on average 2.911764705882353) internal successors, (99), 34 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:18,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:20:18,693 INFO L93 Difference]: Finished difference Result 747 states and 961 transitions. [2021-11-23 17:20:18,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-23 17:20:18,695 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.911764705882353) internal successors, (99), 34 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-11-23 17:20:18,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:20:18,697 INFO L225 Difference]: With dead ends: 747 [2021-11-23 17:20:18,697 INFO L226 Difference]: Without dead ends: 657 [2021-11-23 17:20:18,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=228, Invalid=962, Unknown=0, NotChecked=0, Total=1190 [2021-11-23 17:20:18,699 INFO L933 BasicCegarLoop]: 744 mSDtfsCounter, 140 mSDsluCounter, 6466 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 7210 SdHoareTripleChecker+Invalid, 4467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4349 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:20:18,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 7210 Invalid, 4467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 114 Invalid, 0 Unknown, 4349 Unchecked, 0.2s Time] [2021-11-23 17:20:18,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-11-23 17:20:18,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 657. [2021-11-23 17:20:18,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 635 states have (on average 1.300787401574803) internal successors, (826), 656 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:18,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 826 transitions. [2021-11-23 17:20:18,739 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 826 transitions. Word has length 99 [2021-11-23 17:20:18,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:20:18,740 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 826 transitions. [2021-11-23 17:20:18,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.911764705882353) internal successors, (99), 34 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:18,740 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 826 transitions. [2021-11-23 17:20:18,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-23 17:20:18,742 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:20:18,742 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:20:18,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2021-11-23 17:20:18,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:20:18,956 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:20:18,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:20:18,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1796136237, now seen corresponding path program 1 times [2021-11-23 17:20:18,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:20:18,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [937290909] [2021-11-23 17:20:18,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:20:18,957 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:20:18,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:20:18,958 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:20:18,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2021-11-23 17:20:19,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:20:19,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-23 17:20:19,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:20:29,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:20:29,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:20:29,595 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:20:29,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [937290909] [2021-11-23 17:20:29,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [937290909] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:20:29,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:20:29,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-11-23 17:20:29,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129084596] [2021-11-23 17:20:29,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:20:29,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-23 17:20:29,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:20:29,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-23 17:20:29,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2021-11-23 17:20:29,597 INFO L87 Difference]: Start difference. First operand 657 states and 826 transitions. Second operand has 31 states, 31 states have (on average 3.193548387096774) internal successors, (99), 31 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:30,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:20:30,379 INFO L93 Difference]: Finished difference Result 765 states and 983 transitions. [2021-11-23 17:20:30,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-23 17:20:30,380 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.193548387096774) internal successors, (99), 31 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-11-23 17:20:30,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:20:30,381 INFO L225 Difference]: With dead ends: 765 [2021-11-23 17:20:30,381 INFO L226 Difference]: Without dead ends: 658 [2021-11-23 17:20:30,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=205, Invalid=787, Unknown=0, NotChecked=0, Total=992 [2021-11-23 17:20:30,382 INFO L933 BasicCegarLoop]: 749 mSDtfsCounter, 110 mSDsluCounter, 6062 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 6811 SdHoareTripleChecker+Invalid, 4149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3743 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:20:30,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 6811 Invalid, 4149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 402 Invalid, 0 Unknown, 3743 Unchecked, 0.6s Time] [2021-11-23 17:20:30,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2021-11-23 17:20:30,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 658. [2021-11-23 17:20:30,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 636 states have (on average 1.300314465408805) internal successors, (827), 657 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:30,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 827 transitions. [2021-11-23 17:20:30,396 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 827 transitions. Word has length 99 [2021-11-23 17:20:30,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:20:30,396 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 827 transitions. [2021-11-23 17:20:30,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.193548387096774) internal successors, (99), 31 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:30,396 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 827 transitions. [2021-11-23 17:20:30,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-23 17:20:30,397 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:20:30,397 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:20:30,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2021-11-23 17:20:30,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:20:30,598 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:20:30,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:20:30,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1243357058, now seen corresponding path program 1 times [2021-11-23 17:20:30,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:20:30,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [382404573] [2021-11-23 17:20:30,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:20:30,599 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:20:30,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:20:30,600 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:20:30,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2021-11-23 17:20:30,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:20:30,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 17:20:30,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:20:33,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:20:33,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:20:33,162 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:20:33,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [382404573] [2021-11-23 17:20:33,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [382404573] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:20:33,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:20:33,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-23 17:20:33,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828648918] [2021-11-23 17:20:33,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:20:33,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 17:20:33,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:20:33,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 17:20:33,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-23 17:20:33,163 INFO L87 Difference]: Start difference. First operand 658 states and 827 transitions. Second operand has 14 states, 14 states have (on average 7.071428571428571) internal successors, (99), 14 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:33,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:20:33,265 INFO L93 Difference]: Finished difference Result 732 states and 943 transitions. [2021-11-23 17:20:33,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 17:20:33,265 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.071428571428571) internal successors, (99), 14 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-11-23 17:20:33,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:20:33,266 INFO L225 Difference]: With dead ends: 732 [2021-11-23 17:20:33,266 INFO L226 Difference]: Without dead ends: 541 [2021-11-23 17:20:33,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-11-23 17:20:33,267 INFO L933 BasicCegarLoop]: 631 mSDtfsCounter, 41 mSDsluCounter, 4592 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 5223 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 411 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:20:33,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 5223 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 411 Unchecked, 0.0s Time] [2021-11-23 17:20:33,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-11-23 17:20:33,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 541. [2021-11-23 17:20:33,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 524 states have (on average 1.3034351145038168) internal successors, (683), 540 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:33,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 683 transitions. [2021-11-23 17:20:33,283 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 683 transitions. Word has length 99 [2021-11-23 17:20:33,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:20:33,283 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 683 transitions. [2021-11-23 17:20:33,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.071428571428571) internal successors, (99), 14 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:33,284 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 683 transitions. [2021-11-23 17:20:33,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-23 17:20:33,284 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:20:33,285 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:20:33,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (67)] Forceful destruction successful, exit code 0 [2021-11-23 17:20:33,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:20:33,485 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:20:33,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:20:33,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1407077202, now seen corresponding path program 1 times [2021-11-23 17:20:33,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:20:33,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1296621045] [2021-11-23 17:20:33,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:20:33,487 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:20:33,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:20:33,488 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:20:33,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2021-11-23 17:20:33,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:20:33,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:20:33,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:20:34,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:20:34,474 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:20:34,474 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:20:34,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1296621045] [2021-11-23 17:20:34,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1296621045] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:20:34,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:20:34,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:20:34,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979489459] [2021-11-23 17:20:34,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:20:34,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:20:34,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:20:34,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:20:34,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:20:34,476 INFO L87 Difference]: Start difference. First operand 541 states and 683 transitions. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:34,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:20:34,493 INFO L93 Difference]: Finished difference Result 615 states and 799 transitions. [2021-11-23 17:20:34,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:20:34,493 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-11-23 17:20:34,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:20:34,494 INFO L225 Difference]: With dead ends: 615 [2021-11-23 17:20:34,494 INFO L226 Difference]: Without dead ends: 324 [2021-11-23 17:20:34,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:20:34,495 INFO L933 BasicCegarLoop]: 362 mSDtfsCounter, 37 mSDsluCounter, 1348 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1710 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:20:34,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 1710 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 83 Unchecked, 0.0s Time] [2021-11-23 17:20:34,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-11-23 17:20:34,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 324. [2021-11-23 17:20:34,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 313 states have (on average 1.29073482428115) internal successors, (404), 323 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:34,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 404 transitions. [2021-11-23 17:20:34,511 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 404 transitions. Word has length 99 [2021-11-23 17:20:34,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:20:34,512 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 404 transitions. [2021-11-23 17:20:34,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:34,512 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 404 transitions. [2021-11-23 17:20:34,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-23 17:20:34,512 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:20:34,512 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:20:34,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (68)] Forceful destruction successful, exit code 0 [2021-11-23 17:20:34,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:20:34,713 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:20:34,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:20:34,713 INFO L85 PathProgramCache]: Analyzing trace with hash -927387509, now seen corresponding path program 1 times [2021-11-23 17:20:34,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:20:34,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1450878728] [2021-11-23 17:20:34,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:20:34,714 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:20:34,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:20:34,715 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:20:34,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2021-11-23 17:20:34,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:20:34,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 17:20:34,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:20:37,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:20:37,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:20:37,439 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:20:37,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1450878728] [2021-11-23 17:20:37,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1450878728] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:20:37,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:20:37,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-23 17:20:37,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249058596] [2021-11-23 17:20:37,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:20:37,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 17:20:37,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:20:37,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 17:20:37,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-23 17:20:37,440 INFO L87 Difference]: Start difference. First operand 324 states and 404 transitions. Second operand has 14 states, 14 states have (on average 7.142857142857143) internal successors, (100), 14 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:37,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:20:37,530 INFO L93 Difference]: Finished difference Result 398 states and 520 transitions. [2021-11-23 17:20:37,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 17:20:37,531 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.142857142857143) internal successors, (100), 14 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-23 17:20:37,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:20:37,531 INFO L225 Difference]: With dead ends: 398 [2021-11-23 17:20:37,531 INFO L226 Difference]: Without dead ends: 308 [2021-11-23 17:20:37,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-11-23 17:20:37,532 INFO L933 BasicCegarLoop]: 328 mSDtfsCounter, 73 mSDsluCounter, 2112 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 2440 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 431 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:20:37,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 2440 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 431 Unchecked, 0.0s Time] [2021-11-23 17:20:37,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-11-23 17:20:37,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 302. [2021-11-23 17:20:37,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 293 states have (on average 1.286689419795222) internal successors, (377), 301 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:37,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 377 transitions. [2021-11-23 17:20:37,546 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 377 transitions. Word has length 100 [2021-11-23 17:20:37,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:20:37,547 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 377 transitions. [2021-11-23 17:20:37,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.142857142857143) internal successors, (100), 14 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:37,547 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 377 transitions. [2021-11-23 17:20:37,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-23 17:20:37,548 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:20:37,548 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:20:37,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (69)] Forceful destruction successful, exit code 0 [2021-11-23 17:20:37,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:20:37,761 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:20:37,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:20:37,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1437058473, now seen corresponding path program 1 times [2021-11-23 17:20:37,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:20:37,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2138662411] [2021-11-23 17:20:37,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:20:37,762 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:20:37,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:20:37,762 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:20:37,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2021-11-23 17:20:38,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:20:38,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:20:38,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:20:39,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:20:39,247 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:20:39,248 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:20:39,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2138662411] [2021-11-23 17:20:39,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2138662411] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:20:39,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:20:39,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 17:20:39,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131445648] [2021-11-23 17:20:39,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:20:39,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 17:20:39,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:20:39,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 17:20:39,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:20:39,249 INFO L87 Difference]: Start difference. First operand 302 states and 377 transitions. Second operand has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:39,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:20:39,321 INFO L93 Difference]: Finished difference Result 376 states and 493 transitions. [2021-11-23 17:20:39,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 17:20:39,322 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-23 17:20:39,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:20:39,322 INFO L225 Difference]: With dead ends: 376 [2021-11-23 17:20:39,322 INFO L226 Difference]: Without dead ends: 269 [2021-11-23 17:20:39,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:20:39,323 INFO L933 BasicCegarLoop]: 298 mSDtfsCounter, 51 mSDsluCounter, 1596 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1894 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:20:39,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 1894 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 126 Unchecked, 0.0s Time] [2021-11-23 17:20:39,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-11-23 17:20:39,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 263. [2021-11-23 17:20:39,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 257 states have (on average 1.284046692607004) internal successors, (330), 262 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:39,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 330 transitions. [2021-11-23 17:20:39,333 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 330 transitions. Word has length 100 [2021-11-23 17:20:39,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:20:39,333 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 330 transitions. [2021-11-23 17:20:39,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:39,334 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 330 transitions. [2021-11-23 17:20:39,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-23 17:20:39,334 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:20:39,334 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:20:39,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (70)] Forceful destruction successful, exit code 0 [2021-11-23 17:20:39,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:20:39,535 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:20:39,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:20:39,535 INFO L85 PathProgramCache]: Analyzing trace with hash -2008689100, now seen corresponding path program 1 times [2021-11-23 17:20:39,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:20:39,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [371342098] [2021-11-23 17:20:39,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:20:39,536 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:20:39,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:20:39,537 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:20:39,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2021-11-23 17:20:39,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:20:39,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:20:39,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:20:40,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:20:40,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:20:40,858 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:20:40,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [371342098] [2021-11-23 17:20:40,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [371342098] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:20:40,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:20:40,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:20:40,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567134646] [2021-11-23 17:20:40,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:20:40,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:20:40,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:20:40,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:20:40,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:20:40,860 INFO L87 Difference]: Start difference. First operand 263 states and 330 transitions. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:41,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:20:41,033 INFO L93 Difference]: Finished difference Result 355 states and 466 transitions. [2021-11-23 17:20:41,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:20:41,033 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-23 17:20:41,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:20:41,034 INFO L225 Difference]: With dead ends: 355 [2021-11-23 17:20:41,034 INFO L226 Difference]: Without dead ends: 263 [2021-11-23 17:20:41,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:20:41,035 INFO L933 BasicCegarLoop]: 285 mSDtfsCounter, 62 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:20:41,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 806 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 175 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2021-11-23 17:20:41,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-11-23 17:20:41,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2021-11-23 17:20:41,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 257 states have (on average 1.2801556420233462) internal successors, (329), 262 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:41,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 329 transitions. [2021-11-23 17:20:41,049 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 329 transitions. Word has length 100 [2021-11-23 17:20:41,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:20:41,050 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 329 transitions. [2021-11-23 17:20:41,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:41,050 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 329 transitions. [2021-11-23 17:20:41,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-23 17:20:41,051 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:20:41,051 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:20:41,064 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (71)] Ended with exit code 0 [2021-11-23 17:20:41,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:20:41,264 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:20:41,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:20:41,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1919494980, now seen corresponding path program 1 times [2021-11-23 17:20:41,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:20:41,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [184731486] [2021-11-23 17:20:41,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:20:41,265 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:20:41,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:20:41,266 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:20:41,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2021-11-23 17:20:41,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:20:41,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 17:20:41,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:20:43,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:20:43,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:20:43,932 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:20:43,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [184731486] [2021-11-23 17:20:43,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [184731486] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:20:43,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:20:43,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-23 17:20:43,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59569187] [2021-11-23 17:20:43,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:20:43,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 17:20:43,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:20:43,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 17:20:43,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-23 17:20:43,933 INFO L87 Difference]: Start difference. First operand 263 states and 329 transitions. Second operand has 14 states, 14 states have (on average 7.142857142857143) internal successors, (100), 14 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:44,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:20:44,063 INFO L93 Difference]: Finished difference Result 337 states and 445 transitions. [2021-11-23 17:20:44,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 17:20:44,064 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.142857142857143) internal successors, (100), 14 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-23 17:20:44,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:20:44,064 INFO L225 Difference]: With dead ends: 337 [2021-11-23 17:20:44,064 INFO L226 Difference]: Without dead ends: 200 [2021-11-23 17:20:44,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-11-23 17:20:44,065 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 91 mSDsluCounter, 1642 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1856 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:20:44,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 1856 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 188 Unchecked, 0.1s Time] [2021-11-23 17:20:44,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-11-23 17:20:44,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 189. [2021-11-23 17:20:44,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 187 states have (on average 1.2727272727272727) internal successors, (238), 188 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:44,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 238 transitions. [2021-11-23 17:20:44,076 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 238 transitions. Word has length 100 [2021-11-23 17:20:44,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:20:44,077 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 238 transitions. [2021-11-23 17:20:44,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.142857142857143) internal successors, (100), 14 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:44,077 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 238 transitions. [2021-11-23 17:20:44,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-23 17:20:44,078 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:20:44,078 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:20:44,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (72)] Ended with exit code 0 [2021-11-23 17:20:44,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:20:44,291 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:20:44,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:20:44,291 INFO L85 PathProgramCache]: Analyzing trace with hash 259521936, now seen corresponding path program 1 times [2021-11-23 17:20:44,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:20:44,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [79132936] [2021-11-23 17:20:44,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:20:44,292 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:20:44,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:20:44,294 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:20:44,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2021-11-23 17:20:44,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:20:44,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-23 17:20:44,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:40,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:21:40,605 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:21:40,605 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:21:40,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [79132936] [2021-11-23 17:21:40,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [79132936] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:21:40,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:21:40,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2021-11-23 17:21:40,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177754710] [2021-11-23 17:21:40,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:21:40,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-23 17:21:40,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:21:40,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-23 17:21:40,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1101, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 17:21:40,607 INFO L87 Difference]: Start difference. First operand 189 states and 238 transitions. Second operand has 37 states, 37 states have (on average 2.7567567567567566) internal successors, (102), 37 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:42,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:21:42,001 INFO L93 Difference]: Finished difference Result 221 states and 276 transitions. [2021-11-23 17:21:42,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-23 17:21:42,001 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.7567567567567566) internal successors, (102), 37 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-11-23 17:21:42,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:21:42,002 INFO L225 Difference]: With dead ends: 221 [2021-11-23 17:21:42,002 INFO L226 Difference]: Without dead ends: 215 [2021-11-23 17:21:42,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 48.6s TimeCoverageRelationStatistics Valid=252, Invalid=1154, Unknown=0, NotChecked=0, Total=1406 [2021-11-23 17:21:42,003 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 124 mSDsluCounter, 2807 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 2986 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1091 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:21:42,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 2986 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 153 Invalid, 0 Unknown, 1091 Unchecked, 0.2s Time] [2021-11-23 17:21:42,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-11-23 17:21:42,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2021-11-23 17:21:42,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 213 states have (on average 1.267605633802817) internal successors, (270), 214 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:42,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 270 transitions. [2021-11-23 17:21:42,015 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 270 transitions. Word has length 102 [2021-11-23 17:21:42,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:21:42,015 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 270 transitions. [2021-11-23 17:21:42,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.7567567567567566) internal successors, (102), 37 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:42,016 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 270 transitions. [2021-11-23 17:21:42,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-23 17:21:42,016 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:21:42,016 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:21:42,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (73)] Ended with exit code 0 [2021-11-23 17:21:42,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:21:42,217 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:21:42,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:21:42,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1426547450, now seen corresponding path program 1 times [2021-11-23 17:21:42,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:21:42,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1579707794] [2021-11-23 17:21:42,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:21:42,218 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:21:42,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:21:42,219 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:21:42,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2021-11-23 17:21:42,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:21:42,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:21:42,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:43,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:21:43,827 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:21:43,827 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:21:43,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1579707794] [2021-11-23 17:21:43,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1579707794] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:21:43,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:21:43,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 17:21:43,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120271936] [2021-11-23 17:21:43,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:21:43,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 17:21:43,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:21:43,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 17:21:43,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:21:43,828 INFO L87 Difference]: Start difference. First operand 215 states and 270 transitions. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:43,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:21:43,887 INFO L93 Difference]: Finished difference Result 215 states and 270 transitions. [2021-11-23 17:21:43,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 17:21:43,888 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-11-23 17:21:43,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:21:43,888 INFO L225 Difference]: With dead ends: 215 [2021-11-23 17:21:43,888 INFO L226 Difference]: Without dead ends: 209 [2021-11-23 17:21:43,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:21:43,889 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 77 mSDsluCounter, 925 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 1137 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:21:43,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 1137 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 100 Unchecked, 0.0s Time] [2021-11-23 17:21:43,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-11-23 17:21:43,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 183. [2021-11-23 17:21:43,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.2747252747252746) internal successors, (232), 182 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:43,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 232 transitions. [2021-11-23 17:21:43,897 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 232 transitions. Word has length 103 [2021-11-23 17:21:43,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:21:43,898 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 232 transitions. [2021-11-23 17:21:43,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:43,898 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 232 transitions. [2021-11-23 17:21:43,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-23 17:21:43,898 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:21:43,898 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:21:43,906 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (74)] Ended with exit code 0 [2021-11-23 17:21:44,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:21:44,099 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:21:44,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:21:44,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1124148050, now seen corresponding path program 1 times [2021-11-23 17:21:44,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:21:44,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1931772274] [2021-11-23 17:21:44,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:21:44,100 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:21:44,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:21:44,101 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:21:44,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2021-11-23 17:21:44,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:21:44,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:21:44,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:45,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:21:45,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:21:45,438 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:21:45,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1931772274] [2021-11-23 17:21:45,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1931772274] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:21:45,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:21:45,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:21:45,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461804213] [2021-11-23 17:21:45,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:21:45,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:21:45,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:21:45,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:21:45,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:21:45,440 INFO L87 Difference]: Start difference. First operand 183 states and 232 transitions. Second operand has 8 states, 8 states have (on average 16.625) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:45,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:21:45,516 INFO L93 Difference]: Finished difference Result 263 states and 354 transitions. [2021-11-23 17:21:45,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:21:45,516 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.625) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-11-23 17:21:45,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:21:45,517 INFO L225 Difference]: With dead ends: 263 [2021-11-23 17:21:45,517 INFO L226 Difference]: Without dead ends: 183 [2021-11-23 17:21:45,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:21:45,517 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 63 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:21:45,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 708 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 150 Unchecked, 0.1s Time] [2021-11-23 17:21:45,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-23 17:21:45,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2021-11-23 17:21:45,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.2692307692307692) internal successors, (231), 182 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:45,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 231 transitions. [2021-11-23 17:21:45,525 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 231 transitions. Word has length 133 [2021-11-23 17:21:45,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:21:45,525 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 231 transitions. [2021-11-23 17:21:45,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.625) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:45,526 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 231 transitions. [2021-11-23 17:21:45,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-23 17:21:45,526 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:21:45,526 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:21:45,534 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (75)] Ended with exit code 0 [2021-11-23 17:21:45,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:21:45,727 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:21:45,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:21:45,727 INFO L85 PathProgramCache]: Analyzing trace with hash 306243552, now seen corresponding path program 1 times [2021-11-23 17:21:45,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:21:45,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1666128610] [2021-11-23 17:21:45,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:21:45,728 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:21:45,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:21:45,729 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:21:45,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2021-11-23 17:21:46,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:21:46,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:21:46,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:46,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:21:46,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:21:46,232 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:21:46,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1666128610] [2021-11-23 17:21:46,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1666128610] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:21:46,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:21:46,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:21:46,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152355231] [2021-11-23 17:21:46,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:21:46,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:21:46,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:21:46,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:21:46,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:21:46,233 INFO L87 Difference]: Start difference. First operand 183 states and 231 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:46,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:21:46,274 INFO L93 Difference]: Finished difference Result 323 states and 450 transitions. [2021-11-23 17:21:46,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:21:46,274 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-11-23 17:21:46,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:21:46,275 INFO L225 Difference]: With dead ends: 323 [2021-11-23 17:21:46,275 INFO L226 Difference]: Without dead ends: 249 [2021-11-23 17:21:46,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 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 17:21:46,276 INFO L933 BasicCegarLoop]: 310 mSDtfsCounter, 146 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:21:46,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 455 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:21:46,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-11-23 17:21:46,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 247. [2021-11-23 17:21:46,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 1.3495934959349594) internal successors, (332), 246 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:46,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 332 transitions. [2021-11-23 17:21:46,291 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 332 transitions. Word has length 135 [2021-11-23 17:21:46,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:21:46,292 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 332 transitions. [2021-11-23 17:21:46,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:46,292 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 332 transitions. [2021-11-23 17:21:46,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-23 17:21:46,293 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:21:46,293 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:21:46,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (76)] Forceful destruction successful, exit code 0 [2021-11-23 17:21:46,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:21:46,499 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:21:46,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:21:46,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1135827128, now seen corresponding path program 1 times [2021-11-23 17:21:46,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:21:46,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [135388820] [2021-11-23 17:21:46,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:21:46,500 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:21:46,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:21:46,500 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:21:46,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2021-11-23 17:21:46,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:21:46,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:21:46,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:48,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:21:48,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:21:48,338 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:21:48,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [135388820] [2021-11-23 17:21:48,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [135388820] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:21:48,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:21:48,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:21:48,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391294550] [2021-11-23 17:21:48,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:21:48,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 17:21:48,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:21:48,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 17:21:48,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:21:48,340 INFO L87 Difference]: Start difference. First operand 247 states and 332 transitions. Second operand has 9 states, 9 states have (on average 15.11111111111111) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:48,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:21:48,448 INFO L93 Difference]: Finished difference Result 426 states and 599 transitions. [2021-11-23 17:21:48,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 17:21:48,449 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.11111111111111) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-11-23 17:21:48,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:21:48,449 INFO L225 Difference]: With dead ends: 426 [2021-11-23 17:21:48,450 INFO L226 Difference]: Without dead ends: 288 [2021-11-23 17:21:48,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:21:48,450 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 84 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 236 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:21:48,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 987 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 236 Unchecked, 0.1s Time] [2021-11-23 17:21:48,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-11-23 17:21:48,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 286. [2021-11-23 17:21:48,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 1.3263157894736841) internal successors, (378), 285 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:48,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 378 transitions. [2021-11-23 17:21:48,466 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 378 transitions. Word has length 136 [2021-11-23 17:21:48,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:21:48,467 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 378 transitions. [2021-11-23 17:21:48,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.11111111111111) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:48,467 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 378 transitions. [2021-11-23 17:21:48,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-23 17:21:48,468 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:21:48,468 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:21:48,481 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (77)] Ended with exit code 0 [2021-11-23 17:21:48,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:21:48,680 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:21:48,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:21:48,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1898690835, now seen corresponding path program 1 times [2021-11-23 17:21:48,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:21:48,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1560246492] [2021-11-23 17:21:48,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:21:48,682 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:21:48,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:21:48,683 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:21:48,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2021-11-23 17:21:49,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:21:49,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:21:49,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:49,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:21:49,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:21:49,204 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:21:49,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1560246492] [2021-11-23 17:21:49,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1560246492] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:21:49,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:21:49,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:21:49,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460430697] [2021-11-23 17:21:49,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:21:49,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:21:49,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:21:49,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:21:49,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:21:49,206 INFO L87 Difference]: Start difference. First operand 286 states and 378 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:49,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:21:49,243 INFO L93 Difference]: Finished difference Result 546 states and 786 transitions. [2021-11-23 17:21:49,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:21:49,244 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-11-23 17:21:49,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:21:49,245 INFO L225 Difference]: With dead ends: 546 [2021-11-23 17:21:49,245 INFO L226 Difference]: Without dead ends: 408 [2021-11-23 17:21:49,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 134 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 17:21:49,246 INFO L933 BasicCegarLoop]: 302 mSDtfsCounter, 138 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:21:49,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 455 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:21:49,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-11-23 17:21:49,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 406. [2021-11-23 17:21:49,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 1.3975308641975308) internal successors, (566), 405 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:49,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 566 transitions. [2021-11-23 17:21:49,267 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 566 transitions. Word has length 136 [2021-11-23 17:21:49,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:21:49,268 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 566 transitions. [2021-11-23 17:21:49,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:49,268 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 566 transitions. [2021-11-23 17:21:49,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-23 17:21:49,269 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:21:49,269 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:21:49,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (78)] Forceful destruction successful, exit code 0 [2021-11-23 17:21:49,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:21:49,469 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:21:49,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:21:49,470 INFO L85 PathProgramCache]: Analyzing trace with hash 499419241, now seen corresponding path program 1 times [2021-11-23 17:21:49,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:21:49,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1119150020] [2021-11-23 17:21:49,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:21:49,471 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:21:49,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:21:49,472 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:21:49,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2021-11-23 17:21:49,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:21:49,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:21:49,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:49,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:21:49,944 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:21:49,944 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:21:49,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1119150020] [2021-11-23 17:21:49,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1119150020] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:21:49,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:21:49,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:21:49,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696799865] [2021-11-23 17:21:49,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:21:49,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:21:49,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:21:49,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:21:49,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:21:49,947 INFO L87 Difference]: Start difference. First operand 406 states and 566 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:49,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:21:49,987 INFO L93 Difference]: Finished difference Result 890 states and 1324 transitions. [2021-11-23 17:21:49,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:21:49,995 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-11-23 17:21:49,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:21:49,996 INFO L225 Difference]: With dead ends: 890 [2021-11-23 17:21:49,997 INFO L226 Difference]: Without dead ends: 632 [2021-11-23 17:21:49,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 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 17:21:49,998 INFO L933 BasicCegarLoop]: 294 mSDtfsCounter, 130 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:21:49,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 455 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:21:49,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-11-23 17:21:50,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 630. [2021-11-23 17:21:50,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 629 states have (on average 1.4531001589825119) internal successors, (914), 629 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:50,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 914 transitions. [2021-11-23 17:21:50,028 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 914 transitions. Word has length 137 [2021-11-23 17:21:50,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:21:50,029 INFO L470 AbstractCegarLoop]: Abstraction has 630 states and 914 transitions. [2021-11-23 17:21:50,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:50,029 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 914 transitions. [2021-11-23 17:21:50,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-23 17:21:50,030 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:21:50,030 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:21:50,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (79)] Forceful destruction successful, exit code 0 [2021-11-23 17:21:50,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:21:50,243 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:21:50,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:21:50,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1808794179, now seen corresponding path program 1 times [2021-11-23 17:21:50,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:21:50,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [50460659] [2021-11-23 17:21:50,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:21:50,244 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:21:50,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:21:50,245 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:21:50,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2021-11-23 17:21:50,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:21:50,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:21:50,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:52,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:21:52,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:21:52,216 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:21:52,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [50460659] [2021-11-23 17:21:52,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [50460659] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:21:52,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:21:52,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:21:52,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830178607] [2021-11-23 17:21:52,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:21:52,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 17:21:52,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:21:52,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 17:21:52,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:21:52,217 INFO L87 Difference]: Start difference. First operand 630 states and 914 transitions. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 8 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:52,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:21:52,346 INFO L93 Difference]: Finished difference Result 1178 states and 1749 transitions. [2021-11-23 17:21:52,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 17:21:52,347 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 8 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2021-11-23 17:21:52,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:21:52,349 INFO L225 Difference]: With dead ends: 1178 [2021-11-23 17:21:52,349 INFO L226 Difference]: Without dead ends: 696 [2021-11-23 17:21:52,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:21:52,350 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 91 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:21:52,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 845 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 141 Unchecked, 0.1s Time] [2021-11-23 17:21:52,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-11-23 17:21:52,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 694. [2021-11-23 17:21:52,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 693 states have (on average 1.4314574314574315) internal successors, (992), 693 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:52,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 992 transitions. [2021-11-23 17:21:52,395 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 992 transitions. Word has length 138 [2021-11-23 17:21:52,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:21:52,396 INFO L470 AbstractCegarLoop]: Abstraction has 694 states and 992 transitions. [2021-11-23 17:21:52,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 8 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:52,396 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 992 transitions. [2021-11-23 17:21:52,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-23 17:21:52,397 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:21:52,397 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:21:52,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (80)] Forceful destruction successful, exit code 0 [2021-11-23 17:21:52,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:21:52,611 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:21:52,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:21:52,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1039143522, now seen corresponding path program 1 times [2021-11-23 17:21:52,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:21:52,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [637030242] [2021-11-23 17:21:52,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:21:52,612 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:21:52,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:21:52,614 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:21:52,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2021-11-23 17:21:52,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:21:52,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:21:52,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:53,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:21:53,151 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:21:53,152 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:21:53,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [637030242] [2021-11-23 17:21:53,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [637030242] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:21:53,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:21:53,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:21:53,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467260868] [2021-11-23 17:21:53,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:21:53,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:21:53,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:21:53,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:21:53,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:21:53,154 INFO L87 Difference]: Start difference. First operand 694 states and 992 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:53,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:21:53,210 INFO L93 Difference]: Finished difference Result 1594 states and 2394 transitions. [2021-11-23 17:21:53,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:21:53,211 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2021-11-23 17:21:53,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:21:53,213 INFO L225 Difference]: With dead ends: 1594 [2021-11-23 17:21:53,214 INFO L226 Difference]: Without dead ends: 1112 [2021-11-23 17:21:53,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 136 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 17:21:53,215 INFO L933 BasicCegarLoop]: 286 mSDtfsCounter, 122 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:21:53,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 455 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:21:53,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2021-11-23 17:21:53,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 1110. [2021-11-23 17:21:53,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1110 states, 1109 states have (on average 1.4715960324616773) internal successors, (1632), 1109 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:53,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1110 states to 1110 states and 1632 transitions. [2021-11-23 17:21:53,276 INFO L78 Accepts]: Start accepts. Automaton has 1110 states and 1632 transitions. Word has length 138 [2021-11-23 17:21:53,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:21:53,277 INFO L470 AbstractCegarLoop]: Abstraction has 1110 states and 1632 transitions. [2021-11-23 17:21:53,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:53,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states and 1632 transitions. [2021-11-23 17:21:53,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-23 17:21:53,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:21:53,278 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:21:53,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (81)] Forceful destruction successful, exit code 0 [2021-11-23 17:21:53,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:21:53,492 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:21:53,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:21:53,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1138597221, now seen corresponding path program 1 times [2021-11-23 17:21:53,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:21:53,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1572508782] [2021-11-23 17:21:53,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:21:53,493 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:21:53,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:21:53,494 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:21:53,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2021-11-23 17:21:53,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:21:53,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:21:53,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:55,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:21:55,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:21:55,455 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:21:55,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1572508782] [2021-11-23 17:21:55,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1572508782] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:21:55,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:21:55,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:21:55,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430246763] [2021-11-23 17:21:55,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:21:55,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 17:21:55,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:21:55,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 17:21:55,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:21:55,457 INFO L87 Difference]: Start difference. First operand 1110 states and 1632 transitions. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 8 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:55,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:21:55,574 INFO L93 Difference]: Finished difference Result 2121 states and 3166 transitions. [2021-11-23 17:21:55,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 17:21:55,574 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 8 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-11-23 17:21:55,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:21:55,576 INFO L225 Difference]: With dead ends: 2121 [2021-11-23 17:21:55,576 INFO L226 Difference]: Without dead ends: 1223 [2021-11-23 17:21:55,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:21:55,578 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 109 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:21:55,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 697 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 91 Unchecked, 0.0s Time] [2021-11-23 17:21:55,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2021-11-23 17:21:55,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 1221. [2021-11-23 17:21:55,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1220 states have (on average 1.45) internal successors, (1769), 1220 states have internal predecessors, (1769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:55,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 1769 transitions. [2021-11-23 17:21:55,665 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 1769 transitions. Word has length 139 [2021-11-23 17:21:55,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:21:55,666 INFO L470 AbstractCegarLoop]: Abstraction has 1221 states and 1769 transitions. [2021-11-23 17:21:55,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 8 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:55,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 1769 transitions. [2021-11-23 17:21:55,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-23 17:21:55,668 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:21:55,668 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:21:55,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (82)] Forceful destruction successful, exit code 0 [2021-11-23 17:21:55,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:21:55,883 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:21:55,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:21:55,884 INFO L85 PathProgramCache]: Analyzing trace with hash -129774454, now seen corresponding path program 1 times [2021-11-23 17:21:55,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:21:55,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1809802167] [2021-11-23 17:21:55,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:21:55,885 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:21:55,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:21:55,887 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:21:55,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2021-11-23 17:21:56,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:21:56,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:21:56,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:56,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:21:56,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:21:56,630 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:21:56,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1809802167] [2021-11-23 17:21:56,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1809802167] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:21:56,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:21:56,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:21:56,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344487356] [2021-11-23 17:21:56,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:21:56,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:21:56,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:21:56,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:21:56,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:21:56,632 INFO L87 Difference]: Start difference. First operand 1221 states and 1769 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:56,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:21:56,738 INFO L93 Difference]: Finished difference Result 2889 states and 4347 transitions. [2021-11-23 17:21:56,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:21:56,738 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-11-23 17:21:56,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:21:56,745 INFO L225 Difference]: With dead ends: 2889 [2021-11-23 17:21:56,745 INFO L226 Difference]: Without dead ends: 1991 [2021-11-23 17:21:56,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 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 17:21:56,748 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 114 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:21:56,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 455 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:21:56,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1991 states. [2021-11-23 17:21:56,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1991 to 1989. [2021-11-23 17:21:56,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1989 states, 1988 states have (on average 1.477364185110664) internal successors, (2937), 1988 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:56,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1989 states to 1989 states and 2937 transitions. [2021-11-23 17:21:56,853 INFO L78 Accepts]: Start accepts. Automaton has 1989 states and 2937 transitions. Word has length 139 [2021-11-23 17:21:56,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:21:56,854 INFO L470 AbstractCegarLoop]: Abstraction has 1989 states and 2937 transitions. [2021-11-23 17:21:56,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:56,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1989 states and 2937 transitions. [2021-11-23 17:21:56,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-23 17:21:56,855 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:21:56,856 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:21:56,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (83)] Forceful destruction successful, exit code 0 [2021-11-23 17:21:57,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:21:57,071 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:21:57,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:21:57,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1134966838, now seen corresponding path program 1 times [2021-11-23 17:21:57,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:21:57,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1621586581] [2021-11-23 17:21:57,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:21:57,072 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:21:57,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:21:57,074 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:21:57,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2021-11-23 17:21:57,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:21:57,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:21:57,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:59,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:21:59,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:21:59,519 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:21:59,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1621586581] [2021-11-23 17:21:59,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1621586581] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:21:59,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:21:59,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:21:59,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505072537] [2021-11-23 17:21:59,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:21:59,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 17:21:59,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:21:59,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 17:21:59,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:21:59,521 INFO L87 Difference]: Start difference. First operand 1989 states and 2937 transitions. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:59,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:21:59,665 INFO L93 Difference]: Finished difference Result 3832 states and 5723 transitions. [2021-11-23 17:21:59,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 17:21:59,665 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-11-23 17:21:59,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:21:59,669 INFO L225 Difference]: With dead ends: 3832 [2021-11-23 17:21:59,669 INFO L226 Difference]: Without dead ends: 2166 [2021-11-23 17:21:59,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:21:59,673 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 96 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:21:59,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 748 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 111 Unchecked, 0.0s Time] [2021-11-23 17:21:59,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2166 states. [2021-11-23 17:21:59,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2166 to 2164. [2021-11-23 17:21:59,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2164 states, 2163 states have (on average 1.4600092464170134) internal successors, (3158), 2163 states have internal predecessors, (3158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:59,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2164 states to 2164 states and 3158 transitions. [2021-11-23 17:21:59,818 INFO L78 Accepts]: Start accepts. Automaton has 2164 states and 3158 transitions. Word has length 140 [2021-11-23 17:21:59,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:21:59,819 INFO L470 AbstractCegarLoop]: Abstraction has 2164 states and 3158 transitions. [2021-11-23 17:21:59,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:59,819 INFO L276 IsEmpty]: Start isEmpty. Operand 2164 states and 3158 transitions. [2021-11-23 17:21:59,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-23 17:21:59,821 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:21:59,821 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:21:59,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (84)] Forceful destruction successful, exit code 0 [2021-11-23 17:22:00,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:22:00,036 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:22:00,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:22:00,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1013493393, now seen corresponding path program 1 times [2021-11-23 17:22:00,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:22:00,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [213137052] [2021-11-23 17:22:00,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:22:00,037 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:22:00,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:22:00,037 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:22:00,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2021-11-23 17:22:00,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:22:00,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:22:00,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:22:03,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:22:03,135 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:22:03,135 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:22:03,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [213137052] [2021-11-23 17:22:03,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [213137052] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:22:03,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:22:03,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:22:03,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883303057] [2021-11-23 17:22:03,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:22:03,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:22:03,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:22:03,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:22:03,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:22:03,137 INFO L87 Difference]: Start difference. First operand 2164 states and 3158 transitions. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:03,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:22:03,753 INFO L93 Difference]: Finished difference Result 13826 states and 21085 transitions. [2021-11-23 17:22:03,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:22:03,754 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-11-23 17:22:03,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:22:03,769 INFO L225 Difference]: With dead ends: 13826 [2021-11-23 17:22:03,769 INFO L226 Difference]: Without dead ends: 12160 [2021-11-23 17:22:03,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:22:03,773 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 1299 mSDsluCounter, 1213 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1299 SdHoareTripleChecker+Valid, 1437 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:22:03,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1299 Valid, 1437 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 17:22:03,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12160 states. [2021-11-23 17:22:04,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12160 to 5492. [2021-11-23 17:22:04,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5492 states, 5491 states have (on average 1.490074667637953) internal successors, (8182), 5491 states have internal predecessors, (8182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:04,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5492 states to 5492 states and 8182 transitions. [2021-11-23 17:22:04,169 INFO L78 Accepts]: Start accepts. Automaton has 5492 states and 8182 transitions. Word has length 140 [2021-11-23 17:22:04,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:22:04,169 INFO L470 AbstractCegarLoop]: Abstraction has 5492 states and 8182 transitions. [2021-11-23 17:22:04,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:04,169 INFO L276 IsEmpty]: Start isEmpty. Operand 5492 states and 8182 transitions. [2021-11-23 17:22:04,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-23 17:22:04,171 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:22:04,171 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:22:04,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (85)] Ended with exit code 0 [2021-11-23 17:22:04,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:22:04,371 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:22:04,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:22:04,372 INFO L85 PathProgramCache]: Analyzing trace with hash -183040656, now seen corresponding path program 1 times [2021-11-23 17:22:04,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:22:04,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [339785087] [2021-11-23 17:22:04,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:22:04,373 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:22:04,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:22:04,375 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:22:04,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2021-11-23 17:22:04,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:22:04,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:22:04,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:22:05,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:22:05,256 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:22:05,256 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:22:05,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [339785087] [2021-11-23 17:22:05,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [339785087] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:22:05,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:22:05,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:22:05,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856353154] [2021-11-23 17:22:05,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:22:05,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:22:05,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:22:05,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:22:05,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:22:05,258 INFO L87 Difference]: Start difference. First operand 5492 states and 8182 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:05,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:22:05,557 INFO L93 Difference]: Finished difference Result 10527 states and 15823 transitions. [2021-11-23 17:22:05,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:22:05,558 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-11-23 17:22:05,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:22:05,564 INFO L225 Difference]: With dead ends: 10527 [2021-11-23 17:22:05,564 INFO L226 Difference]: Without dead ends: 5533 [2021-11-23 17:22:05,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:22:05,570 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 31 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:22:05,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 548 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2021-11-23 17:22:05,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5533 states. [2021-11-23 17:22:05,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5533 to 5532. [2021-11-23 17:22:05,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5532 states, 5531 states have (on average 1.4888808533719038) internal successors, (8235), 5531 states have internal predecessors, (8235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:05,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5532 states to 5532 states and 8235 transitions. [2021-11-23 17:22:05,966 INFO L78 Accepts]: Start accepts. Automaton has 5532 states and 8235 transitions. Word has length 142 [2021-11-23 17:22:05,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:22:05,966 INFO L470 AbstractCegarLoop]: Abstraction has 5532 states and 8235 transitions. [2021-11-23 17:22:05,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:05,967 INFO L276 IsEmpty]: Start isEmpty. Operand 5532 states and 8235 transitions. [2021-11-23 17:22:05,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-23 17:22:05,968 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:22:05,969 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:22:05,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (86)] Forceful destruction successful, exit code 0 [2021-11-23 17:22:06,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:22:06,171 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:22:06,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:22:06,171 INFO L85 PathProgramCache]: Analyzing trace with hash 18653010, now seen corresponding path program 1 times [2021-11-23 17:22:06,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:22:06,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2063024769] [2021-11-23 17:22:06,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:22:06,172 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:22:06,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:22:06,173 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:22:06,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (87)] Waiting until timeout for monitored process [2021-11-23 17:22:06,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:22:06,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:22:06,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:22:06,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:22:06,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:22:06,766 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:22:06,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2063024769] [2021-11-23 17:22:06,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2063024769] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:22:06,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:22:06,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:22:06,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754662161] [2021-11-23 17:22:06,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:22:06,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:22:06,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:22:06,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:22:06,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:22:06,770 INFO L87 Difference]: Start difference. First operand 5532 states and 8235 transitions. Second operand has 5 states, 5 states have (on average 28.6) internal successors, (143), 5 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:07,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:22:07,633 INFO L93 Difference]: Finished difference Result 10995 states and 16320 transitions. [2021-11-23 17:22:07,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:22:07,633 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.6) internal successors, (143), 5 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-11-23 17:22:07,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:22:07,646 INFO L225 Difference]: With dead ends: 10995 [2021-11-23 17:22:07,646 INFO L226 Difference]: Without dead ends: 10993 [2021-11-23 17:22:07,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:22:07,650 INFO L933 BasicCegarLoop]: 301 mSDtfsCounter, 378 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 933 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:22:07,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [378 Valid, 933 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:22:07,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10993 states. [2021-11-23 17:22:08,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10993 to 5820. [2021-11-23 17:22:08,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5820 states, 5819 states have (on average 1.4646846537205704) internal successors, (8523), 5819 states have internal predecessors, (8523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:08,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5820 states to 5820 states and 8523 transitions. [2021-11-23 17:22:08,168 INFO L78 Accepts]: Start accepts. Automaton has 5820 states and 8523 transitions. Word has length 143 [2021-11-23 17:22:08,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:22:08,169 INFO L470 AbstractCegarLoop]: Abstraction has 5820 states and 8523 transitions. [2021-11-23 17:22:08,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.6) internal successors, (143), 5 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:08,169 INFO L276 IsEmpty]: Start isEmpty. Operand 5820 states and 8523 transitions. [2021-11-23 17:22:08,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-23 17:22:08,171 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:22:08,171 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:22:08,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (87)] Forceful destruction successful, exit code 0 [2021-11-23 17:22:08,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:22:08,371 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:22:08,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:22:08,372 INFO L85 PathProgramCache]: Analyzing trace with hash 2109037349, now seen corresponding path program 1 times [2021-11-23 17:22:08,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:22:08,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [573419472] [2021-11-23 17:22:08,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:22:08,373 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:22:08,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:22:08,374 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:22:08,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2021-11-23 17:22:08,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:22:08,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:22:08,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:22:08,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:22:08,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:22:08,912 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:22:08,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [573419472] [2021-11-23 17:22:08,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [573419472] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:22:08,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:22:08,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:22:08,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453236602] [2021-11-23 17:22:08,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:22:08,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:22:08,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:22:08,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:22:08,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:22:08,914 INFO L87 Difference]: Start difference. First operand 5820 states and 8523 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:09,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:22:09,580 INFO L93 Difference]: Finished difference Result 15424 states and 22733 transitions. [2021-11-23 17:22:09,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:22:09,581 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-11-23 17:22:09,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:22:09,592 INFO L225 Difference]: With dead ends: 15424 [2021-11-23 17:22:09,592 INFO L226 Difference]: Without dead ends: 10142 [2021-11-23 17:22:09,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 141 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 17:22:09,598 INFO L933 BasicCegarLoop]: 326 mSDtfsCounter, 151 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:22:09,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 463 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:22:09,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10142 states. [2021-11-23 17:22:10,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10142 to 10140. [2021-11-23 17:22:10,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10140 states, 10139 states have (on average 1.454482690600651) internal successors, (14747), 10139 states have internal predecessors, (14747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:10,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10140 states to 10140 states and 14747 transitions. [2021-11-23 17:22:10,275 INFO L78 Accepts]: Start accepts. Automaton has 10140 states and 14747 transitions. Word has length 143 [2021-11-23 17:22:10,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:22:10,275 INFO L470 AbstractCegarLoop]: Abstraction has 10140 states and 14747 transitions. [2021-11-23 17:22:10,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:10,276 INFO L276 IsEmpty]: Start isEmpty. Operand 10140 states and 14747 transitions. [2021-11-23 17:22:10,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-23 17:22:10,277 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:22:10,277 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:22:10,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (88)] Forceful destruction successful, exit code 0 [2021-11-23 17:22:10,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:22:10,479 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:22:10,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:22:10,479 INFO L85 PathProgramCache]: Analyzing trace with hash 994689204, now seen corresponding path program 1 times [2021-11-23 17:22:10,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:22:10,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2134967826] [2021-11-23 17:22:10,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:22:10,480 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:22:10,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:22:10,480 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:22:10,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2021-11-23 17:22:10,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:22:10,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:22:10,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:22:11,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:22:11,332 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:22:11,332 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:22:11,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2134967826] [2021-11-23 17:22:11,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2134967826] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:22:11,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:22:11,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:22:11,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605703868] [2021-11-23 17:22:11,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:22:11,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:22:11,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:22:11,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:22:11,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:22:11,335 INFO L87 Difference]: Start difference. First operand 10140 states and 14747 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:12,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:22:12,006 INFO L93 Difference]: Finished difference Result 19744 states and 28863 transitions. [2021-11-23 17:22:12,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:22:12,007 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2021-11-23 17:22:12,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:22:12,017 INFO L225 Difference]: With dead ends: 19744 [2021-11-23 17:22:12,018 INFO L226 Difference]: Without dead ends: 10142 [2021-11-23 17:22:12,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:22:12,027 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 30 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:22:12,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 549 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2021-11-23 17:22:12,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10142 states. [2021-11-23 17:22:12,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10142 to 10142. [2021-11-23 17:22:12,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10142 states, 10141 states have (on average 1.454393057883838) internal successors, (14749), 10141 states have internal predecessors, (14749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:12,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10142 states to 10142 states and 14749 transitions. [2021-11-23 17:22:12,717 INFO L78 Accepts]: Start accepts. Automaton has 10142 states and 14749 transitions. Word has length 144 [2021-11-23 17:22:12,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:22:12,717 INFO L470 AbstractCegarLoop]: Abstraction has 10142 states and 14749 transitions. [2021-11-23 17:22:12,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:12,717 INFO L276 IsEmpty]: Start isEmpty. Operand 10142 states and 14749 transitions. [2021-11-23 17:22:12,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-23 17:22:12,723 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:22:12,723 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:22:12,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (89)] Forceful destruction successful, exit code 0 [2021-11-23 17:22:12,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:22:12,925 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:22:12,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:22:12,926 INFO L85 PathProgramCache]: Analyzing trace with hash -34946229, now seen corresponding path program 1 times [2021-11-23 17:22:12,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:22:12,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2144661900] [2021-11-23 17:22:12,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:22:12,926 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:22:12,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:22:12,927 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:22:12,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2021-11-23 17:22:13,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:22:13,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:22:13,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:22:13,482 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:22:13,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:22:13,483 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:22:13,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2144661900] [2021-11-23 17:22:13,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2144661900] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:22:13,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:22:13,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:22:13,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203678888] [2021-11-23 17:22:13,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:22:13,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:22:13,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:22:13,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:22:13,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:22:13,485 INFO L87 Difference]: Start difference. First operand 10142 states and 14749 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:14,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:22:14,304 INFO L93 Difference]: Finished difference Result 19746 states and 28863 transitions. [2021-11-23 17:22:14,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:22:14,304 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 176 [2021-11-23 17:22:14,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:22:14,317 INFO L225 Difference]: With dead ends: 19746 [2021-11-23 17:22:14,317 INFO L226 Difference]: Without dead ends: 10144 [2021-11-23 17:22:14,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 174 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 17:22:14,327 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 100 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:22:14,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 463 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:22:14,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10144 states. [2021-11-23 17:22:15,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10144 to 10142. [2021-11-23 17:22:15,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10142 states, 10141 states have (on average 1.4449265358445913) internal successors, (14653), 10141 states have internal predecessors, (14653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:15,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10142 states to 10142 states and 14653 transitions. [2021-11-23 17:22:15,058 INFO L78 Accepts]: Start accepts. Automaton has 10142 states and 14653 transitions. Word has length 176 [2021-11-23 17:22:15,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:22:15,058 INFO L470 AbstractCegarLoop]: Abstraction has 10142 states and 14653 transitions. [2021-11-23 17:22:15,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:15,058 INFO L276 IsEmpty]: Start isEmpty. Operand 10142 states and 14653 transitions. [2021-11-23 17:22:15,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-23 17:22:15,063 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:22:15,063 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:22:15,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (90)] Forceful destruction successful, exit code 0 [2021-11-23 17:22:15,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:22:15,279 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:22:15,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:22:15,279 INFO L85 PathProgramCache]: Analyzing trace with hash -165670744, now seen corresponding path program 1 times [2021-11-23 17:22:15,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:22:15,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [876905474] [2021-11-23 17:22:15,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:22:15,280 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:22:15,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:22:15,281 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:22:15,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (91)] Waiting until timeout for monitored process [2021-11-23 17:22:15,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:22:15,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:22:15,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:22:16,397 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:22:16,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:22:16,397 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:22:16,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [876905474] [2021-11-23 17:22:16,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [876905474] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:22:16,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:22:16,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:22:16,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341798895] [2021-11-23 17:22:16,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:22:16,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:22:16,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:22:16,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:22:16,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:22:16,399 INFO L87 Difference]: Start difference. First operand 10142 states and 14653 transitions. Second operand has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:17,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:22:17,091 INFO L93 Difference]: Finished difference Result 19750 states and 28677 transitions. [2021-11-23 17:22:17,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:22:17,092 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2021-11-23 17:22:17,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:22:17,104 INFO L225 Difference]: With dead ends: 19750 [2021-11-23 17:22:17,104 INFO L226 Difference]: Without dead ends: 10148 [2021-11-23 17:22:17,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:22:17,114 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 30 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:22:17,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 548 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2021-11-23 17:22:17,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10148 states. [2021-11-23 17:22:17,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10148 to 10148. [2021-11-23 17:22:17,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10148 states, 10147 states have (on average 1.4446634473243323) internal successors, (14659), 10147 states have internal predecessors, (14659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:17,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10148 states to 10148 states and 14659 transitions. [2021-11-23 17:22:17,906 INFO L78 Accepts]: Start accepts. Automaton has 10148 states and 14659 transitions. Word has length 177 [2021-11-23 17:22:17,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:22:17,907 INFO L470 AbstractCegarLoop]: Abstraction has 10148 states and 14659 transitions. [2021-11-23 17:22:17,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:17,907 INFO L276 IsEmpty]: Start isEmpty. Operand 10148 states and 14659 transitions. [2021-11-23 17:22:17,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-23 17:22:17,911 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:22:17,911 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:22:17,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (91)] Forceful destruction successful, exit code 0 [2021-11-23 17:22:18,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:22:18,112 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:22:18,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:22:18,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1414847909, now seen corresponding path program 1 times [2021-11-23 17:22:18,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:22:18,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1030434029] [2021-11-23 17:22:18,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:22:18,114 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:22:18,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:22:18,115 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:22:18,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2021-11-23 17:22:18,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:22:18,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:22:18,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:22:21,445 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:22:21,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:22:22,800 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:22:22,800 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:22:22,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1030434029] [2021-11-23 17:22:22,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1030434029] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:22:22,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [363038764] [2021-11-23 17:22:22,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:22:22,802 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:22:22,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:22:22,808 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:22:22,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (93)] Waiting until timeout for monitored process [2021-11-23 17:22:23,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:22:23,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:22:23,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:22:26,727 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:22:26,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:22:27,579 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:22:27,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [363038764] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:22:27,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785964695] [2021-11-23 17:22:27,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:22:27,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:22:27,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:22:27,582 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:22:27,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-11-23 17:22:27,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:22:27,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:22:27,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:22:30,854 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:22:30,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:22:31,899 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:22:31,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785964695] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:22:31,900 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:22:31,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 8, 8] total 29 [2021-11-23 17:22:31,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765616900] [2021-11-23 17:22:31,901 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:22:31,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-23 17:22:31,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:22:31,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-23 17:22:31,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2021-11-23 17:22:31,904 INFO L87 Difference]: Start difference. First operand 10148 states and 14659 transitions. Second operand has 30 states, 30 states have (on average 18.366666666666667) internal successors, (551), 29 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:33,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:22:33,454 INFO L93 Difference]: Finished difference Result 20434 states and 29464 transitions. [2021-11-23 17:22:33,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 17:22:33,454 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 18.366666666666667) internal successors, (551), 29 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2021-11-23 17:22:33,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:22:33,469 INFO L225 Difference]: With dead ends: 20434 [2021-11-23 17:22:33,469 INFO L226 Difference]: Without dead ends: 10832 [2021-11-23 17:22:33,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1067 GetRequests, 1030 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=232, Invalid=1250, Unknown=0, NotChecked=0, Total=1482 [2021-11-23 17:22:33,481 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 340 mSDsluCounter, 1885 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 2049 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 358 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:22:33,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 2049 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 182 Invalid, 0 Unknown, 358 Unchecked, 0.1s Time] [2021-11-23 17:22:33,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10832 states. [2021-11-23 17:22:34,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10832 to 10632. [2021-11-23 17:22:34,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10632 states, 10631 states have (on average 1.433825604364594) internal successors, (15243), 10631 states have internal predecessors, (15243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:34,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10632 states to 10632 states and 15243 transitions. [2021-11-23 17:22:34,307 INFO L78 Accepts]: Start accepts. Automaton has 10632 states and 15243 transitions. Word has length 177 [2021-11-23 17:22:34,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:22:34,307 INFO L470 AbstractCegarLoop]: Abstraction has 10632 states and 15243 transitions. [2021-11-23 17:22:34,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 18.366666666666667) internal successors, (551), 29 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:34,307 INFO L276 IsEmpty]: Start isEmpty. Operand 10632 states and 15243 transitions. [2021-11-23 17:22:34,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-23 17:22:34,311 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:22:34,312 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:22:34,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (93)] Forceful destruction successful, exit code 0 [2021-11-23 17:22:34,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (92)] Ended with exit code 0 [2021-11-23 17:22:34,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2021-11-23 17:22:34,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:22:34,913 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:22:34,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:22:34,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1447181419, now seen corresponding path program 1 times [2021-11-23 17:22:34,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:22:34,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1200515982] [2021-11-23 17:22:34,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:22:34,914 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:22:34,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:22:34,915 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:22:34,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (95)] Waiting until timeout for monitored process [2021-11-23 17:22:35,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:22:35,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:22:35,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:22:37,835 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:22:37,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:22:38,698 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:22:38,698 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:22:38,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1200515982] [2021-11-23 17:22:38,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1200515982] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:22:38,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [716458662] [2021-11-23 17:22:38,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:22:38,699 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:22:38,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:22:38,699 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:22:38,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (96)] Waiting until timeout for monitored process [2021-11-23 17:22:39,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:22:39,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:22:39,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:22:42,301 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:22:42,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:22:43,051 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:22:43,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [716458662] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:22:43,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576976059] [2021-11-23 17:22:43,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:22:43,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:22:43,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:22:43,053 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:22:43,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-11-23 17:22:43,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:22:43,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:22:43,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:22:45,075 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:22:45,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:22:46,171 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:22:46,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576976059] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:22:46,172 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:22:46,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 8, 8] total 31 [2021-11-23 17:22:46,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553448152] [2021-11-23 17:22:46,172 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:22:46,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-23 17:22:46,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:22:46,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-23 17:22:46,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2021-11-23 17:22:46,174 INFO L87 Difference]: Start difference. First operand 10632 states and 15243 transitions. Second operand has 32 states, 32 states have (on average 17.125) internal successors, (548), 31 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:47,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:22:47,192 INFO L93 Difference]: Finished difference Result 20346 states and 29398 transitions. [2021-11-23 17:22:47,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 17:22:47,193 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 17.125) internal successors, (548), 31 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2021-11-23 17:22:47,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:22:47,205 INFO L225 Difference]: With dead ends: 20346 [2021-11-23 17:22:47,205 INFO L226 Difference]: Without dead ends: 10744 [2021-11-23 17:22:47,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1069 GetRequests, 1030 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=232, Invalid=1408, Unknown=0, NotChecked=0, Total=1640 [2021-11-23 17:22:47,216 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 275 mSDsluCounter, 2130 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 2294 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 265 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:22:47,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 2294 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 136 Invalid, 0 Unknown, 265 Unchecked, 0.1s Time] [2021-11-23 17:22:47,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10744 states. [2021-11-23 17:22:47,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10744 to 10740. [2021-11-23 17:22:47,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10740 states, 10739 states have (on average 1.4316975509824006) internal successors, (15375), 10739 states have internal predecessors, (15375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:47,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10740 states to 10740 states and 15375 transitions. [2021-11-23 17:22:47,913 INFO L78 Accepts]: Start accepts. Automaton has 10740 states and 15375 transitions. Word has length 177 [2021-11-23 17:22:47,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:22:47,914 INFO L470 AbstractCegarLoop]: Abstraction has 10740 states and 15375 transitions. [2021-11-23 17:22:47,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 17.125) internal successors, (548), 31 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:47,914 INFO L276 IsEmpty]: Start isEmpty. Operand 10740 states and 15375 transitions. [2021-11-23 17:22:47,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-23 17:22:47,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:22:47,918 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:22:47,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2021-11-23 17:22:48,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (96)] Forceful destruction successful, exit code 0 [2021-11-23 17:22:48,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (95)] Ended with exit code 0 [2021-11-23 17:22:48,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:22:48,518 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:22:48,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:22:48,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1459221531, now seen corresponding path program 1 times [2021-11-23 17:22:48,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:22:48,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [457804110] [2021-11-23 17:22:48,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:22:48,519 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:22:48,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:22:48,520 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:22:48,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (98)] Waiting until timeout for monitored process [2021-11-23 17:22:48,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:22:48,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:22:48,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:22:50,439 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 17:22:50,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:22:50,439 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:22:50,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [457804110] [2021-11-23 17:22:50,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [457804110] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:22:50,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:22:50,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:22:50,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626394201] [2021-11-23 17:22:50,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:22:50,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 17:22:50,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:22:50,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 17:22:50,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:22:50,441 INFO L87 Difference]: Start difference. First operand 10740 states and 15375 transitions. Second operand has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 8 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:51,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:22:51,232 INFO L93 Difference]: Finished difference Result 21102 states and 30298 transitions. [2021-11-23 17:22:51,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 17:22:51,232 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 8 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2021-11-23 17:22:51,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:22:51,244 INFO L225 Difference]: With dead ends: 21102 [2021-11-23 17:22:51,244 INFO L226 Difference]: Without dead ends: 11468 [2021-11-23 17:22:51,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:22:51,249 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 82 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 961 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 224 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:22:51,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 961 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 224 Unchecked, 0.0s Time] [2021-11-23 17:22:51,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11468 states. [2021-11-23 17:22:51,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11468 to 11468. [2021-11-23 17:22:51,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11468 states, 11467 states have (on average 1.415104212086858) internal successors, (16227), 11467 states have internal predecessors, (16227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:51,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11468 states to 11468 states and 16227 transitions. [2021-11-23 17:22:51,961 INFO L78 Accepts]: Start accepts. Automaton has 11468 states and 16227 transitions. Word has length 177 [2021-11-23 17:22:51,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:22:51,961 INFO L470 AbstractCegarLoop]: Abstraction has 11468 states and 16227 transitions. [2021-11-23 17:22:51,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 8 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:51,961 INFO L276 IsEmpty]: Start isEmpty. Operand 11468 states and 16227 transitions. [2021-11-23 17:22:51,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-23 17:22:51,967 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:22:51,967 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:22:51,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (98)] Forceful destruction successful, exit code 0 [2021-11-23 17:22:52,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:22:52,168 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:22:52,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:22:52,168 INFO L85 PathProgramCache]: Analyzing trace with hash -968951766, now seen corresponding path program 1 times [2021-11-23 17:22:52,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:22:52,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [551403819] [2021-11-23 17:22:52,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:22:52,169 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:22:52,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:22:52,170 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:22:52,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (99)] Waiting until timeout for monitored process [2021-11-23 17:22:52,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:22:52,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:22:52,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:22:53,788 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 17:22:53,788 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:22:53,788 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:22:53,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [551403819] [2021-11-23 17:22:53,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [551403819] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:22:53,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:22:53,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:22:53,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587183234] [2021-11-23 17:22:53,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:22:53,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:22:53,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:22:53,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:22:53,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:22:53,790 INFO L87 Difference]: Start difference. First operand 11468 states and 16227 transitions. Second operand has 8 states, 8 states have (on average 21.0) internal successors, (168), 7 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:54,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:22:54,487 INFO L93 Difference]: Finished difference Result 21114 states and 30298 transitions. [2021-11-23 17:22:54,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:22:54,487 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 21.0) internal successors, (168), 7 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2021-11-23 17:22:54,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:22:54,498 INFO L225 Difference]: With dead ends: 21114 [2021-11-23 17:22:54,499 INFO L226 Difference]: Without dead ends: 11468 [2021-11-23 17:22:54,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:22:54,506 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 67 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:22:54,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 679 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 101 Unchecked, 0.0s Time] [2021-11-23 17:22:54,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11468 states. [2021-11-23 17:22:55,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11468 to 11468. [2021-11-23 17:22:55,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11468 states, 11467 states have (on average 1.4123135955350135) internal successors, (16195), 11467 states have internal predecessors, (16195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:55,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11468 states to 11468 states and 16195 transitions. [2021-11-23 17:22:55,230 INFO L78 Accepts]: Start accepts. Automaton has 11468 states and 16195 transitions. Word has length 177 [2021-11-23 17:22:55,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:22:55,230 INFO L470 AbstractCegarLoop]: Abstraction has 11468 states and 16195 transitions. [2021-11-23 17:22:55,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.0) internal successors, (168), 7 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:55,231 INFO L276 IsEmpty]: Start isEmpty. Operand 11468 states and 16195 transitions. [2021-11-23 17:22:55,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-23 17:22:55,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:22:55,237 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:22:55,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (99)] Ended with exit code 0 [2021-11-23 17:22:55,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:22:55,439 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:22:55,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:22:55,439 INFO L85 PathProgramCache]: Analyzing trace with hash 513167419, now seen corresponding path program 1 times [2021-11-23 17:22:55,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:22:55,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [240021134] [2021-11-23 17:22:55,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:22:55,440 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:22:55,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:22:55,441 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:22:55,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (100)] Waiting until timeout for monitored process [2021-11-23 17:22:55,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:22:55,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:22:55,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:22:56,699 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 17:22:56,700 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:22:56,700 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:22:56,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [240021134] [2021-11-23 17:22:56,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [240021134] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:22:56,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:22:56,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:22:56,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640370119] [2021-11-23 17:22:56,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:22:56,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:22:56,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:22:56,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:22:56,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:22:56,703 INFO L87 Difference]: Start difference. First operand 11468 states and 16195 transitions. Second operand has 5 states, 5 states have (on average 34.2) internal successors, (171), 4 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:57,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:22:57,630 INFO L93 Difference]: Finished difference Result 21123 states and 30277 transitions. [2021-11-23 17:22:57,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:22:57,631 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.2) internal successors, (171), 4 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 178 [2021-11-23 17:22:57,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:22:57,645 INFO L225 Difference]: With dead ends: 21123 [2021-11-23 17:22:57,645 INFO L226 Difference]: Without dead ends: 11489 [2021-11-23 17:22:57,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:22:57,655 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 207 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:22:57,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 408 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 124 Invalid, 0 Unknown, 115 Unchecked, 0.1s Time] [2021-11-23 17:22:57,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11489 states. [2021-11-23 17:22:58,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11489 to 10761. [2021-11-23 17:22:58,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10761 states, 10760 states have (on average 1.428438661710037) internal successors, (15370), 10760 states have internal predecessors, (15370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:58,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10761 states to 10761 states and 15370 transitions. [2021-11-23 17:22:58,539 INFO L78 Accepts]: Start accepts. Automaton has 10761 states and 15370 transitions. Word has length 178 [2021-11-23 17:22:58,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:22:58,540 INFO L470 AbstractCegarLoop]: Abstraction has 10761 states and 15370 transitions. [2021-11-23 17:22:58,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.2) internal successors, (171), 4 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:58,540 INFO L276 IsEmpty]: Start isEmpty. Operand 10761 states and 15370 transitions. [2021-11-23 17:22:58,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-23 17:22:58,544 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:22:58,544 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:22:58,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (100)] Forceful destruction successful, exit code 0 [2021-11-23 17:22:58,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:22:58,745 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:22:58,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:22:58,745 INFO L85 PathProgramCache]: Analyzing trace with hash 220279802, now seen corresponding path program 1 times [2021-11-23 17:22:58,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:22:58,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [369155460] [2021-11-23 17:22:58,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:22:58,746 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:22:58,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:22:58,746 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:22:58,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (101)] Waiting until timeout for monitored process [2021-11-23 17:22:59,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:22:59,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:22:59,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:22:59,342 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 17:22:59,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:22:59,342 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:22:59,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [369155460] [2021-11-23 17:22:59,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [369155460] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:22:59,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:22:59,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:22:59,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322824528] [2021-11-23 17:22:59,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:22:59,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:22:59,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:22:59,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:22:59,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:22:59,344 INFO L87 Difference]: Start difference. First operand 10761 states and 15370 transitions. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:00,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:23:00,282 INFO L93 Difference]: Finished difference Result 20401 states and 29433 transitions. [2021-11-23 17:23:00,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:23:00,282 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 178 [2021-11-23 17:23:00,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:23:00,296 INFO L225 Difference]: With dead ends: 20401 [2021-11-23 17:23:00,297 INFO L226 Difference]: Without dead ends: 10761 [2021-11-23 17:23:00,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 176 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 17:23:00,307 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 158 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:23:00,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 268 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:23:00,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10761 states. [2021-11-23 17:23:01,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10761 to 10761. [2021-11-23 17:23:01,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10761 states, 10760 states have (on average 1.4179368029739776) internal successors, (15257), 10760 states have internal predecessors, (15257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:01,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10761 states to 10761 states and 15257 transitions. [2021-11-23 17:23:01,399 INFO L78 Accepts]: Start accepts. Automaton has 10761 states and 15257 transitions. Word has length 178 [2021-11-23 17:23:01,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:23:01,400 INFO L470 AbstractCegarLoop]: Abstraction has 10761 states and 15257 transitions. [2021-11-23 17:23:01,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:01,400 INFO L276 IsEmpty]: Start isEmpty. Operand 10761 states and 15257 transitions. [2021-11-23 17:23:01,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-23 17:23:01,404 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:23:01,404 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:23:01,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (101)] Forceful destruction successful, exit code 0 [2021-11-23 17:23:01,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:23:01,605 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:23:01,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:23:01,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1417806072, now seen corresponding path program 1 times [2021-11-23 17:23:01,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:23:01,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [901326349] [2021-11-23 17:23:01,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:23:01,606 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:23:01,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:23:01,608 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:23:01,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (102)] Waiting until timeout for monitored process [2021-11-23 17:23:01,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:23:01,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:23:01,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:23:05,402 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:23:05,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:23:06,114 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:23:06,114 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:23:06,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [901326349] [2021-11-23 17:23:06,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [901326349] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:23:06,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [396967328] [2021-11-23 17:23:06,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:23:06,115 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:23:06,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:23:06,116 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:23:06,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (103)] Waiting until timeout for monitored process [2021-11-23 17:23:06,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:23:06,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:23:06,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:23:10,790 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:23:10,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:23:11,355 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:23:11,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [396967328] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:23:11,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687977848] [2021-11-23 17:23:11,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:23:11,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:23:11,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:23:11,371 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:23:11,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-11-23 17:23:11,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:23:11,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:23:11,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:23:14,581 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:23:14,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:23:15,568 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:23:15,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687977848] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:23:15,569 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:23:15,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 8, 8] total 31 [2021-11-23 17:23:15,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625401108] [2021-11-23 17:23:15,569 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:23:15,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-23 17:23:15,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:23:15,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-23 17:23:15,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2021-11-23 17:23:15,571 INFO L87 Difference]: Start difference. First operand 10761 states and 15257 transitions. Second operand has 32 states, 32 states have (on average 17.71875) internal successors, (567), 31 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:16,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:23:16,973 INFO L93 Difference]: Finished difference Result 20927 states and 29820 transitions. [2021-11-23 17:23:16,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 17:23:16,973 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 17.71875) internal successors, (567), 31 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 178 [2021-11-23 17:23:16,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:23:16,986 INFO L225 Difference]: With dead ends: 20927 [2021-11-23 17:23:16,986 INFO L226 Difference]: Without dead ends: 11325 [2021-11-23 17:23:16,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1074 GetRequests, 1035 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=238, Invalid=1402, Unknown=0, NotChecked=0, Total=1640 [2021-11-23 17:23:16,994 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 173 mSDsluCounter, 2555 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 2720 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 532 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:23:16,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 2720 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 281 Invalid, 0 Unknown, 532 Unchecked, 0.2s Time] [2021-11-23 17:23:17,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11325 states. [2021-11-23 17:23:17,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11325 to 11117. [2021-11-23 17:23:17,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11117 states, 11116 states have (on average 1.4108492263404102) internal successors, (15683), 11116 states have internal predecessors, (15683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:17,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11117 states to 11117 states and 15683 transitions. [2021-11-23 17:23:17,747 INFO L78 Accepts]: Start accepts. Automaton has 11117 states and 15683 transitions. Word has length 178 [2021-11-23 17:23:17,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:23:17,747 INFO L470 AbstractCegarLoop]: Abstraction has 11117 states and 15683 transitions. [2021-11-23 17:23:17,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 17.71875) internal successors, (567), 31 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:17,748 INFO L276 IsEmpty]: Start isEmpty. Operand 11117 states and 15683 transitions. [2021-11-23 17:23:17,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-23 17:23:17,751 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:23:17,751 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:23:17,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-11-23 17:23:17,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (103)] Forceful destruction successful, exit code 0 [2021-11-23 17:23:18,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (102)] Forceful destruction successful, exit code 0 [2021-11-23 17:23:18,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:23:18,355 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:23:18,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:23:18,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1128830429, now seen corresponding path program 1 times [2021-11-23 17:23:18,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:23:18,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1999412682] [2021-11-23 17:23:18,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:23:18,356 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:23:18,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:23:18,357 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:23:18,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (105)] Waiting until timeout for monitored process [2021-11-23 17:23:18,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:23:18,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:23:18,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:23:18,927 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:23:18,927 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:23:18,927 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:23:18,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1999412682] [2021-11-23 17:23:18,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1999412682] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:23:18,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:23:18,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:23:18,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284497227] [2021-11-23 17:23:18,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:23:18,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:23:18,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:23:18,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:23:18,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:23:18,928 INFO L87 Difference]: Start difference. First operand 11117 states and 15683 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:19,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:23:19,501 INFO L93 Difference]: Finished difference Result 15921 states and 22645 transitions. [2021-11-23 17:23:19,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:23:19,502 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 178 [2021-11-23 17:23:19,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:23:19,510 INFO L225 Difference]: With dead ends: 15921 [2021-11-23 17:23:19,510 INFO L226 Difference]: Without dead ends: 6319 [2021-11-23 17:23:19,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 176 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 17:23:19,517 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 94 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:23:19,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 442 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:23:19,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6319 states. [2021-11-23 17:23:20,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6319 to 6317. [2021-11-23 17:23:20,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6317 states, 6316 states have (on average 1.372545915136162) internal successors, (8669), 6316 states have internal predecessors, (8669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:20,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6317 states to 6317 states and 8669 transitions. [2021-11-23 17:23:20,098 INFO L78 Accepts]: Start accepts. Automaton has 6317 states and 8669 transitions. Word has length 178 [2021-11-23 17:23:20,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:23:20,099 INFO L470 AbstractCegarLoop]: Abstraction has 6317 states and 8669 transitions. [2021-11-23 17:23:20,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:20,099 INFO L276 IsEmpty]: Start isEmpty. Operand 6317 states and 8669 transitions. [2021-11-23 17:23:20,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-23 17:23:20,101 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:23:20,102 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:23:20,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (105)] Forceful destruction successful, exit code 0 [2021-11-23 17:23:20,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:23:20,302 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:23:20,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:23:20,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1129343293, now seen corresponding path program 1 times [2021-11-23 17:23:20,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:23:20,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [512670414] [2021-11-23 17:23:20,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:23:20,303 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:23:20,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:23:20,304 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:23:20,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (106)] Waiting until timeout for monitored process [2021-11-23 17:23:20,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:23:20,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:23:20,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:23:20,962 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 17:23:20,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:23:20,963 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:23:20,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [512670414] [2021-11-23 17:23:20,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [512670414] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:23:20,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:23:20,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:23:20,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166682031] [2021-11-23 17:23:20,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:23:20,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:23:20,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:23:20,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:23:20,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:23:20,964 INFO L87 Difference]: Start difference. First operand 6317 states and 8669 transitions. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:21,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:23:21,632 INFO L93 Difference]: Finished difference Result 11133 states and 15596 transitions. [2021-11-23 17:23:21,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:23:21,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 178 [2021-11-23 17:23:21,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:23:21,641 INFO L225 Difference]: With dead ends: 11133 [2021-11-23 17:23:21,641 INFO L226 Difference]: Without dead ends: 6317 [2021-11-23 17:23:21,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 176 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 17:23:21,646 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 149 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:23:21,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 192 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:23:21,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6317 states. [2021-11-23 17:23:22,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6317 to 6317. [2021-11-23 17:23:22,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6317 states, 6316 states have (on average 1.3636795440151994) internal successors, (8613), 6316 states have internal predecessors, (8613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:22,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6317 states to 6317 states and 8613 transitions. [2021-11-23 17:23:22,320 INFO L78 Accepts]: Start accepts. Automaton has 6317 states and 8613 transitions. Word has length 178 [2021-11-23 17:23:22,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:23:22,320 INFO L470 AbstractCegarLoop]: Abstraction has 6317 states and 8613 transitions. [2021-11-23 17:23:22,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:22,320 INFO L276 IsEmpty]: Start isEmpty. Operand 6317 states and 8613 transitions. [2021-11-23 17:23:22,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-23 17:23:22,323 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:23:22,323 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:23:22,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (106)] Forceful destruction successful, exit code 0 [2021-11-23 17:23:22,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:23:22,526 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:23:22,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:23:22,526 INFO L85 PathProgramCache]: Analyzing trace with hash -532058461, now seen corresponding path program 1 times [2021-11-23 17:23:22,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:23:22,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [475107537] [2021-11-23 17:23:22,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:23:22,527 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:23:22,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:23:22,529 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:23:22,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (107)] Waiting until timeout for monitored process [2021-11-23 17:23:22,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:23:22,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:23:22,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:23:23,198 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 17:23:23,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:23:23,199 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:23:23,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [475107537] [2021-11-23 17:23:23,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [475107537] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:23:23,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:23:23,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:23:23,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189155214] [2021-11-23 17:23:23,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:23:23,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:23:23,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:23:23,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:23:23,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:23:23,201 INFO L87 Difference]: Start difference. First operand 6317 states and 8613 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:23,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:23:23,908 INFO L93 Difference]: Finished difference Result 11139 states and 15499 transitions. [2021-11-23 17:23:23,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:23:23,909 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 178 [2021-11-23 17:23:23,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:23:23,917 INFO L225 Difference]: With dead ends: 11139 [2021-11-23 17:23:23,917 INFO L226 Difference]: Without dead ends: 6317 [2021-11-23 17:23:23,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 176 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 17:23:23,924 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 150 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:23:23,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 210 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:23:23,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6317 states. [2021-11-23 17:23:24,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6317 to 6317. [2021-11-23 17:23:24,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6317 states, 6316 states have (on average 1.354179860671311) internal successors, (8553), 6316 states have internal predecessors, (8553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:24,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6317 states to 6317 states and 8553 transitions. [2021-11-23 17:23:24,467 INFO L78 Accepts]: Start accepts. Automaton has 6317 states and 8553 transitions. Word has length 178 [2021-11-23 17:23:24,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:23:24,467 INFO L470 AbstractCegarLoop]: Abstraction has 6317 states and 8553 transitions. [2021-11-23 17:23:24,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:24,467 INFO L276 IsEmpty]: Start isEmpty. Operand 6317 states and 8553 transitions. [2021-11-23 17:23:24,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-23 17:23:24,470 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:23:24,470 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:23:24,480 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (107)] Ended with exit code 0 [2021-11-23 17:23:24,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:23:24,672 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:23:24,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:23:24,673 INFO L85 PathProgramCache]: Analyzing trace with hash -274090743, now seen corresponding path program 1 times [2021-11-23 17:23:24,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:23:24,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [711793898] [2021-11-23 17:23:24,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:23:24,674 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:23:24,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:23:24,676 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:23:24,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (108)] Waiting until timeout for monitored process [2021-11-23 17:23:25,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:23:25,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:23:25,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:23:25,325 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 17:23:25,325 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:23:25,325 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:23:25,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [711793898] [2021-11-23 17:23:25,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [711793898] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:23:25,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:23:25,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:23:25,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680533068] [2021-11-23 17:23:25,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:23:25,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:23:25,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:23:25,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:23:25,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:23:25,327 INFO L87 Difference]: Start difference. First operand 6317 states and 8553 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:26,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:23:26,022 INFO L93 Difference]: Finished difference Result 11145 states and 15398 transitions. [2021-11-23 17:23:26,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:23:26,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 178 [2021-11-23 17:23:26,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:23:26,030 INFO L225 Difference]: With dead ends: 11145 [2021-11-23 17:23:26,030 INFO L226 Difference]: Without dead ends: 6317 [2021-11-23 17:23:26,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 176 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 17:23:26,035 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 151 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:23:26,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 228 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:23:26,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6317 states. [2021-11-23 17:23:26,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6317 to 6317. [2021-11-23 17:23:26,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6317 states, 6316 states have (on average 1.3434135528815707) internal successors, (8485), 6316 states have internal predecessors, (8485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:26,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6317 states to 6317 states and 8485 transitions. [2021-11-23 17:23:26,724 INFO L78 Accepts]: Start accepts. Automaton has 6317 states and 8485 transitions. Word has length 178 [2021-11-23 17:23:26,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:23:26,724 INFO L470 AbstractCegarLoop]: Abstraction has 6317 states and 8485 transitions. [2021-11-23 17:23:26,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:26,725 INFO L276 IsEmpty]: Start isEmpty. Operand 6317 states and 8485 transitions. [2021-11-23 17:23:26,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-23 17:23:26,727 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:23:26,727 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:23:26,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (108)] Forceful destruction successful, exit code 0 [2021-11-23 17:23:26,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:23:26,931 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:23:26,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:23:26,931 INFO L85 PathProgramCache]: Analyzing trace with hash 120015319, now seen corresponding path program 1 times [2021-11-23 17:23:26,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:23:26,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [15838257] [2021-11-23 17:23:26,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:23:26,932 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:23:26,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:23:26,933 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:23:26,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (109)] Waiting until timeout for monitored process [2021-11-23 17:23:27,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:23:27,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:23:27,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:23:27,565 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 17:23:27,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:23:27,566 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:23:27,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [15838257] [2021-11-23 17:23:27,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [15838257] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:23:27,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:23:27,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:23:27,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533485418] [2021-11-23 17:23:27,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:23:27,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:23:27,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:23:27,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:23:27,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:23:27,567 INFO L87 Difference]: Start difference. First operand 6317 states and 8485 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:28,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:23:28,306 INFO L93 Difference]: Finished difference Result 11151 states and 15289 transitions. [2021-11-23 17:23:28,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:23:28,307 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 178 [2021-11-23 17:23:28,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:23:28,315 INFO L225 Difference]: With dead ends: 11151 [2021-11-23 17:23:28,315 INFO L226 Difference]: Without dead ends: 6317 [2021-11-23 17:23:28,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 176 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 17:23:28,320 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 152 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:23:28,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 246 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:23:28,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6317 states. [2021-11-23 17:23:28,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6317 to 6317. [2021-11-23 17:23:28,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6317 states, 6316 states have (on average 1.3301139962001267) internal successors, (8401), 6316 states have internal predecessors, (8401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:28,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6317 states to 6317 states and 8401 transitions. [2021-11-23 17:23:28,967 INFO L78 Accepts]: Start accepts. Automaton has 6317 states and 8401 transitions. Word has length 178 [2021-11-23 17:23:28,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:23:28,967 INFO L470 AbstractCegarLoop]: Abstraction has 6317 states and 8401 transitions. [2021-11-23 17:23:28,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:28,967 INFO L276 IsEmpty]: Start isEmpty. Operand 6317 states and 8401 transitions. [2021-11-23 17:23:28,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-23 17:23:28,970 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:23:28,970 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:23:28,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (109)] Forceful destruction successful, exit code 0 [2021-11-23 17:23:29,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:23:29,171 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:23:29,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:23:29,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1675916654, now seen corresponding path program 1 times [2021-11-23 17:23:29,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:23:29,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1596282440] [2021-11-23 17:23:29,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:23:29,172 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:23:29,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:23:29,173 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:23:29,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (110)] Waiting until timeout for monitored process [2021-11-23 17:23:29,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:23:29,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:23:29,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:23:29,820 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 17:23:29,820 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:23:29,820 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:23:29,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1596282440] [2021-11-23 17:23:29,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1596282440] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:23:29,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:23:29,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:23:29,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697705292] [2021-11-23 17:23:29,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:23:29,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:23:29,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:23:29,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:23:29,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:23:29,823 INFO L87 Difference]: Start difference. First operand 6317 states and 8401 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:30,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:23:30,633 INFO L93 Difference]: Finished difference Result 11163 states and 15171 transitions. [2021-11-23 17:23:30,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:23:30,634 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 178 [2021-11-23 17:23:30,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:23:30,642 INFO L225 Difference]: With dead ends: 11163 [2021-11-23 17:23:30,642 INFO L226 Difference]: Without dead ends: 6317 [2021-11-23 17:23:30,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 176 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 17:23:30,648 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 149 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:23:30,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 274 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:23:30,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6317 states. [2021-11-23 17:23:31,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6317 to 6317. [2021-11-23 17:23:31,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6317 states, 6316 states have (on average 1.3174477517416086) internal successors, (8321), 6316 states have internal predecessors, (8321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:31,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6317 states to 6317 states and 8321 transitions. [2021-11-23 17:23:31,316 INFO L78 Accepts]: Start accepts. Automaton has 6317 states and 8321 transitions. Word has length 178 [2021-11-23 17:23:31,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:23:31,316 INFO L470 AbstractCegarLoop]: Abstraction has 6317 states and 8321 transitions. [2021-11-23 17:23:31,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:31,316 INFO L276 IsEmpty]: Start isEmpty. Operand 6317 states and 8321 transitions. [2021-11-23 17:23:31,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-23 17:23:31,319 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:23:31,319 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:23:31,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (110)] Forceful destruction successful, exit code 0 [2021-11-23 17:23:31,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:23:31,519 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:23:31,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:23:31,520 INFO L85 PathProgramCache]: Analyzing trace with hash -141480642, now seen corresponding path program 1 times [2021-11-23 17:23:31,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:23:31,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1789396403] [2021-11-23 17:23:31,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:23:31,521 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:23:31,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:23:31,535 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:23:31,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (111)] Waiting until timeout for monitored process [2021-11-23 17:23:31,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:23:31,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:23:31,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:23:32,888 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 17:23:32,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:23:32,888 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:23:32,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1789396403] [2021-11-23 17:23:32,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1789396403] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:23:32,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:23:32,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:23:32,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369172976] [2021-11-23 17:23:32,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:23:32,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:23:32,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:23:32,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:23:32,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:23:32,890 INFO L87 Difference]: Start difference. First operand 6317 states and 8321 transitions. Second operand has 5 states, 5 states have (on average 34.8) internal successors, (174), 4 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:33,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:23:33,595 INFO L93 Difference]: Finished difference Result 11299 states and 15203 transitions. [2021-11-23 17:23:33,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:23:33,595 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.8) internal successors, (174), 4 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 178 [2021-11-23 17:23:33,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:23:33,603 INFO L225 Difference]: With dead ends: 11299 [2021-11-23 17:23:33,603 INFO L226 Difference]: Without dead ends: 6393 [2021-11-23 17:23:33,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:23:33,611 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 186 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:23:33,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 405 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 94 Invalid, 0 Unknown, 109 Unchecked, 0.1s Time] [2021-11-23 17:23:33,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6393 states. [2021-11-23 17:23:34,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6393 to 6393. [2021-11-23 17:23:34,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6393 states, 6392 states have (on average 1.3149249061326658) internal successors, (8405), 6392 states have internal predecessors, (8405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:34,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6393 states to 6393 states and 8405 transitions. [2021-11-23 17:23:34,304 INFO L78 Accepts]: Start accepts. Automaton has 6393 states and 8405 transitions. Word has length 178 [2021-11-23 17:23:34,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:23:34,305 INFO L470 AbstractCegarLoop]: Abstraction has 6393 states and 8405 transitions. [2021-11-23 17:23:34,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.8) internal successors, (174), 4 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:34,305 INFO L276 IsEmpty]: Start isEmpty. Operand 6393 states and 8405 transitions. [2021-11-23 17:23:34,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-23 17:23:34,309 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:23:34,309 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:23:34,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (111)] Forceful destruction successful, exit code 0 [2021-11-23 17:23:34,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:23:34,523 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:23:34,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:23:34,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1836828999, now seen corresponding path program 1 times [2021-11-23 17:23:34,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:23:34,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1709922237] [2021-11-23 17:23:34,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:23:34,524 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:23:34,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:23:34,525 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:23:34,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (112)] Waiting until timeout for monitored process [2021-11-23 17:23:34,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:23:34,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:23:34,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:23:36,125 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:23:36,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:23:36,968 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:23:36,968 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:23:36,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1709922237] [2021-11-23 17:23:36,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1709922237] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:23:36,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [870651101] [2021-11-23 17:23:36,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:23:36,968 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:23:36,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:23:36,969 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:23:36,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (113)] Waiting until timeout for monitored process [2021-11-23 17:23:37,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:23:37,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:23:37,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:23:38,926 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:23:38,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:23:39,799 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:23:39,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [870651101] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:23:39,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637011712] [2021-11-23 17:23:39,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:23:39,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:23:39,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:23:39,811 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:23:39,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-11-23 17:23:40,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:23:40,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:23:40,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:23:41,860 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:23:41,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:23:42,894 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:23:42,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637011712] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:23:42,895 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:23:42,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 17:23:42,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972078670] [2021-11-23 17:23:42,895 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:23:42,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 17:23:42,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:23:42,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 17:23:42,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:23:42,896 INFO L87 Difference]: Start difference. First operand 6393 states and 8405 transitions. Second operand has 16 states, 16 states have (on average 20.375) internal successors, (326), 15 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:44,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:23:44,066 INFO L93 Difference]: Finished difference Result 13449 states and 18209 transitions. [2021-11-23 17:23:44,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 17:23:44,066 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 20.375) internal successors, (326), 15 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 178 [2021-11-23 17:23:44,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:23:44,076 INFO L225 Difference]: With dead ends: 13449 [2021-11-23 17:23:44,076 INFO L226 Difference]: Without dead ends: 8633 [2021-11-23 17:23:44,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1066 GetRequests, 1048 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-11-23 17:23:44,081 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 215 mSDsluCounter, 1793 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 2055 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 296 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:23:44,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 2055 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 259 Invalid, 0 Unknown, 296 Unchecked, 0.2s Time] [2021-11-23 17:23:44,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8633 states. [2021-11-23 17:23:44,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8633 to 6283. [2021-11-23 17:23:44,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6283 states, 6282 states have (on average 1.320280165552372) internal successors, (8294), 6282 states have internal predecessors, (8294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:44,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6283 states to 6283 states and 8294 transitions. [2021-11-23 17:23:44,716 INFO L78 Accepts]: Start accepts. Automaton has 6283 states and 8294 transitions. Word has length 178 [2021-11-23 17:23:44,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:23:44,717 INFO L470 AbstractCegarLoop]: Abstraction has 6283 states and 8294 transitions. [2021-11-23 17:23:44,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 20.375) internal successors, (326), 15 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:44,717 INFO L276 IsEmpty]: Start isEmpty. Operand 6283 states and 8294 transitions. [2021-11-23 17:23:44,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-23 17:23:44,719 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:23:44,720 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:23:44,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (113)] Forceful destruction successful, exit code 0 [2021-11-23 17:23:44,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (112)] Forceful destruction successful, exit code 0 [2021-11-23 17:23:45,143 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2021-11-23 17:23:45,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:23:45,320 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:23:45,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:23:45,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1754805840, now seen corresponding path program 1 times [2021-11-23 17:23:45,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:23:45,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1248952399] [2021-11-23 17:23:45,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:23:45,322 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:23:45,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:23:45,323 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:23:45,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (115)] Waiting until timeout for monitored process [2021-11-23 17:23:45,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:23:45,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:23:45,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:23:46,546 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 17:23:46,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:23:46,547 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:23:46,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1248952399] [2021-11-23 17:23:46,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1248952399] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:23:46,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:23:46,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:23:46,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347849806] [2021-11-23 17:23:46,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:23:46,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:23:46,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:23:46,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:23:46,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:23:46,548 INFO L87 Difference]: Start difference. First operand 6283 states and 8294 transitions. Second operand has 5 states, 5 states have (on average 34.6) internal successors, (173), 4 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:47,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:23:47,263 INFO L93 Difference]: Finished difference Result 11297 states and 15204 transitions. [2021-11-23 17:23:47,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:23:47,264 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.6) internal successors, (173), 4 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 178 [2021-11-23 17:23:47,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:23:47,270 INFO L225 Difference]: With dead ends: 11297 [2021-11-23 17:23:47,270 INFO L226 Difference]: Without dead ends: 6283 [2021-11-23 17:23:47,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:23:47,274 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 187 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:23:47,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 406 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 100 Invalid, 0 Unknown, 108 Unchecked, 0.1s Time] [2021-11-23 17:23:47,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6283 states. [2021-11-23 17:23:47,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6283 to 6091. [2021-11-23 17:23:47,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6091 states, 6090 states have (on average 1.3284072249589491) internal successors, (8090), 6090 states have internal predecessors, (8090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:47,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6091 states to 6091 states and 8090 transitions. [2021-11-23 17:23:47,833 INFO L78 Accepts]: Start accepts. Automaton has 6091 states and 8090 transitions. Word has length 178 [2021-11-23 17:23:47,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:23:47,833 INFO L470 AbstractCegarLoop]: Abstraction has 6091 states and 8090 transitions. [2021-11-23 17:23:47,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.6) internal successors, (173), 4 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:47,834 INFO L276 IsEmpty]: Start isEmpty. Operand 6091 states and 8090 transitions. [2021-11-23 17:23:47,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-23 17:23:47,836 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:23:47,836 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:23:47,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (115)] Forceful destruction successful, exit code 0 [2021-11-23 17:23:48,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:23:48,037 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:23:48,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:23:48,037 INFO L85 PathProgramCache]: Analyzing trace with hash -693100066, now seen corresponding path program 1 times [2021-11-23 17:23:48,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:23:48,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1218280947] [2021-11-23 17:23:48,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:23:48,038 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:23:48,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:23:48,039 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:23:48,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (116)] Waiting until timeout for monitored process [2021-11-23 17:23:48,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:23:48,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:23:48,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:23:49,354 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 17:23:49,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:23:49,354 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:23:49,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1218280947] [2021-11-23 17:23:49,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1218280947] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:23:49,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:23:49,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:23:49,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832514752] [2021-11-23 17:23:49,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:23:49,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:23:49,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:23:49,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:23:49,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:23:49,355 INFO L87 Difference]: Start difference. First operand 6091 states and 8090 transitions. Second operand has 5 states, 5 states have (on average 34.4) internal successors, (172), 4 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:49,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:23:49,893 INFO L93 Difference]: Finished difference Result 11095 states and 14988 transitions. [2021-11-23 17:23:49,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:23:49,893 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.4) internal successors, (172), 4 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 178 [2021-11-23 17:23:49,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:23:49,899 INFO L225 Difference]: With dead ends: 11095 [2021-11-23 17:23:49,899 INFO L226 Difference]: Without dead ends: 5993 [2021-11-23 17:23:49,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:23:49,904 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 85 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:23:49,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 460 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 106 Unchecked, 0.0s Time] [2021-11-23 17:23:49,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5993 states. [2021-11-23 17:23:50,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5993 to 5521. [2021-11-23 17:23:50,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5521 states, 5520 states have (on average 1.352536231884058) internal successors, (7466), 5520 states have internal predecessors, (7466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:50,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5521 states to 5521 states and 7466 transitions. [2021-11-23 17:23:50,437 INFO L78 Accepts]: Start accepts. Automaton has 5521 states and 7466 transitions. Word has length 178 [2021-11-23 17:23:50,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:23:50,437 INFO L470 AbstractCegarLoop]: Abstraction has 5521 states and 7466 transitions. [2021-11-23 17:23:50,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.4) internal successors, (172), 4 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:50,437 INFO L276 IsEmpty]: Start isEmpty. Operand 5521 states and 7466 transitions. [2021-11-23 17:23:50,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-23 17:23:50,439 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:23:50,439 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:23:50,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (116)] Forceful destruction successful, exit code 0 [2021-11-23 17:23:50,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:23:50,640 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:23:50,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:23:50,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1433660179, now seen corresponding path program 1 times [2021-11-23 17:23:50,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:23:50,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1389767194] [2021-11-23 17:23:50,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:23:50,641 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:23:50,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:23:50,646 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:23:50,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (117)] Waiting until timeout for monitored process [2021-11-23 17:23:50,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:23:50,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:23:50,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:23:51,756 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 17:23:51,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:23:51,756 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:23:51,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1389767194] [2021-11-23 17:23:51,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1389767194] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:23:51,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:23:51,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:23:51,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851534828] [2021-11-23 17:23:51,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:23:51,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:23:51,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:23:51,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:23:51,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:23:51,758 INFO L87 Difference]: Start difference. First operand 5521 states and 7466 transitions. Second operand has 5 states, 5 states have (on average 34.0) internal successors, (170), 4 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:52,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:23:52,255 INFO L93 Difference]: Finished difference Result 10403 states and 14225 transitions. [2021-11-23 17:23:52,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:23:52,255 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.0) internal successors, (170), 4 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 178 [2021-11-23 17:23:52,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:23:52,261 INFO L225 Difference]: With dead ends: 10403 [2021-11-23 17:23:52,261 INFO L226 Difference]: Without dead ends: 5374 [2021-11-23 17:23:52,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:23:52,265 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 71 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:23:52,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 553 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 125 Unchecked, 0.1s Time] [2021-11-23 17:23:52,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5374 states. [2021-11-23 17:23:52,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5374 to 5272. [2021-11-23 17:23:52,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5272 states, 5271 states have (on average 1.3627395181180042) internal successors, (7183), 5271 states have internal predecessors, (7183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:52,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5272 states to 5272 states and 7183 transitions. [2021-11-23 17:23:52,704 INFO L78 Accepts]: Start accepts. Automaton has 5272 states and 7183 transitions. Word has length 178 [2021-11-23 17:23:52,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:23:52,705 INFO L470 AbstractCegarLoop]: Abstraction has 5272 states and 7183 transitions. [2021-11-23 17:23:52,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.0) internal successors, (170), 4 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:52,705 INFO L276 IsEmpty]: Start isEmpty. Operand 5272 states and 7183 transitions. [2021-11-23 17:23:52,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-23 17:23:52,706 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:23:52,707 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:23:52,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (117)] Forceful destruction successful, exit code 0 [2021-11-23 17:23:52,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:23:52,907 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:23:52,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:23:52,908 INFO L85 PathProgramCache]: Analyzing trace with hash -2067117931, now seen corresponding path program 1 times [2021-11-23 17:23:52,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:23:52,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1300379567] [2021-11-23 17:23:52,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:23:52,908 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:23:52,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:23:52,909 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:23:52,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (118)] Waiting until timeout for monitored process [2021-11-23 17:23:53,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:23:53,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:23:53,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:23:54,481 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 17:23:54,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:23:54,481 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:23:54,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1300379567] [2021-11-23 17:23:54,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1300379567] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:23:54,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:23:54,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:23:54,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804100204] [2021-11-23 17:23:54,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:23:54,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:23:54,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:23:54,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:23:54,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:23:54,482 INFO L87 Difference]: Start difference. First operand 5272 states and 7183 transitions. Second operand has 8 states, 8 states have (on average 21.125) internal successors, (169), 7 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:55,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:23:55,066 INFO L93 Difference]: Finished difference Result 10074 states and 13856 transitions. [2021-11-23 17:23:55,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:23:55,067 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 21.125) internal successors, (169), 7 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 178 [2021-11-23 17:23:55,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:23:55,072 INFO L225 Difference]: With dead ends: 10074 [2021-11-23 17:23:55,072 INFO L226 Difference]: Without dead ends: 5228 [2021-11-23 17:23:55,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:23:55,074 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 56 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 238 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:23:55,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 998 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 238 Unchecked, 0.1s Time] [2021-11-23 17:23:55,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5228 states. [2021-11-23 17:23:55,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5228 to 5228. [2021-11-23 17:23:55,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5228 states, 5227 states have (on average 1.3644537975894395) internal successors, (7132), 5227 states have internal predecessors, (7132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:55,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5228 states to 5228 states and 7132 transitions. [2021-11-23 17:23:55,507 INFO L78 Accepts]: Start accepts. Automaton has 5228 states and 7132 transitions. Word has length 178 [2021-11-23 17:23:55,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:23:55,507 INFO L470 AbstractCegarLoop]: Abstraction has 5228 states and 7132 transitions. [2021-11-23 17:23:55,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.125) internal successors, (169), 7 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:55,507 INFO L276 IsEmpty]: Start isEmpty. Operand 5228 states and 7132 transitions. [2021-11-23 17:23:55,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-23 17:23:55,508 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:23:55,509 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:23:55,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (118)] Forceful destruction successful, exit code 0 [2021-11-23 17:23:55,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:23:55,709 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:23:55,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:23:55,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1773022290, now seen corresponding path program 1 times [2021-11-23 17:23:55,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:23:55,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [881420980] [2021-11-23 17:23:55,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:23:55,710 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:23:55,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:23:55,711 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:23:55,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (119)] Waiting until timeout for monitored process [2021-11-23 17:23:56,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:23:56,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:23:56,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:23:56,260 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:23:56,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:23:56,261 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:23:56,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [881420980] [2021-11-23 17:23:56,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [881420980] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:23:56,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:23:56,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:23:56,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920032274] [2021-11-23 17:23:56,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:23:56,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:23:56,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:23:56,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:23:56,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:23:56,262 INFO L87 Difference]: Start difference. First operand 5228 states and 7132 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:56,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:23:56,539 INFO L93 Difference]: Finished difference Result 7632 states and 10470 transitions. [2021-11-23 17:23:56,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:23:56,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 179 [2021-11-23 17:23:56,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:23:56,543 INFO L225 Difference]: With dead ends: 7632 [2021-11-23 17:23:56,543 INFO L226 Difference]: Without dead ends: 2830 [2021-11-23 17:23:56,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 177 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 17:23:56,546 INFO L933 BasicCegarLoop]: 264 mSDtfsCounter, 88 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:23:56,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 419 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:23:56,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2830 states. [2021-11-23 17:23:56,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2830 to 2828. [2021-11-23 17:23:56,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2828 states, 2827 states have (on average 1.3335691545808277) internal successors, (3770), 2827 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:56,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 3770 transitions. [2021-11-23 17:23:56,800 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 3770 transitions. Word has length 179 [2021-11-23 17:23:56,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:23:56,801 INFO L470 AbstractCegarLoop]: Abstraction has 2828 states and 3770 transitions. [2021-11-23 17:23:56,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:56,801 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 3770 transitions. [2021-11-23 17:23:56,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-23 17:23:56,802 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:23:56,802 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:23:56,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (119)] Forceful destruction successful, exit code 0 [2021-11-23 17:23:57,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:23:57,002 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:23:57,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:23:57,003 INFO L85 PathProgramCache]: Analyzing trace with hash -187818130, now seen corresponding path program 1 times [2021-11-23 17:23:57,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:23:57,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [148328490] [2021-11-23 17:23:57,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:23:57,003 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:23:57,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:23:57,004 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:23:57,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (120)] Waiting until timeout for monitored process [2021-11-23 17:23:57,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:23:57,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:23:57,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:24:00,093 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:24:00,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:24:00,784 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:24:00,784 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:24:00,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [148328490] [2021-11-23 17:24:00,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [148328490] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:24:00,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1044603526] [2021-11-23 17:24:00,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:24:00,785 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:24:00,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:24:00,785 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:24:00,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (121)] Waiting until timeout for monitored process [2021-11-23 17:24:01,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:24:01,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:24:01,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:24:03,948 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:24:03,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:24:04,402 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:24:04,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1044603526] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:24:04,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518379194] [2021-11-23 17:24:04,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:24:04,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:24:04,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:24:04,403 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:24:04,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-11-23 17:24:04,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:24:04,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:24:04,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:24:07,224 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:24:07,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:24:08,139 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:24:08,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518379194] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:24:08,139 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:24:08,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 8, 8] total 31 [2021-11-23 17:24:08,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805749360] [2021-11-23 17:24:08,140 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:24:08,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-23 17:24:08,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:24:08,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-23 17:24:08,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2021-11-23 17:24:08,141 INFO L87 Difference]: Start difference. First operand 2828 states and 3770 transitions. Second operand has 32 states, 32 states have (on average 18.09375) internal successors, (579), 31 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:24:08,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:24:08,861 INFO L93 Difference]: Finished difference Result 5584 states and 7481 transitions. [2021-11-23 17:24:08,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 17:24:08,862 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 18.09375) internal successors, (579), 31 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 179 [2021-11-23 17:24:08,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:24:08,865 INFO L225 Difference]: With dead ends: 5584 [2021-11-23 17:24:08,865 INFO L226 Difference]: Without dead ends: 3182 [2021-11-23 17:24:08,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 1041 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=233, Invalid=1407, Unknown=0, NotChecked=0, Total=1640 [2021-11-23 17:24:08,868 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 261 mSDsluCounter, 2185 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 2339 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:24:08,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 2339 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 114 Invalid, 0 Unknown, 165 Unchecked, 0.1s Time] [2021-11-23 17:24:08,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3182 states. [2021-11-23 17:24:09,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3182 to 3180. [2021-11-23 17:24:09,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3180 states, 3179 states have (on average 1.3092167348222712) internal successors, (4162), 3179 states have internal predecessors, (4162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:24:09,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3180 states to 3180 states and 4162 transitions. [2021-11-23 17:24:09,198 INFO L78 Accepts]: Start accepts. Automaton has 3180 states and 4162 transitions. Word has length 179 [2021-11-23 17:24:09,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:24:09,198 INFO L470 AbstractCegarLoop]: Abstraction has 3180 states and 4162 transitions. [2021-11-23 17:24:09,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 18.09375) internal successors, (579), 31 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:24:09,199 INFO L276 IsEmpty]: Start isEmpty. Operand 3180 states and 4162 transitions. [2021-11-23 17:24:09,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-23 17:24:09,200 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:24:09,200 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:24:09,209 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (120)] Ended with exit code 0 [2021-11-23 17:24:09,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (121)] Forceful destruction successful, exit code 0 [2021-11-23 17:24:09,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2021-11-23 17:24:09,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:24:09,803 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:24:09,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:24:09,803 INFO L85 PathProgramCache]: Analyzing trace with hash -722310731, now seen corresponding path program 1 times [2021-11-23 17:24:09,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:24:09,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1078513834] [2021-11-23 17:24:09,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:24:09,804 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:24:09,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:24:09,805 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:24:09,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (123)] Waiting until timeout for monitored process [2021-11-23 17:24:10,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:24:10,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:24:10,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:24:12,438 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:24:12,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:24:13,114 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:24:13,115 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:24:13,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1078513834] [2021-11-23 17:24:13,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1078513834] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:24:13,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2024038659] [2021-11-23 17:24:13,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:24:13,115 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:24:13,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:24:13,116 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:24:13,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (124)] Waiting until timeout for monitored process [2021-11-23 17:24:13,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:24:13,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:24:13,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:24:15,348 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:24:15,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:24:15,803 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:24:15,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2024038659] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:24:15,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713784272] [2021-11-23 17:24:15,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:24:15,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:24:15,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:24:15,804 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:24:15,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-11-23 17:24:16,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:24:16,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:24:16,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:24:18,367 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:24:18,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:24:19,007 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:24:19,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713784272] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:24:19,007 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:24:19,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 17:24:19,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396158883] [2021-11-23 17:24:19,008 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:24:19,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 17:24:19,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:24:19,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 17:24:19,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:24:19,009 INFO L87 Difference]: Start difference. First operand 3180 states and 4162 transitions. Second operand has 16 states, 16 states have (on average 21.125) internal successors, (338), 15 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:24:19,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:24:19,674 INFO L93 Difference]: Finished difference Result 5604 states and 7507 transitions. [2021-11-23 17:24:19,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 17:24:19,675 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 21.125) internal successors, (338), 15 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 179 [2021-11-23 17:24:19,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:24:19,678 INFO L225 Difference]: With dead ends: 5604 [2021-11-23 17:24:19,678 INFO L226 Difference]: Without dead ends: 3202 [2021-11-23 17:24:19,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1071 GetRequests, 1054 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-11-23 17:24:19,680 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 290 mSDsluCounter, 1529 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 1730 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 298 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:24:19,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 1730 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 294 Invalid, 0 Unknown, 298 Unchecked, 0.2s Time] [2021-11-23 17:24:19,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3202 states. [2021-11-23 17:24:19,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3202 to 2850. [2021-11-23 17:24:19,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2850 states, 2849 states have (on average 1.3352053352053352) internal successors, (3804), 2849 states have internal predecessors, (3804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:24:19,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2850 states to 2850 states and 3804 transitions. [2021-11-23 17:24:19,972 INFO L78 Accepts]: Start accepts. Automaton has 2850 states and 3804 transitions. Word has length 179 [2021-11-23 17:24:19,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:24:19,973 INFO L470 AbstractCegarLoop]: Abstraction has 2850 states and 3804 transitions. [2021-11-23 17:24:19,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 21.125) internal successors, (338), 15 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:24:19,973 INFO L276 IsEmpty]: Start isEmpty. Operand 2850 states and 3804 transitions. [2021-11-23 17:24:19,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-23 17:24:19,974 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:24:19,974 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:24:19,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (123)] Forceful destruction successful, exit code 0 [2021-11-23 17:24:20,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2021-11-23 17:24:20,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (124)] Forceful destruction successful, exit code 0 [2021-11-23 17:24:20,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:24:20,575 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:24:20,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:24:20,575 INFO L85 PathProgramCache]: Analyzing trace with hash 2041696614, now seen corresponding path program 1 times [2021-11-23 17:24:20,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:24:20,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1861653849] [2021-11-23 17:24:20,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:24:20,576 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:24:20,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:24:20,577 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:24:20,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (126)] Waiting until timeout for monitored process [2021-11-23 17:24:20,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:24:20,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:24:20,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:24:23,995 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:24:23,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:24:25,160 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:24:25,160 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:24:25,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1861653849] [2021-11-23 17:24:25,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1861653849] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:24:25,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1274792130] [2021-11-23 17:24:25,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:24:25,161 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:24:25,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:24:25,162 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:24:25,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (127)] Waiting until timeout for monitored process [2021-11-23 17:24:25,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:24:25,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:24:25,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:24:28,085 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:24:28,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:24:28,889 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:24:28,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1274792130] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:24:28,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327859808] [2021-11-23 17:24:28,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:24:28,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:24:28,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:24:28,891 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:24:28,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-11-23 17:24:29,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:24:29,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:24:29,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:24:32,346 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:24:32,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:24:33,385 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:24:33,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327859808] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:24:33,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:24:33,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 21 [2021-11-23 17:24:33,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068508938] [2021-11-23 17:24:33,386 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:24:33,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-23 17:24:33,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:24:33,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-23 17:24:33,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-11-23 17:24:33,387 INFO L87 Difference]: Start difference. First operand 2850 states and 3804 transitions. Second operand has 22 states, 22 states have (on average 15.136363636363637) internal successors, (333), 21 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:24:36,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:24:36,054 INFO L93 Difference]: Finished difference Result 18728 states and 25809 transitions. [2021-11-23 17:24:36,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-23 17:24:36,057 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 15.136363636363637) internal successors, (333), 21 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 179 [2021-11-23 17:24:36,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:24:36,075 INFO L225 Difference]: With dead ends: 18728 [2021-11-23 17:24:36,075 INFO L226 Difference]: Without dead ends: 16318 [2021-11-23 17:24:36,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1100 GetRequests, 1051 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=340, Invalid=2210, Unknown=0, NotChecked=0, Total=2550 [2021-11-23 17:24:36,081 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 1800 mSDsluCounter, 2673 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1800 SdHoareTripleChecker+Valid, 2972 SdHoareTripleChecker+Invalid, 1691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1073 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:24:36,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1800 Valid, 2972 Invalid, 1691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 589 Invalid, 0 Unknown, 1073 Unchecked, 0.5s Time] [2021-11-23 17:24:36,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16318 states. [2021-11-23 17:24:37,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16318 to 9958. [2021-11-23 17:24:37,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9958 states, 9957 states have (on average 1.3597469117203977) internal successors, (13539), 9957 states have internal predecessors, (13539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:24:37,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9958 states to 9958 states and 13539 transitions. [2021-11-23 17:24:37,123 INFO L78 Accepts]: Start accepts. Automaton has 9958 states and 13539 transitions. Word has length 179 [2021-11-23 17:24:37,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:24:37,123 INFO L470 AbstractCegarLoop]: Abstraction has 9958 states and 13539 transitions. [2021-11-23 17:24:37,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 15.136363636363637) internal successors, (333), 21 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:24:37,123 INFO L276 IsEmpty]: Start isEmpty. Operand 9958 states and 13539 transitions. [2021-11-23 17:24:37,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-23 17:24:37,125 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:24:37,125 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:24:37,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (127)] Forceful destruction successful, exit code 0 [2021-11-23 17:24:37,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2021-11-23 17:24:37,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (126)] Ended with exit code 0 [2021-11-23 17:24:37,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:24:37,726 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:24:37,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:24:37,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1197385284, now seen corresponding path program 1 times [2021-11-23 17:24:37,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:24:37,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [409635667] [2021-11-23 17:24:37,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:24:37,727 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:24:37,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:24:37,728 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:24:37,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (129)] Waiting until timeout for monitored process [2021-11-23 17:24:38,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:24:38,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:24:38,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:24:40,012 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:24:40,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:24:40,656 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:24:40,657 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:24:40,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [409635667] [2021-11-23 17:24:40,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [409635667] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:24:40,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1931204858] [2021-11-23 17:24:40,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:24:40,657 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:24:40,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:24:40,658 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:24:40,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (130)] Waiting until timeout for monitored process [2021-11-23 17:24:41,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:24:41,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:24:41,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:24:43,307 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:24:43,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:24:43,954 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:24:43,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1931204858] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:24:43,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147722232] [2021-11-23 17:24:43,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:24:43,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:24:43,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:24:43,955 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:24:43,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-11-23 17:24:44,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:24:44,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:24:44,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:24:46,874 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:24:46,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:24:47,640 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:24:47,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147722232] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:24:47,641 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:24:47,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 17:24:47,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808098716] [2021-11-23 17:24:47,641 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:24:47,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 17:24:47,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:24:47,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 17:24:47,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:24:47,642 INFO L87 Difference]: Start difference. First operand 9958 states and 13539 transitions. Second operand has 16 states, 16 states have (on average 21.5) internal successors, (344), 15 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:24:52,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:24:52,605 INFO L93 Difference]: Finished difference Result 42013 states and 56992 transitions. [2021-11-23 17:24:52,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-23 17:24:52,606 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 21.5) internal successors, (344), 15 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-11-23 17:24:52,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:24:52,647 INFO L225 Difference]: With dead ends: 42013 [2021-11-23 17:24:52,647 INFO L226 Difference]: Without dead ends: 32347 [2021-11-23 17:24:52,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1100 GetRequests, 1065 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=222, Invalid=1110, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 17:24:52,658 INFO L933 BasicCegarLoop]: 509 mSDtfsCounter, 1023 mSDsluCounter, 3982 mSDsCounter, 0 mSdLazyCounter, 1228 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1023 SdHoareTripleChecker+Valid, 4491 SdHoareTripleChecker+Invalid, 2836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1595 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:24:52,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1023 Valid, 4491 Invalid, 2836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1228 Invalid, 0 Unknown, 1595 Unchecked, 0.9s Time] [2021-11-23 17:24:52,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32347 states. [2021-11-23 17:24:55,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32347 to 19509. [2021-11-23 17:24:55,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19509 states, 19508 states have (on average 1.3598523682591757) internal successors, (26528), 19508 states have internal predecessors, (26528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:24:55,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19509 states to 19509 states and 26528 transitions. [2021-11-23 17:24:55,070 INFO L78 Accepts]: Start accepts. Automaton has 19509 states and 26528 transitions. Word has length 180 [2021-11-23 17:24:55,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:24:55,070 INFO L470 AbstractCegarLoop]: Abstraction has 19509 states and 26528 transitions. [2021-11-23 17:24:55,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 21.5) internal successors, (344), 15 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:24:55,070 INFO L276 IsEmpty]: Start isEmpty. Operand 19509 states and 26528 transitions. [2021-11-23 17:24:55,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-23 17:24:55,072 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:24:55,072 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:24:55,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (129)] Forceful destruction successful, exit code 0 [2021-11-23 17:24:55,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (130)] Forceful destruction successful, exit code 0 [2021-11-23 17:24:55,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2021-11-23 17:24:55,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:24:55,675 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:24:55,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:24:55,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1638316200, now seen corresponding path program 1 times [2021-11-23 17:24:55,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:24:55,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1529504589] [2021-11-23 17:24:55,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:24:55,676 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:24:55,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:24:55,677 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:24:55,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (132)] Waiting until timeout for monitored process [2021-11-23 17:24:56,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:24:56,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:24:56,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:24:56,273 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:24:56,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:24:56,273 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:24:56,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1529504589] [2021-11-23 17:24:56,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1529504589] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:24:56,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:24:56,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:24:56,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013047330] [2021-11-23 17:24:56,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:24:56,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:24:56,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:24:56,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:24:56,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:24:56,275 INFO L87 Difference]: Start difference. First operand 19509 states and 26528 transitions. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:24:57,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:24:57,577 INFO L93 Difference]: Finished difference Result 29273 states and 39794 transitions. [2021-11-23 17:24:57,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:24:57,578 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-11-23 17:24:57,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:24:57,590 INFO L225 Difference]: With dead ends: 29273 [2021-11-23 17:24:57,590 INFO L226 Difference]: Without dead ends: 9943 [2021-11-23 17:24:57,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 178 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 17:24:57,600 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 86 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:24:57,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 396 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:24:57,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9943 states. [2021-11-23 17:24:58,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9943 to 9941. [2021-11-23 17:24:58,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9941 states, 9940 states have (on average 1.3392354124748491) internal successors, (13312), 9940 states have internal predecessors, (13312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:24:58,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9941 states to 9941 states and 13312 transitions. [2021-11-23 17:24:58,693 INFO L78 Accepts]: Start accepts. Automaton has 9941 states and 13312 transitions. Word has length 180 [2021-11-23 17:24:58,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:24:58,694 INFO L470 AbstractCegarLoop]: Abstraction has 9941 states and 13312 transitions. [2021-11-23 17:24:58,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:24:58,694 INFO L276 IsEmpty]: Start isEmpty. Operand 9941 states and 13312 transitions. [2021-11-23 17:24:58,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-23 17:24:58,695 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:24:58,695 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:24:58,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (132)] Forceful destruction successful, exit code 0 [2021-11-23 17:24:58,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:24:58,896 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:24:58,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:24:58,896 INFO L85 PathProgramCache]: Analyzing trace with hash 601980477, now seen corresponding path program 1 times [2021-11-23 17:24:58,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:24:58,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1583016114] [2021-11-23 17:24:58,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:24:58,897 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:24:58,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:24:58,898 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:24:58,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (133)] Waiting until timeout for monitored process [2021-11-23 17:24:59,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:24:59,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:24:59,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:02,404 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:02,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:03,149 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:03,149 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:03,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1583016114] [2021-11-23 17:25:03,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1583016114] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:03,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [462874202] [2021-11-23 17:25:03,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:03,150 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:25:03,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:25:03,151 INFO L229 MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:25:03,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (134)] Waiting until timeout for monitored process [2021-11-23 17:25:03,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:03,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:25:03,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:07,089 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:07,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:07,814 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:07,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [462874202] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:07,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639522002] [2021-11-23 17:25:07,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:07,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:25:07,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:25:07,816 INFO L229 MonitoredProcess]: Starting monitored process 135 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:25:07,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-11-23 17:25:08,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:08,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:25:08,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:11,184 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:11,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:12,420 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:12,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639522002] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:12,421 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:25:12,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 8, 8] total 31 [2021-11-23 17:25:12,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273870024] [2021-11-23 17:25:12,421 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:25:12,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-23 17:25:12,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:12,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-23 17:25:12,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2021-11-23 17:25:12,422 INFO L87 Difference]: Start difference. First operand 9941 states and 13312 transitions. Second operand has 32 states, 32 states have (on average 18.46875) internal successors, (591), 31 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:13,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:13,971 INFO L93 Difference]: Finished difference Result 19864 states and 26638 transitions. [2021-11-23 17:25:13,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 17:25:13,972 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 18.46875) internal successors, (591), 31 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-11-23 17:25:13,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:13,983 INFO L225 Difference]: With dead ends: 19864 [2021-11-23 17:25:13,983 INFO L226 Difference]: Without dead ends: 10102 [2021-11-23 17:25:13,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1086 GetRequests, 1047 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=234, Invalid=1406, Unknown=0, NotChecked=0, Total=1640 [2021-11-23 17:25:13,990 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 177 mSDsluCounter, 2696 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 2850 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:13,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 2850 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 171 Invalid, 0 Unknown, 269 Unchecked, 0.1s Time] [2021-11-23 17:25:13,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10102 states. [2021-11-23 17:25:15,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10102 to 10096. [2021-11-23 17:25:15,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10096 states, 10095 states have (on average 1.3371966319960376) internal successors, (13499), 10095 states have internal predecessors, (13499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:15,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10096 states to 10096 states and 13499 transitions. [2021-11-23 17:25:15,045 INFO L78 Accepts]: Start accepts. Automaton has 10096 states and 13499 transitions. Word has length 180 [2021-11-23 17:25:15,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:15,045 INFO L470 AbstractCegarLoop]: Abstraction has 10096 states and 13499 transitions. [2021-11-23 17:25:15,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 18.46875) internal successors, (591), 31 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:15,046 INFO L276 IsEmpty]: Start isEmpty. Operand 10096 states and 13499 transitions. [2021-11-23 17:25:15,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-23 17:25:15,047 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:15,047 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:25:15,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:15,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (134)] Ended with exit code 0 [2021-11-23 17:25:15,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (133)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:15,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,134 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,133 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:15,648 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:25:15,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:15,649 INFO L85 PathProgramCache]: Analyzing trace with hash -2122165041, now seen corresponding path program 1 times [2021-11-23 17:25:15,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:15,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2055185446] [2021-11-23 17:25:15,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:15,649 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:15,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:15,650 INFO L229 MonitoredProcess]: Starting monitored process 136 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:15,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (136)] Waiting until timeout for monitored process [2021-11-23 17:25:15,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:15,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:25:15,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:18,878 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:18,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:19,585 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:19,586 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:19,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2055185446] [2021-11-23 17:25:19,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2055185446] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:19,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2112585184] [2021-11-23 17:25:19,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:19,586 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:25:19,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:25:19,587 INFO L229 MonitoredProcess]: Starting monitored process 137 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:25:19,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (137)] Waiting until timeout for monitored process [2021-11-23 17:25:20,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:20,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:25:20,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:23,174 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:23,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:23,949 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:23,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2112585184] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:23,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885317733] [2021-11-23 17:25:23,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:23,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:25:23,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:25:23,950 INFO L229 MonitoredProcess]: Starting monitored process 138 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:25:23,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2021-11-23 17:25:24,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:24,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:25:24,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:27,217 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:27,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:28,443 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:28,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885317733] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:28,443 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:25:28,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 8, 8] total 31 [2021-11-23 17:25:28,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467251498] [2021-11-23 17:25:28,444 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:25:28,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-23 17:25:28,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:28,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-23 17:25:28,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2021-11-23 17:25:28,445 INFO L87 Difference]: Start difference. First operand 10096 states and 13499 transitions. Second operand has 32 states, 32 states have (on average 18.84375) internal successors, (603), 31 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:30,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:30,102 INFO L93 Difference]: Finished difference Result 20204 states and 27064 transitions. [2021-11-23 17:25:30,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 17:25:30,103 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 18.84375) internal successors, (603), 31 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2021-11-23 17:25:30,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:30,113 INFO L225 Difference]: With dead ends: 20204 [2021-11-23 17:25:30,114 INFO L226 Difference]: Without dead ends: 10442 [2021-11-23 17:25:30,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1092 GetRequests, 1053 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=234, Invalid=1406, Unknown=0, NotChecked=0, Total=1640 [2021-11-23 17:25:30,120 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 243 mSDsluCounter, 2161 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 2313 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:30,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 2313 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 89 Invalid, 0 Unknown, 187 Unchecked, 0.1s Time] [2021-11-23 17:25:30,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10442 states. [2021-11-23 17:25:31,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10442 to 10430. [2021-11-23 17:25:31,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10430 states, 10429 states have (on average 1.3346437817623933) internal successors, (13919), 10429 states have internal predecessors, (13919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:31,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10430 states to 10430 states and 13919 transitions. [2021-11-23 17:25:31,258 INFO L78 Accepts]: Start accepts. Automaton has 10430 states and 13919 transitions. Word has length 181 [2021-11-23 17:25:31,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:31,258 INFO L470 AbstractCegarLoop]: Abstraction has 10430 states and 13919 transitions. [2021-11-23 17:25:31,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 18.84375) internal successors, (603), 31 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:31,258 INFO L276 IsEmpty]: Start isEmpty. Operand 10430 states and 13919 transitions. [2021-11-23 17:25:31,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-23 17:25:31,260 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:31,260 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:25:31,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (137)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:31,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2021-11-23 17:25:31,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (136)] Ended with exit code 0 [2021-11-23 17:25:31,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,138 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,136 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:31,861 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:25:31,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:31,861 INFO L85 PathProgramCache]: Analyzing trace with hash 471444714, now seen corresponding path program 1 times [2021-11-23 17:25:31,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:31,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2103175490] [2021-11-23 17:25:31,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:31,862 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:31,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:31,863 INFO L229 MonitoredProcess]: Starting monitored process 139 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:31,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (139)] Waiting until timeout for monitored process [2021-11-23 17:25:32,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:32,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:25:32,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:32,451 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:32,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:32,451 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:32,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2103175490] [2021-11-23 17:25:32,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2103175490] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:32,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:32,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:25:32,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758880497] [2021-11-23 17:25:32,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:32,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:25:32,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:32,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:25:32,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:32,453 INFO L87 Difference]: Start difference. First operand 10430 states and 13919 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:33,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:33,194 INFO L93 Difference]: Finished difference Result 15314 states and 20481 transitions. [2021-11-23 17:25:33,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:25:33,194 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2021-11-23 17:25:33,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:33,200 INFO L225 Difference]: With dead ends: 15314 [2021-11-23 17:25:33,200 INFO L226 Difference]: Without dead ends: 5552 [2021-11-23 17:25:33,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 179 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 17:25:33,206 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 84 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:33,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 375 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:25:33,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5552 states. [2021-11-23 17:25:33,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5552 to 5550. [2021-11-23 17:25:33,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5550 states, 5549 states have (on average 1.314290863218598) internal successors, (7293), 5549 states have internal predecessors, (7293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:33,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5550 states to 5550 states and 7293 transitions. [2021-11-23 17:25:33,894 INFO L78 Accepts]: Start accepts. Automaton has 5550 states and 7293 transitions. Word has length 181 [2021-11-23 17:25:33,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:33,894 INFO L470 AbstractCegarLoop]: Abstraction has 5550 states and 7293 transitions. [2021-11-23 17:25:33,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:33,895 INFO L276 IsEmpty]: Start isEmpty. Operand 5550 states and 7293 transitions. [2021-11-23 17:25:33,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-23 17:25:33,897 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:33,897 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:25:33,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (139)] Ended with exit code 0 [2021-11-23 17:25:34,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:34,111 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:25:34,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:34,111 INFO L85 PathProgramCache]: Analyzing trace with hash 124955386, now seen corresponding path program 1 times [2021-11-23 17:25:34,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:34,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [851375621] [2021-11-23 17:25:34,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:34,112 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:34,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:34,114 INFO L229 MonitoredProcess]: Starting monitored process 140 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:34,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (140)] Waiting until timeout for monitored process [2021-11-23 17:25:34,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:34,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:25:34,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:36,529 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:36,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:37,401 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:37,402 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:37,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [851375621] [2021-11-23 17:25:37,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [851375621] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:37,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1635614486] [2021-11-23 17:25:37,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:37,402 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:25:37,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:25:37,403 INFO L229 MonitoredProcess]: Starting monitored process 141 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:25:37,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (141)] Waiting until timeout for monitored process [2021-11-23 17:25:37,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:37,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:25:37,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:40,453 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:40,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:41,050 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:41,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1635614486] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:41,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487624981] [2021-11-23 17:25:41,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:41,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:25:41,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:25:41,052 INFO L229 MonitoredProcess]: Starting monitored process 142 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:25:41,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2021-11-23 17:25:41,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:41,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:25:41,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:43,375 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:43,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:44,157 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:44,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487624981] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:44,157 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:25:44,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 17:25:44,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616352901] [2021-11-23 17:25:44,158 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:25:44,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 17:25:44,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:44,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 17:25:44,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:25:44,159 INFO L87 Difference]: Start difference. First operand 5550 states and 7293 transitions. Second operand has 16 states, 16 states have (on average 21.875) internal successors, (350), 15 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:47,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:47,109 INFO L93 Difference]: Finished difference Result 19646 states and 25782 transitions. [2021-11-23 17:25:47,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-23 17:25:47,109 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 21.875) internal successors, (350), 15 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2021-11-23 17:25:47,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:47,127 INFO L225 Difference]: With dead ends: 19646 [2021-11-23 17:25:47,127 INFO L226 Difference]: Without dead ends: 14764 [2021-11-23 17:25:47,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1103 GetRequests, 1068 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=231, Invalid=1101, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 17:25:47,133 INFO L933 BasicCegarLoop]: 277 mSDtfsCounter, 838 mSDsluCounter, 1822 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 838 SdHoareTripleChecker+Valid, 2099 SdHoareTripleChecker+Invalid, 1366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 765 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:47,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [838 Valid, 2099 Invalid, 1366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 585 Invalid, 0 Unknown, 765 Unchecked, 0.5s Time] [2021-11-23 17:25:47,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14764 states. [2021-11-23 17:25:48,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14764 to 10282. [2021-11-23 17:25:48,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10282 states, 10281 states have (on average 1.3152417080050578) internal successors, (13522), 10281 states have internal predecessors, (13522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:48,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10282 states to 10282 states and 13522 transitions. [2021-11-23 17:25:48,450 INFO L78 Accepts]: Start accepts. Automaton has 10282 states and 13522 transitions. Word has length 181 [2021-11-23 17:25:48,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:48,451 INFO L470 AbstractCegarLoop]: Abstraction has 10282 states and 13522 transitions. [2021-11-23 17:25:48,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 21.875) internal successors, (350), 15 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:48,451 INFO L276 IsEmpty]: Start isEmpty. Operand 10282 states and 13522 transitions. [2021-11-23 17:25:48,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-23 17:25:48,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:48,453 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:25:48,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (140)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:48,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:48,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (141)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:49,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,142 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,141 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:25:49,054 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:25:49,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:49,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1646907850, now seen corresponding path program 1 times [2021-11-23 17:25:49,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:49,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1194616890] [2021-11-23 17:25:49,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:49,055 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:49,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:49,056 INFO L229 MonitoredProcess]: Starting monitored process 143 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:49,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (143)] Waiting until timeout for monitored process [2021-11-23 17:25:49,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:49,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:25:49,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:49,677 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:49,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:49,677 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:49,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1194616890] [2021-11-23 17:25:49,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1194616890] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:49,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:49,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:25:49,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416160585] [2021-11-23 17:25:49,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:49,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:25:49,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:49,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:25:49,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:49,679 INFO L87 Difference]: Start difference. First operand 10282 states and 13522 transitions. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:50,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:50,539 INFO L93 Difference]: Finished difference Result 15214 states and 20036 transitions. [2021-11-23 17:25:50,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:25:50,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2021-11-23 17:25:50,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:50,546 INFO L225 Difference]: With dead ends: 15214 [2021-11-23 17:25:50,546 INFO L226 Difference]: Without dead ends: 5356 [2021-11-23 17:25:50,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 180 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 17:25:50,553 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 82 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:50,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 356 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:25:50,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5356 states. [2021-11-23 17:25:51,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5356 to 5354. [2021-11-23 17:25:51,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5354 states, 5353 states have (on average 1.2983373809079022) internal successors, (6950), 5353 states have internal predecessors, (6950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:51,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5354 states to 5354 states and 6950 transitions. [2021-11-23 17:25:51,262 INFO L78 Accepts]: Start accepts. Automaton has 5354 states and 6950 transitions. Word has length 182 [2021-11-23 17:25:51,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:51,262 INFO L470 AbstractCegarLoop]: Abstraction has 5354 states and 6950 transitions. [2021-11-23 17:25:51,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:51,262 INFO L276 IsEmpty]: Start isEmpty. Operand 5354 states and 6950 transitions. [2021-11-23 17:25:51,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-23 17:25:51,264 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:51,264 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:25:51,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (143)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:51,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:51,465 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:25:51,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:51,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1657462518, now seen corresponding path program 1 times [2021-11-23 17:25:51,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:51,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1191989659] [2021-11-23 17:25:51,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:51,466 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:51,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:51,467 INFO L229 MonitoredProcess]: Starting monitored process 144 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:51,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (144)] Waiting until timeout for monitored process [2021-11-23 17:25:51,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:51,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:25:51,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:54,719 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:25:54,719 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:54,719 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:54,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1191989659] [2021-11-23 17:25:54,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1191989659] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:54,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:54,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:25:54,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729620910] [2021-11-23 17:25:54,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:54,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:25:54,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:54,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:25:54,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:25:54,720 INFO L87 Difference]: Start difference. First operand 5354 states and 6950 transitions. Second operand has 8 states, 8 states have (on average 22.625) internal successors, (181), 8 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:56,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:56,682 INFO L93 Difference]: Finished difference Result 17170 states and 22505 transitions. [2021-11-23 17:25:56,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:25:56,682 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.625) internal successors, (181), 8 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2021-11-23 17:25:56,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:56,701 INFO L225 Difference]: With dead ends: 17170 [2021-11-23 17:25:56,701 INFO L226 Difference]: Without dead ends: 15504 [2021-11-23 17:25:56,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:25:56,706 INFO L933 BasicCegarLoop]: 355 mSDtfsCounter, 871 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 871 SdHoareTripleChecker+Valid, 1143 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:56,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [871 Valid, 1143 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 17:25:56,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15504 states. [2021-11-23 17:25:57,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15504 to 8712. [2021-11-23 17:25:57,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8712 states, 8711 states have (on average 1.2877970382275283) internal successors, (11218), 8711 states have internal predecessors, (11218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:57,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8712 states to 8712 states and 11218 transitions. [2021-11-23 17:25:57,892 INFO L78 Accepts]: Start accepts. Automaton has 8712 states and 11218 transitions. Word has length 182 [2021-11-23 17:25:57,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:57,892 INFO L470 AbstractCegarLoop]: Abstraction has 8712 states and 11218 transitions. [2021-11-23 17:25:57,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.625) internal successors, (181), 8 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:57,892 INFO L276 IsEmpty]: Start isEmpty. Operand 8712 states and 11218 transitions. [2021-11-23 17:25:57,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-23 17:25:57,893 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:57,893 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:25:57,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (144)] Ended with exit code 0 [2021-11-23 17:25:58,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:58,094 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:25:58,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:58,094 INFO L85 PathProgramCache]: Analyzing trace with hash -2112714678, now seen corresponding path program 1 times [2021-11-23 17:25:58,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:58,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [811244183] [2021-11-23 17:25:58,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:58,095 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:58,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:58,096 INFO L229 MonitoredProcess]: Starting monitored process 145 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:58,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (145)] Waiting until timeout for monitored process [2021-11-23 17:25:58,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:58,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:25:58,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:00,908 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 17:26:00,908 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:26:00,908 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:00,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [811244183] [2021-11-23 17:26:00,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [811244183] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:26:00,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:26:00,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:26:00,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680226599] [2021-11-23 17:26:00,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:26:00,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:26:00,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:00,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:26:00,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:26:00,909 INFO L87 Difference]: Start difference. First operand 8712 states and 11218 transitions. Second operand has 8 states, 8 states have (on average 22.125) internal successors, (177), 8 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:03,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:03,225 INFO L93 Difference]: Finished difference Result 18612 states and 24385 transitions. [2021-11-23 17:26:03,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:26:03,225 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.125) internal successors, (177), 8 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2021-11-23 17:26:03,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:03,245 INFO L225 Difference]: With dead ends: 18612 [2021-11-23 17:26:03,245 INFO L226 Difference]: Without dead ends: 16946 [2021-11-23 17:26:03,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:26:03,250 INFO L933 BasicCegarLoop]: 339 mSDtfsCounter, 851 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 1253 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:03,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [851 Valid, 1253 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 17:26:03,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16946 states. [2021-11-23 17:26:04,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16946 to 10360. [2021-11-23 17:26:04,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10360 states, 10359 states have (on average 1.285259194902983) internal successors, (13314), 10359 states have internal predecessors, (13314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:04,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10360 states to 10360 states and 13314 transitions. [2021-11-23 17:26:04,696 INFO L78 Accepts]: Start accepts. Automaton has 10360 states and 13314 transitions. Word has length 182 [2021-11-23 17:26:04,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:04,696 INFO L470 AbstractCegarLoop]: Abstraction has 10360 states and 13314 transitions. [2021-11-23 17:26:04,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.125) internal successors, (177), 8 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:04,697 INFO L276 IsEmpty]: Start isEmpty. Operand 10360 states and 13314 transitions. [2021-11-23 17:26:04,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-23 17:26:04,698 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:04,698 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:26:04,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (145)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:04,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:26:04,899 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:26:04,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:04,899 INFO L85 PathProgramCache]: Analyzing trace with hash -580864851, now seen corresponding path program 1 times [2021-11-23 17:26:04,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:04,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1463302395] [2021-11-23 17:26:04,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:04,900 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:04,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:04,901 INFO L229 MonitoredProcess]: Starting monitored process 146 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:04,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (146)] Waiting until timeout for monitored process [2021-11-23 17:26:05,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:05,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:26:05,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:08,112 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 17:26:08,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:26:08,112 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:08,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1463302395] [2021-11-23 17:26:08,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1463302395] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:26:08,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:26:08,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:26:08,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226874303] [2021-11-23 17:26:08,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:26:08,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:26:08,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:08,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:26:08,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:26:08,114 INFO L87 Difference]: Start difference. First operand 10360 states and 13314 transitions. Second operand has 8 states, 8 states have (on average 22.0) internal successors, (176), 8 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:10,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:10,609 INFO L93 Difference]: Finished difference Result 20244 states and 26465 transitions. [2021-11-23 17:26:10,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:26:10,609 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.0) internal successors, (176), 8 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2021-11-23 17:26:10,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:10,629 INFO L225 Difference]: With dead ends: 20244 [2021-11-23 17:26:10,630 INFO L226 Difference]: Without dead ends: 15314 [2021-11-23 17:26:10,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:26:10,637 INFO L933 BasicCegarLoop]: 357 mSDtfsCounter, 1372 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1372 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:10,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1372 Valid, 1077 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 17:26:10,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15314 states. [2021-11-23 17:26:12,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15314 to 8728. [2021-11-23 17:26:12,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8728 states, 8727 states have (on average 1.2762690500744815) internal successors, (11138), 8727 states have internal predecessors, (11138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:12,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8728 states to 8728 states and 11138 transitions. [2021-11-23 17:26:12,068 INFO L78 Accepts]: Start accepts. Automaton has 8728 states and 11138 transitions. Word has length 182 [2021-11-23 17:26:12,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:12,068 INFO L470 AbstractCegarLoop]: Abstraction has 8728 states and 11138 transitions. [2021-11-23 17:26:12,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.0) internal successors, (176), 8 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:12,069 INFO L276 IsEmpty]: Start isEmpty. Operand 8728 states and 11138 transitions. [2021-11-23 17:26:12,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-23 17:26:12,070 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:12,070 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:26:12,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (146)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:12,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:26:12,271 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:26:12,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:12,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1246236749, now seen corresponding path program 1 times [2021-11-23 17:26:12,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:12,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [14677307] [2021-11-23 17:26:12,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:12,272 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:12,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:12,273 INFO L229 MonitoredProcess]: Starting monitored process 147 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:12,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (147)] Waiting until timeout for monitored process [2021-11-23 17:26:12,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:12,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:26:12,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:15,599 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 17:26:15,600 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:26:15,600 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:15,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [14677307] [2021-11-23 17:26:15,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [14677307] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:26:15,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:26:15,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:26:15,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373344881] [2021-11-23 17:26:15,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:26:15,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:26:15,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:15,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:26:15,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:26:15,601 INFO L87 Difference]: Start difference. First operand 8728 states and 11138 transitions. Second operand has 8 states, 8 states have (on average 22.25) internal successors, (178), 8 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:18,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:18,355 INFO L93 Difference]: Finished difference Result 18620 states and 24297 transitions. [2021-11-23 17:26:18,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:26:18,356 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.25) internal successors, (178), 8 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2021-11-23 17:26:18,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:18,377 INFO L225 Difference]: With dead ends: 18620 [2021-11-23 17:26:18,377 INFO L226 Difference]: Without dead ends: 16954 [2021-11-23 17:26:18,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:26:18,382 INFO L933 BasicCegarLoop]: 366 mSDtfsCounter, 1135 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1135 SdHoareTripleChecker+Valid, 1336 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:18,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1135 Valid, 1336 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 17:26:18,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16954 states. [2021-11-23 17:26:20,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16954 to 10380. [2021-11-23 17:26:20,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10380 states, 10379 states have (on average 1.2758454571731381) internal successors, (13242), 10379 states have internal predecessors, (13242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:20,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10380 states to 10380 states and 13242 transitions. [2021-11-23 17:26:20,079 INFO L78 Accepts]: Start accepts. Automaton has 10380 states and 13242 transitions. Word has length 182 [2021-11-23 17:26:20,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:20,080 INFO L470 AbstractCegarLoop]: Abstraction has 10380 states and 13242 transitions. [2021-11-23 17:26:20,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.25) internal successors, (178), 8 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:20,080 INFO L276 IsEmpty]: Start isEmpty. Operand 10380 states and 13242 transitions. [2021-11-23 17:26:20,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-23 17:26:20,082 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:20,082 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:26:20,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (147)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:20,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:26:20,282 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:26:20,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:20,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1854119766, now seen corresponding path program 1 times [2021-11-23 17:26:20,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:20,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1397031244] [2021-11-23 17:26:20,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:20,284 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:20,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:20,285 INFO L229 MonitoredProcess]: Starting monitored process 148 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:20,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (148)] Waiting until timeout for monitored process [2021-11-23 17:26:20,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:20,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:26:20,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:23,544 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 17:26:23,544 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:26:23,544 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:23,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1397031244] [2021-11-23 17:26:23,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1397031244] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:26:23,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:26:23,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:26:23,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968184356] [2021-11-23 17:26:23,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:26:23,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:26:23,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:23,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:26:23,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:26:23,546 INFO L87 Difference]: Start difference. First operand 10380 states and 13242 transitions. Second operand has 8 states, 8 states have (on average 22.375) internal successors, (179), 8 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:27,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:27,106 INFO L93 Difference]: Finished difference Result 20266 states and 26393 transitions. [2021-11-23 17:26:27,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:26:27,106 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 8 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2021-11-23 17:26:27,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:27,131 INFO L225 Difference]: With dead ends: 20266 [2021-11-23 17:26:27,131 INFO L226 Difference]: Without dead ends: 18600 [2021-11-23 17:26:27,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:26:27,135 INFO L933 BasicCegarLoop]: 366 mSDtfsCounter, 990 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 990 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:27,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [990 Valid, 1211 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 17:26:27,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18600 states. [2021-11-23 17:26:29,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18600 to 12038. [2021-11-23 17:26:29,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12038 states, 12037 states have (on average 1.2755670017446208) internal successors, (15354), 12037 states have internal predecessors, (15354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:29,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12038 states to 12038 states and 15354 transitions. [2021-11-23 17:26:29,228 INFO L78 Accepts]: Start accepts. Automaton has 12038 states and 15354 transitions. Word has length 182 [2021-11-23 17:26:29,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:29,228 INFO L470 AbstractCegarLoop]: Abstraction has 12038 states and 15354 transitions. [2021-11-23 17:26:29,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 8 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:29,229 INFO L276 IsEmpty]: Start isEmpty. Operand 12038 states and 15354 transitions. [2021-11-23 17:26:29,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-23 17:26:29,233 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:29,233 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:26:29,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (148)] Ended with exit code 0 [2021-11-23 17:26:29,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:26:29,447 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:26:29,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:29,447 INFO L85 PathProgramCache]: Analyzing trace with hash 21201901, now seen corresponding path program 1 times [2021-11-23 17:26:29,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:29,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [841272177] [2021-11-23 17:26:29,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:29,448 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:29,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:29,449 INFO L229 MonitoredProcess]: Starting monitored process 149 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:29,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (149)] Waiting until timeout for monitored process [2021-11-23 17:26:29,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:29,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:26:29,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:32,912 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 17:26:32,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:26:32,912 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:32,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [841272177] [2021-11-23 17:26:32,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [841272177] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:26:32,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:26:32,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:26:32,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214282538] [2021-11-23 17:26:32,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:26:32,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:26:32,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:32,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:26:32,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:26:32,914 INFO L87 Difference]: Start difference. First operand 12038 states and 15354 transitions. Second operand has 8 states, 8 states have (on average 22.5) internal successors, (180), 8 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:36,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:36,849 INFO L93 Difference]: Finished difference Result 21938 states and 28521 transitions. [2021-11-23 17:26:36,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:26:36,850 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.5) internal successors, (180), 8 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2021-11-23 17:26:36,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:36,876 INFO L225 Difference]: With dead ends: 21938 [2021-11-23 17:26:36,877 INFO L226 Difference]: Without dead ends: 20272 [2021-11-23 17:26:36,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:26:36,882 INFO L933 BasicCegarLoop]: 366 mSDtfsCounter, 780 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 1419 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:36,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [780 Valid, 1419 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 17:26:36,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20272 states. [2021-11-23 17:26:39,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20272 to 13710. [2021-11-23 17:26:39,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13710 states, 13709 states have (on average 1.2752206579619227) internal successors, (17482), 13709 states have internal predecessors, (17482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:39,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13710 states to 13710 states and 17482 transitions. [2021-11-23 17:26:39,474 INFO L78 Accepts]: Start accepts. Automaton has 13710 states and 17482 transitions. Word has length 182 [2021-11-23 17:26:39,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:39,475 INFO L470 AbstractCegarLoop]: Abstraction has 13710 states and 17482 transitions. [2021-11-23 17:26:39,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.5) internal successors, (180), 8 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:39,475 INFO L276 IsEmpty]: Start isEmpty. Operand 13710 states and 17482 transitions. [2021-11-23 17:26:39,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-23 17:26:39,477 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:39,477 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:26:39,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (149)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:39,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:26:39,678 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:26:39,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:39,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1391067479, now seen corresponding path program 1 times [2021-11-23 17:26:39,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:39,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [692388293] [2021-11-23 17:26:39,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:39,679 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:39,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:39,680 INFO L229 MonitoredProcess]: Starting monitored process 150 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:39,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (150)] Waiting until timeout for monitored process [2021-11-23 17:26:40,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:40,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-23 17:26:40,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:47,083 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:47,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:50,825 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:50,825 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:50,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [692388293] [2021-11-23 17:26:50,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [692388293] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:50,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1676154534] [2021-11-23 17:26:50,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:50,826 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:26:50,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:26:50,828 INFO L229 MonitoredProcess]: Starting monitored process 151 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:26:50,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (151)] Waiting until timeout for monitored process [2021-11-23 17:26:51,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:51,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 17:26:51,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:02,018 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:02,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:04,333 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:04,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1676154534] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:04,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110297581] [2021-11-23 17:27:04,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:04,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:27:04,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:27:04,335 INFO L229 MonitoredProcess]: Starting monitored process 152 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:27:04,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2021-11-23 17:27:04,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:04,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 17:27:04,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:11,636 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:11,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:14,069 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:14,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110297581] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:14,069 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:27:14,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 17, 13, 14, 13] total 101 [2021-11-23 17:27:14,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022742891] [2021-11-23 17:27:14,070 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:27:14,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-11-23 17:27:14,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:27:14,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-11-23 17:27:14,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=572, Invalid=9528, Unknown=0, NotChecked=0, Total=10100 [2021-11-23 17:27:14,073 INFO L87 Difference]: Start difference. First operand 13710 states and 17482 transitions. Second operand has 101 states, 101 states have (on average 9.099009900990099) internal successors, (919), 101 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:27:26,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:27:26,413 INFO L93 Difference]: Finished difference Result 27256 states and 34792 transitions. [2021-11-23 17:27:26,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-23 17:27:26,414 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 9.099009900990099) internal successors, (919), 101 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 183 [2021-11-23 17:27:26,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:27:26,433 INFO L225 Difference]: With dead ends: 27256 [2021-11-23 17:27:26,433 INFO L226 Difference]: Without dead ends: 13787 [2021-11-23 17:27:26,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1147 GetRequests, 1013 SyntacticMatches, 2 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5696 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=1245, Invalid=16577, Unknown=0, NotChecked=0, Total=17822 [2021-11-23 17:27:26,446 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 617 mSDsluCounter, 7903 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 8062 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 459 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:27:26,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [617 Valid, 8062 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 382 Invalid, 0 Unknown, 459 Unchecked, 0.4s Time] [2021-11-23 17:27:26,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13787 states. [2021-11-23 17:27:29,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13787 to 13787. [2021-11-23 17:27:29,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13787 states, 13786 states have (on average 1.2740461337588858) internal successors, (17564), 13786 states have internal predecessors, (17564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:27:29,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13787 states to 13787 states and 17564 transitions. [2021-11-23 17:27:29,156 INFO L78 Accepts]: Start accepts. Automaton has 13787 states and 17564 transitions. Word has length 183 [2021-11-23 17:27:29,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:27:29,156 INFO L470 AbstractCegarLoop]: Abstraction has 13787 states and 17564 transitions. [2021-11-23 17:27:29,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 9.099009900990099) internal successors, (919), 101 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:27:29,156 INFO L276 IsEmpty]: Start isEmpty. Operand 13787 states and 17564 transitions. [2021-11-23 17:27:29,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-23 17:27:29,159 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:27:29,159 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:27:29,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:29,366 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (151)] Ended with exit code 0 [2021-11-23 17:27:29,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (150)] Ended with exit code 0 [2021-11-23 17:27:29,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,151 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,150 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:27:29,761 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:27:29,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:27:29,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1695002234, now seen corresponding path program 1 times [2021-11-23 17:27:29,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:27:29,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1077304735] [2021-11-23 17:27:29,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:29,763 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:27:29,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:27:29,764 INFO L229 MonitoredProcess]: Starting monitored process 153 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:27:29,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (153)] Waiting until timeout for monitored process [2021-11-23 17:27:30,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:30,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-23 17:27:30,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:40,431 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:40,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:48,132 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:48,133 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:27:48,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1077304735] [2021-11-23 17:27:48,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1077304735] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:48,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1066718172] [2021-11-23 17:27:48,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:48,133 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:27:48,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:27:48,134 INFO L229 MonitoredProcess]: Starting monitored process 154 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:27:48,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (154)] Waiting until timeout for monitored process [2021-11-23 17:27:48,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:48,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-23 17:27:48,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:28:07,862 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 17:28:07,862 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:28:07,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1066718172] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:28:07,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:28:07,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [30, 29] total 85 [2021-11-23 17:28:07,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182443055] [2021-11-23 17:28:07,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:28:07,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-23 17:28:07,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:28:07,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-23 17:28:07,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=486, Invalid=6654, Unknown=0, NotChecked=0, Total=7140 [2021-11-23 17:28:07,865 INFO L87 Difference]: Start difference. First operand 13787 states and 17564 transitions. Second operand has 32 states, 32 states have (on average 5.40625) internal successors, (173), 32 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:28:10,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:28:10,960 INFO L93 Difference]: Finished difference Result 27133 states and 34637 transitions. [2021-11-23 17:28:10,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-23 17:28:10,961 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.40625) internal successors, (173), 32 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 183 [2021-11-23 17:28:10,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:28:10,980 INFO L225 Difference]: With dead ends: 27133 [2021-11-23 17:28:10,980 INFO L226 Difference]: Without dead ends: 13735 [2021-11-23 17:28:10,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 462 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2364 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=513, Invalid=6797, Unknown=0, NotChecked=0, Total=7310 [2021-11-23 17:28:10,994 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 120 mSDsluCounter, 1448 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 1617 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 850 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:28:10,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 1617 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 107 Invalid, 0 Unknown, 850 Unchecked, 0.2s Time] [2021-11-23 17:28:11,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13735 states. [2021-11-23 17:28:13,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13735 to 13735. [2021-11-23 17:28:13,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13735 states, 13734 states have (on average 1.2750109217999126) internal successors, (17511), 13734 states have internal predecessors, (17511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:28:13,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13735 states to 13735 states and 17511 transitions. [2021-11-23 17:28:13,812 INFO L78 Accepts]: Start accepts. Automaton has 13735 states and 17511 transitions. Word has length 183 [2021-11-23 17:28:13,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:28:13,813 INFO L470 AbstractCegarLoop]: Abstraction has 13735 states and 17511 transitions. [2021-11-23 17:28:13,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.40625) internal successors, (173), 32 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:28:13,813 INFO L276 IsEmpty]: Start isEmpty. Operand 13735 states and 17511 transitions. [2021-11-23 17:28:13,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-23 17:28:13,816 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:28:13,816 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:28:13,827 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (153)] Ended with exit code 0 [2021-11-23 17:28:14,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (154)] Forceful destruction successful, exit code 0 [2021-11-23 17:28:14,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,154 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:28:14,217 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:28:14,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:28:14,218 INFO L85 PathProgramCache]: Analyzing trace with hash -925675933, now seen corresponding path program 1 times [2021-11-23 17:28:14,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:28:14,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2122057846] [2021-11-23 17:28:14,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:28:14,219 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:28:14,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:28:14,220 INFO L229 MonitoredProcess]: Starting monitored process 155 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:28:14,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (155)] Waiting until timeout for monitored process [2021-11-23 17:28:14,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:28:14,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:28:14,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:28:16,780 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:28:16,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:28:17,733 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:28:17,733 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:28:17,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2122057846] [2021-11-23 17:28:17,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2122057846] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:28:17,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [302744172] [2021-11-23 17:28:17,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:28:17,734 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:28:17,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:28:17,735 INFO L229 MonitoredProcess]: Starting monitored process 156 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:28:17,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (156)] Waiting until timeout for monitored process [2021-11-23 17:28:18,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:28:18,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:28:18,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:28:20,926 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:28:20,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:28:21,881 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:28:21,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [302744172] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:28:21,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739533050] [2021-11-23 17:28:21,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:28:21,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:28:21,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:28:21,882 INFO L229 MonitoredProcess]: Starting monitored process 157 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:28:21,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2021-11-23 17:28:22,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:28:22,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:28:22,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:28:25,324 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:28:25,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:28:26,522 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:28:26,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739533050] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:28:26,522 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:28:26,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 17:28:26,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377370511] [2021-11-23 17:28:26,523 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:28:26,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 17:28:26,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:28:26,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 17:28:26,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:28:26,524 INFO L87 Difference]: Start difference. First operand 13735 states and 17511 transitions. Second operand has 16 states, 16 states have (on average 22.375) internal successors, (358), 15 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:28:29,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:28:29,451 INFO L93 Difference]: Finished difference Result 27175 states and 34732 transitions. [2021-11-23 17:28:29,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 17:28:29,451 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 22.375) internal successors, (358), 15 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 183 [2021-11-23 17:28:29,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:28:29,471 INFO L225 Difference]: With dead ends: 27175 [2021-11-23 17:28:29,471 INFO L226 Difference]: Without dead ends: 14053 [2021-11-23 17:28:29,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1095 GetRequests, 1078 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-11-23 17:28:29,488 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 466 mSDsluCounter, 1769 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 1973 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 349 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:28:29,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [466 Valid, 1973 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 197 Invalid, 0 Unknown, 349 Unchecked, 0.2s Time] [2021-11-23 17:28:29,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14053 states. [2021-11-23 17:28:32,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14053 to 13648. [2021-11-23 17:28:32,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13648 states, 13647 states have (on average 1.276251190737891) internal successors, (17417), 13647 states have internal predecessors, (17417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:28:32,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13648 states to 13648 states and 17417 transitions. [2021-11-23 17:28:32,156 INFO L78 Accepts]: Start accepts. Automaton has 13648 states and 17417 transitions. Word has length 183 [2021-11-23 17:28:32,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:28:32,157 INFO L470 AbstractCegarLoop]: Abstraction has 13648 states and 17417 transitions. [2021-11-23 17:28:32,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 22.375) internal successors, (358), 15 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:28:32,157 INFO L276 IsEmpty]: Start isEmpty. Operand 13648 states and 17417 transitions. [2021-11-23 17:28:32,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-23 17:28:32,160 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:28:32,160 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:28:32,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (155)] Ended with exit code 0 [2021-11-23 17:28:32,401 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2021-11-23 17:28:32,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (156)] Forceful destruction successful, exit code 0 [2021-11-23 17:28:32,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,157 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,156 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:28:32,775 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 19 more)] === [2021-11-23 17:28:32,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:28:32,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1234119981, now seen corresponding path program 1 times [2021-11-23 17:28:32,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:28:32,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [991718183] [2021-11-23 17:28:32,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:28:32,776 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:28:32,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:28:32,777 INFO L229 MonitoredProcess]: Starting monitored process 158 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:28:32,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (158)] Waiting until timeout for monitored process [2021-11-23 17:28:33,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:28:33,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-23 17:28:33,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:28:41,022 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:28:41,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:28:45,120 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:28:45,120 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:28:45,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [991718183] [2021-11-23 17:28:45,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [991718183] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:28:45,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1696787096] [2021-11-23 17:28:45,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:28:45,121 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:28:45,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:28:45,122 INFO L229 MonitoredProcess]: Starting monitored process 159 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:28:45,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (159)] Waiting until timeout for monitored process [2021-11-23 17:28:45,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:28:45,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-23 17:28:45,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:29:06,776 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:29:06,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:29:16,224 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:29:16,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1696787096] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:29:16,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39543221] [2021-11-23 17:29:16,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:29:16,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:29:16,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:29:16,225 INFO L229 MonitoredProcess]: Starting monitored process 160 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:29:16,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd5880b-cbfc-4481-995b-4ebe983c9de5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2021-11-23 17:29:16,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:29:16,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 17:29:16,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:29:25,363 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:29:25,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:29:28,386 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:29:28,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39543221] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:29:28,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:29:28,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 32, 27, 13, 11] total 128 [2021-11-23 17:29:28,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461397967] [2021-11-23 17:29:28,387 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:29:28,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2021-11-23 17:29:28,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:29:28,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-11-23 17:29:28,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1320, Invalid=14936, Unknown=0, NotChecked=0, Total=16256 [2021-11-23 17:29:28,390 INFO L87 Difference]: Start difference. First operand 13648 states and 17417 transitions. Second operand has 128 states, 128 states have (on average 7.15625) internal successors, (916), 128 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)