./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-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_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/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_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/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_f60db270-9072-4fdb-a34c-5ac7127b6050/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 c082dc45380b26d7d2efa14a2b9a25a882bb361e7db7c29c901ddfabd3b29352 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:46:22,561 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:46:22,564 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:46:22,604 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:46:22,605 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:46:22,607 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:46:22,609 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:46:22,612 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:46:22,616 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:46:22,617 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:46:22,619 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:46:22,622 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:46:22,622 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:46:22,624 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:46:22,627 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:46:22,629 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:46:22,630 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:46:22,632 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:46:22,635 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:46:22,638 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:46:22,641 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:46:22,643 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:46:22,645 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:46:22,647 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:46:22,652 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:46:22,653 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:46:22,653 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:46:22,655 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:46:22,656 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:46:22,657 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:46:22,658 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:46:22,659 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:46:22,661 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:46:22,662 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:46:22,664 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:46:22,664 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:46:22,665 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:46:22,666 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:46:22,666 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:46:22,668 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:46:22,669 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:46:22,671 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 16:46:22,702 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:46:22,703 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:46:22,703 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:46:22,704 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:46:22,705 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:46:22,706 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:46:22,706 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:46:22,707 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:46:22,707 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:46:22,708 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 16:46:22,708 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:46:22,709 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:46:22,709 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 16:46:22,710 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 16:46:22,710 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:46:22,711 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 16:46:22,711 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 16:46:22,711 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 16:46:22,713 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:46:22,713 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:46:22,713 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 16:46:22,713 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:46:22,714 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:46:22,714 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:46:22,714 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:46:22,715 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:46:22,715 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:46:22,715 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:46:22,716 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:46:22,716 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:46:22,716 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:46:22,716 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:46:22,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:46:22,717 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:46:22,717 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:46:22,718 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:46:22,718 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 16:46:22,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 16:46:22,721 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:46:22,721 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:46:22,721 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:46:22,722 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_f60db270-9072-4fdb-a34c-5ac7127b6050/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c082dc45380b26d7d2efa14a2b9a25a882bb361e7db7c29c901ddfabd3b29352 [2021-11-23 16:46:23,036 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:46:23,075 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:46:23,078 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:46:23,080 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:46:23,082 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:46:23,083 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2021-11-23 16:46:23,165 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/data/718a72b62/72683be3af7d49f2b6680ad0c0010de7/FLAGce22f737a [2021-11-23 16:46:24,059 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:46:24,061 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2021-11-23 16:46:24,105 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/data/718a72b62/72683be3af7d49f2b6680ad0c0010de7/FLAGce22f737a [2021-11-23 16:46:24,615 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/data/718a72b62/72683be3af7d49f2b6680ad0c0010de7 [2021-11-23 16:46:24,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:46:24,624 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:46:24,630 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:46:24,631 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:46:24,635 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:46:24,637 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:46:24" (1/1) ... [2021-11-23 16:46:24,639 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b8008da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:24, skipping insertion in model container [2021-11-23 16:46:24,640 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:46:24" (1/1) ... [2021-11-23 16:46:24,647 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:46:24,818 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:46:25,527 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[33110,33123] [2021-11-23 16:46:25,619 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[47435,47448] [2021-11-23 16:46:25,662 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[54586,54599] [2021-11-23 16:46:25,692 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[58145,58158] [2021-11-23 16:46:25,713 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[61485,61498] [2021-11-23 16:46:25,800 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[76732,76745] [2021-11-23 16:46:25,853 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[83878,83891] [2021-11-23 16:46:25,871 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[87432,87445] [2021-11-23 16:46:25,888 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[90767,90780] [2021-11-23 16:46:25,908 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[94900,94913] [2021-11-23 16:46:25,924 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[98301,98314] [2021-11-23 16:46:25,942 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[101855,101868] [2021-11-23 16:46:25,967 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[105190,105203] [2021-11-23 16:46:25,989 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[108944,108957] [2021-11-23 16:46:26,009 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[112294,112307] [2021-11-23 16:46:26,029 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[115829,115842] [2021-11-23 16:46:26,138 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:46:26,156 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:46:26,428 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[33110,33123] [2021-11-23 16:46:26,478 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[47435,47448] [2021-11-23 16:46:26,503 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[54586,54599] [2021-11-23 16:46:26,517 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[58145,58158] [2021-11-23 16:46:26,530 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[61485,61498] [2021-11-23 16:46:26,586 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[76732,76745] [2021-11-23 16:46:26,610 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[83878,83891] [2021-11-23 16:46:26,624 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[87432,87445] [2021-11-23 16:46:26,636 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[90767,90780] [2021-11-23 16:46:26,651 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[94900,94913] [2021-11-23 16:46:26,665 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[98301,98314] [2021-11-23 16:46:26,678 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[101855,101868] [2021-11-23 16:46:26,690 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[105190,105203] [2021-11-23 16:46:26,704 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[108944,108957] [2021-11-23 16:46:26,716 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[112294,112307] [2021-11-23 16:46:26,727 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[115829,115842] [2021-11-23 16:46:26,754 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:46:26,783 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:46:26,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:26 WrapperNode [2021-11-23 16:46:26,784 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:46:26,785 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:46:26,785 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:46:26,785 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:46:26,795 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:26" (1/1) ... [2021-11-23 16:46:26,859 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:26" (1/1) ... [2021-11-23 16:46:26,993 INFO L137 Inliner]: procedures = 25, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 5403 [2021-11-23 16:46:26,994 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:46:26,995 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:46:26,995 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:46:26,995 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:46:27,006 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:26" (1/1) ... [2021-11-23 16:46:27,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:26" (1/1) ... [2021-11-23 16:46:27,020 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:26" (1/1) ... [2021-11-23 16:46:27,021 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:26" (1/1) ... [2021-11-23 16:46:27,080 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:26" (1/1) ... [2021-11-23 16:46:27,125 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:26" (1/1) ... [2021-11-23 16:46:27,143 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:26" (1/1) ... [2021-11-23 16:46:27,171 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:46:27,172 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:46:27,173 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:46:27,173 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:46:27,174 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:26" (1/1) ... [2021-11-23 16:46:27,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:46:27,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:46:27,218 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:46:27,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:46:27,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:46:27,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 16:46:27,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:46:27,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:46:27,620 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:46:27,622 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:46:31,147 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:46:31,245 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 16:46:31,251 INFO L158 Benchmark]: Toolchain (without parser) took 6625.90ms. Allocated memory was 96.5MB in the beginning and 169.9MB in the end (delta: 73.4MB). Free memory was 58.8MB in the beginning and 69.4MB in the end (delta: -10.6MB). Peak memory consumption was 77.5MB. Max. memory is 16.1GB. [2021-11-23 16:46:31,253 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 96.5MB. Free memory was 51.5MB in the beginning and 51.5MB in the end (delta: 44.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:46:31,256 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2153.97ms. Allocated memory was 96.5MB in the beginning and 130.0MB in the end (delta: 33.6MB). Free memory was 58.6MB in the beginning and 62.6MB in the end (delta: -4.0MB). Peak memory consumption was 31.9MB. Max. memory is 16.1GB. [2021-11-23 16:46:31,258 INFO L158 Benchmark]: Boogie Procedure Inliner took 209.13ms. Allocated memory is still 130.0MB. Free memory was 62.0MB in the beginning and 87.1MB in the end (delta: -25.2MB). Peak memory consumption was 3.4MB. Max. memory is 16.1GB. [2021-11-23 16:46:31,259 INFO L158 Benchmark]: Boogie Preprocessor took 176.10ms. Allocated memory is still 130.0MB. Free memory was 87.1MB in the beginning and 75.1MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 16:46:31,262 INFO L158 Benchmark]: RCFGBuilder took 4076.43ms. Allocated memory was 130.0MB in the beginning and 169.9MB in the end (delta: 39.8MB). Free memory was 75.1MB in the beginning and 69.4MB in the end (delta: 5.8MB). Peak memory consumption was 59.1MB. Max. memory is 16.1GB. [2021-11-23 16:46:31,273 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 96.5MB. Free memory was 51.5MB in the beginning and 51.5MB in the end (delta: 44.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2153.97ms. Allocated memory was 96.5MB in the beginning and 130.0MB in the end (delta: 33.6MB). Free memory was 58.6MB in the beginning and 62.6MB in the end (delta: -4.0MB). Peak memory consumption was 31.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 209.13ms. Allocated memory is still 130.0MB. Free memory was 62.0MB in the beginning and 87.1MB in the end (delta: -25.2MB). Peak memory consumption was 3.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 176.10ms. Allocated memory is still 130.0MB. Free memory was 87.1MB in the beginning and 75.1MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * RCFGBuilder took 4076.43ms. Allocated memory was 130.0MB in the beginning and 169.9MB in the end (delta: 39.8MB). Free memory was 75.1MB in the beginning and 69.4MB in the end (delta: 5.8MB). Peak memory consumption was 59.1MB. 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 16:46:31,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/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_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/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_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/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_f60db270-9072-4fdb-a34c-5ac7127b6050/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 c082dc45380b26d7d2efa14a2b9a25a882bb361e7db7c29c901ddfabd3b29352 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:46:34,358 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:46:34,362 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:46:34,433 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:46:34,434 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:46:34,440 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:46:34,442 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:46:34,448 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:46:34,453 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:46:34,463 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:46:34,465 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:46:34,467 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:46:34,468 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:46:34,471 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:46:34,474 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:46:34,479 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:46:34,482 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:46:34,483 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:46:34,486 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:46:34,496 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:46:34,498 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:46:34,500 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:46:34,503 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:46:34,507 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:46:34,518 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:46:34,519 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:46:34,519 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:46:34,522 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:46:34,523 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:46:34,524 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:46:34,525 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:46:34,526 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:46:34,529 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:46:34,530 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:46:34,531 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:46:34,532 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:46:34,533 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:46:34,533 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:46:34,534 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:46:34,536 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:46:34,537 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:46:34,538 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 16:46:34,587 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:46:34,587 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:46:34,588 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:46:34,588 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:46:34,589 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:46:34,589 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:46:34,589 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:46:34,590 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:46:34,590 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:46:34,590 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:46:34,591 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:46:34,591 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:46:34,592 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:46:34,592 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:46:34,593 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:46:34,593 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:46:34,593 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:46:34,594 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:46:34,594 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:46:34,594 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 16:46:34,594 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 16:46:34,595 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 16:46:34,595 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:46:34,595 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:46:34,596 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:46:34,596 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:46:34,596 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:46:34,596 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 16:46:34,597 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:46:34,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:46:34,597 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:46:34,598 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:46:34,598 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:46:34,598 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 16:46:34,599 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 16:46:34,599 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:46:34,599 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:46:34,599 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:46:34,600 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_f60db270-9072-4fdb-a34c-5ac7127b6050/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c082dc45380b26d7d2efa14a2b9a25a882bb361e7db7c29c901ddfabd3b29352 [2021-11-23 16:46:35,154 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:46:35,185 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:46:35,189 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:46:35,190 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:46:35,192 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:46:35,194 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2021-11-23 16:46:35,284 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/data/299a970f5/1a9ec9274f3e4aee930c9f0d9b323374/FLAG4bf781eac [2021-11-23 16:46:36,246 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:46:36,247 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2021-11-23 16:46:36,291 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/data/299a970f5/1a9ec9274f3e4aee930c9f0d9b323374/FLAG4bf781eac [2021-11-23 16:46:36,719 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/data/299a970f5/1a9ec9274f3e4aee930c9f0d9b323374 [2021-11-23 16:46:36,722 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:46:36,725 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:46:36,729 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:46:36,730 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:46:36,734 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:46:36,736 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:46:36" (1/1) ... [2021-11-23 16:46:36,738 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9ed26d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:36, skipping insertion in model container [2021-11-23 16:46:36,738 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:46:36" (1/1) ... [2021-11-23 16:46:36,748 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:46:36,966 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:46:37,759 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[33110,33123] [2021-11-23 16:46:37,879 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[47435,47448] [2021-11-23 16:46:37,931 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[54586,54599] [2021-11-23 16:46:37,954 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[58145,58158] [2021-11-23 16:46:38,006 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[61485,61498] [2021-11-23 16:46:38,194 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[76732,76745] [2021-11-23 16:46:38,254 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[83878,83891] [2021-11-23 16:46:38,286 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[87432,87445] [2021-11-23 16:46:38,321 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[90767,90780] [2021-11-23 16:46:38,355 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[94900,94913] [2021-11-23 16:46:38,383 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[98301,98314] [2021-11-23 16:46:38,405 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[101855,101868] [2021-11-23 16:46:38,424 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[105190,105203] [2021-11-23 16:46:38,449 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[108944,108957] [2021-11-23 16:46:38,481 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[112294,112307] [2021-11-23 16:46:38,519 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[115829,115842] [2021-11-23 16:46:38,609 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:46:38,626 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:46:38,842 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[33110,33123] [2021-11-23 16:46:38,912 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[47435,47448] [2021-11-23 16:46:38,946 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[54586,54599] [2021-11-23 16:46:38,977 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[58145,58158] [2021-11-23 16:46:38,994 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[61485,61498] [2021-11-23 16:46:39,063 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[76732,76745] [2021-11-23 16:46:39,096 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[83878,83891] [2021-11-23 16:46:39,113 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[87432,87445] [2021-11-23 16:46:39,130 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[90767,90780] [2021-11-23 16:46:39,150 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[94900,94913] [2021-11-23 16:46:39,167 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[98301,98314] [2021-11-23 16:46:39,184 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[101855,101868] [2021-11-23 16:46:39,200 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[105190,105203] [2021-11-23 16:46:39,219 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[108944,108957] [2021-11-23 16:46:39,236 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[112294,112307] [2021-11-23 16:46:39,254 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_f60db270-9072-4fdb-a34c-5ac7127b6050/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[115829,115842] [2021-11-23 16:46:39,304 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:46:39,343 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:46:39,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:39 WrapperNode [2021-11-23 16:46:39,344 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:46:39,345 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:46:39,345 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:46:39,345 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:46:39,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:39" (1/1) ... [2021-11-23 16:46:39,442 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:39" (1/1) ... [2021-11-23 16:46:39,585 INFO L137 Inliner]: procedures = 25, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 5388 [2021-11-23 16:46:39,585 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:46:39,586 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:46:39,586 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:46:39,587 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:46:39,597 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:39" (1/1) ... [2021-11-23 16:46:39,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:39" (1/1) ... [2021-11-23 16:46:39,611 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:39" (1/1) ... [2021-11-23 16:46:39,611 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:39" (1/1) ... [2021-11-23 16:46:39,724 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:39" (1/1) ... [2021-11-23 16:46:39,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:39" (1/1) ... [2021-11-23 16:46:39,797 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:39" (1/1) ... [2021-11-23 16:46:39,830 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:46:39,832 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:46:39,833 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:46:39,833 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:46:39,834 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:39" (1/1) ... [2021-11-23 16:46:39,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:46:39,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:46:39,876 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:46:39,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:46:39,936 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:46:39,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 16:46:39,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:46:39,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:46:40,345 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:46:40,347 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:46:45,330 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:46:45,370 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 16:46:45,371 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 16:46:45,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:46:45 BoogieIcfgContainer [2021-11-23 16:46:45,376 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 16:46:45,381 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 16:46:45,381 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 16:46:45,385 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 16:46:45,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:46:36" (1/3) ... [2021-11-23 16:46:45,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@526b492b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:46:45, skipping insertion in model container [2021-11-23 16:46:45,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:39" (2/3) ... [2021-11-23 16:46:45,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@526b492b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:46:45, skipping insertion in model container [2021-11-23 16:46:45,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:46:45" (3/3) ... [2021-11-23 16:46:45,389 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2021-11-23 16:46:45,400 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 16:46:45,401 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2021-11-23 16:46:45,488 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 16:46:45,498 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 16:46:45,499 INFO L340 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2021-11-23 16:46:45,560 INFO L276 IsEmpty]: Start isEmpty. Operand has 1111 states, 1094 states have (on average 1.8272394881170018) internal successors, (1999), 1110 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:45,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-23 16:46:45,610 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:45,611 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] [2021-11-23 16:46:45,612 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:46:45,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:45,619 INFO L85 PathProgramCache]: Analyzing trace with hash -659325864, now seen corresponding path program 1 times [2021-11-23 16:46:45,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:45,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [431405759] [2021-11-23 16:46:45,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:45,642 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:45,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:45,647 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:45,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 16:46:46,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:46,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:46:46,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:47,123 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 16:46:47,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:46:47,125 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:47,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [431405759] [2021-11-23 16:46:47,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [431405759] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:46:47,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:46:47,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:46:47,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29718050] [2021-11-23 16:46:47,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:46:47,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:46:47,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:47,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:46:47,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:46:47,187 INFO L87 Difference]: Start difference. First operand has 1111 states, 1094 states have (on average 1.8272394881170018) internal successors, (1999), 1110 states have internal predecessors, (1999), 0 states have call successors, (0), 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 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:48,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:48,524 INFO L93 Difference]: Finished difference Result 1455 states and 2556 transitions. [2021-11-23 16:46:48,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:46:48,528 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-11-23 16:46:48,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:48,574 INFO L225 Difference]: With dead ends: 1455 [2021-11-23 16:46:48,580 INFO L226 Difference]: Without dead ends: 871 [2021-11-23 16:46:48,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:46:48,600 INFO L933 BasicCegarLoop]: 1522 mSDtfsCounter, 135 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 2363 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:48,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 2363 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 649 Invalid, 0 Unknown, 13 Unchecked, 1.1s Time] [2021-11-23 16:46:48,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-11-23 16:46:48,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 871. [2021-11-23 16:46:48,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 855 states have (on average 1.32046783625731) internal successors, (1129), 870 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:48,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 1129 transitions. [2021-11-23 16:46:48,788 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 1129 transitions. Word has length 72 [2021-11-23 16:46:48,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:48,789 INFO L470 AbstractCegarLoop]: Abstraction has 871 states and 1129 transitions. [2021-11-23 16:46:48,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:48,789 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 1129 transitions. [2021-11-23 16:46:48,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-23 16:46:48,795 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:48,795 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] [2021-11-23 16:46:48,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:49,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:46:49,015 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:46:49,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:49,016 INFO L85 PathProgramCache]: Analyzing trace with hash -954340830, now seen corresponding path program 1 times [2021-11-23 16:46:49,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:49,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1544530638] [2021-11-23 16:46:49,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:49,018 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:49,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:49,019 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:49,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 16:46:49,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:49,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:46:49,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:50,017 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 16:46:50,017 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:46:50,018 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:50,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1544530638] [2021-11-23 16:46:50,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1544530638] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:46:50,019 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:46:50,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:46:50,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550514903] [2021-11-23 16:46:50,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:46:50,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:46:50,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:50,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:46:50,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:46:50,025 INFO L87 Difference]: Start difference. First operand 871 states and 1129 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:51,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:51,182 INFO L93 Difference]: Finished difference Result 1136 states and 1471 transitions. [2021-11-23 16:46:51,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:46:51,183 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-11-23 16:46:51,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:51,199 INFO L225 Difference]: With dead ends: 1136 [2021-11-23 16:46:51,199 INFO L226 Difference]: Without dead ends: 690 [2021-11-23 16:46:51,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:46:51,210 INFO L933 BasicCegarLoop]: 898 mSDtfsCounter, 27 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 1738 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:51,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 1738 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 912 Invalid, 0 Unknown, 10 Unchecked, 1.1s Time] [2021-11-23 16:46:51,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-11-23 16:46:51,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 690. [2021-11-23 16:46:51,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 674 states have (on average 1.3412462908011868) internal successors, (904), 689 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:51,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 904 transitions. [2021-11-23 16:46:51,301 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 904 transitions. Word has length 72 [2021-11-23 16:46:51,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:51,302 INFO L470 AbstractCegarLoop]: Abstraction has 690 states and 904 transitions. [2021-11-23 16:46:51,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:51,303 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 904 transitions. [2021-11-23 16:46:51,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-23 16:46:51,310 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:51,317 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] [2021-11-23 16:46:51,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:51,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:46:51,540 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:46:51,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:51,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1394193291, now seen corresponding path program 1 times [2021-11-23 16:46:51,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:51,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [141363821] [2021-11-23 16:46:51,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:51,542 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:51,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:51,543 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:51,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 16:46:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:51,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:46:51,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:52,299 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 16:46:52,300 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:46:52,300 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:52,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [141363821] [2021-11-23 16:46:52,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [141363821] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:46:52,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:46:52,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:46:52,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306418458] [2021-11-23 16:46:52,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:46:52,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:46:52,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:52,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:46:52,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:46:52,304 INFO L87 Difference]: Start difference. First operand 690 states and 904 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:52,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:52,818 INFO L93 Difference]: Finished difference Result 891 states and 1158 transitions. [2021-11-23 16:46:52,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:46:52,819 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-11-23 16:46:52,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:52,824 INFO L225 Difference]: With dead ends: 891 [2021-11-23 16:46:52,825 INFO L226 Difference]: Without dead ends: 537 [2021-11-23 16:46:52,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 68 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 16:46:52,828 INFO L933 BasicCegarLoop]: 697 mSDtfsCounter, 35 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:52,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 1069 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 321 Invalid, 0 Unknown, 12 Unchecked, 0.5s Time] [2021-11-23 16:46:52,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-11-23 16:46:52,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 537. [2021-11-23 16:46:52,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 521 states have (on average 1.3531669865642995) internal successors, (705), 536 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:52,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 705 transitions. [2021-11-23 16:46:52,853 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 705 transitions. Word has length 72 [2021-11-23 16:46:52,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:52,854 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 705 transitions. [2021-11-23 16:46:52,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:52,855 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 705 transitions. [2021-11-23 16:46:52,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-23 16:46:52,859 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:52,859 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] [2021-11-23 16:46:52,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-23 16:46:53,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:46:53,074 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:46:53,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:53,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1712008057, now seen corresponding path program 1 times [2021-11-23 16:46:53,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:53,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [947955436] [2021-11-23 16:46:53,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:53,077 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:53,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:53,078 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:53,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 16:46:53,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:53,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:46:53,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:53,919 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 16:46:53,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:46:53,919 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:53,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [947955436] [2021-11-23 16:46:53,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [947955436] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:46:53,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:46:53,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:46:53,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795120389] [2021-11-23 16:46:53,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:46:53,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:46:53,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:53,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:46:53,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:46:53,923 INFO L87 Difference]: Start difference. First operand 537 states and 705 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:54,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:54,282 INFO L93 Difference]: Finished difference Result 674 states and 871 transitions. [2021-11-23 16:46:54,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:46:54,286 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2021-11-23 16:46:54,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:54,290 INFO L225 Difference]: With dead ends: 674 [2021-11-23 16:46:54,290 INFO L226 Difference]: Without dead ends: 398 [2021-11-23 16:46:54,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 69 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 16:46:54,293 INFO L933 BasicCegarLoop]: 509 mSDtfsCounter, 29 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:54,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 817 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 204 Invalid, 0 Unknown, 14 Unchecked, 0.3s Time] [2021-11-23 16:46:54,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-11-23 16:46:54,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 398. [2021-11-23 16:46:54,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 382 states have (on average 1.3586387434554974) internal successors, (519), 397 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:54,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 519 transitions. [2021-11-23 16:46:54,310 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 519 transitions. Word has length 73 [2021-11-23 16:46:54,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:54,311 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 519 transitions. [2021-11-23 16:46:54,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:54,312 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 519 transitions. [2021-11-23 16:46:54,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-23 16:46:54,314 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:54,314 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] [2021-11-23 16:46:54,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:54,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:46:54,528 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:46:54,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:54,529 INFO L85 PathProgramCache]: Analyzing trace with hash -2105692957, now seen corresponding path program 1 times [2021-11-23 16:46:54,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:54,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [779824565] [2021-11-23 16:46:54,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:54,530 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:54,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:54,532 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:54,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 16:46:54,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:54,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:46:54,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:55,349 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 16:46:55,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:46:55,350 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:55,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [779824565] [2021-11-23 16:46:55,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [779824565] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:46:55,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:46:55,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:46:55,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476125975] [2021-11-23 16:46:55,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:46:55,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:46:55,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:55,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:46:55,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:46:55,354 INFO L87 Difference]: Start difference. First operand 398 states and 519 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:55,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:55,932 INFO L93 Difference]: Finished difference Result 610 states and 805 transitions. [2021-11-23 16:46:55,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:46:55,933 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2021-11-23 16:46:55,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:55,941 INFO L225 Difference]: With dead ends: 610 [2021-11-23 16:46:55,941 INFO L226 Difference]: Without dead ends: 390 [2021-11-23 16:46:55,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 70 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 16:46:55,945 INFO L933 BasicCegarLoop]: 498 mSDtfsCounter, 18 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:55,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 1020 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 448 Invalid, 0 Unknown, 16 Unchecked, 0.5s Time] [2021-11-23 16:46:55,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-23 16:46:55,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2021-11-23 16:46:55,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 374 states have (on average 1.3636363636363635) internal successors, (510), 389 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:55,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 510 transitions. [2021-11-23 16:46:55,963 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 510 transitions. Word has length 74 [2021-11-23 16:46:55,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:55,964 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 510 transitions. [2021-11-23 16:46:55,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:55,965 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 510 transitions. [2021-11-23 16:46:55,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-23 16:46:55,966 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:55,967 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] [2021-11-23 16:46:55,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:56,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:46:56,182 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:46:56,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:56,183 INFO L85 PathProgramCache]: Analyzing trace with hash 892076084, now seen corresponding path program 1 times [2021-11-23 16:46:56,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:56,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2014107122] [2021-11-23 16:46:56,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:56,185 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:56,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:56,186 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:56,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 16:46:56,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:56,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 16:46:56,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:57,207 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 16:46:57,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:46:57,208 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:57,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2014107122] [2021-11-23 16:46:57,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2014107122] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:46:57,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:46:57,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 16:46:57,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908835668] [2021-11-23 16:46:57,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:46:57,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 16:46:57,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:57,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 16:46:57,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:46:57,210 INFO L87 Difference]: Start difference. First operand 390 states and 510 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:57,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:57,575 INFO L93 Difference]: Finished difference Result 602 states and 796 transitions. [2021-11-23 16:46:57,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 16:46:57,575 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2021-11-23 16:46:57,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:57,579 INFO L225 Difference]: With dead ends: 602 [2021-11-23 16:46:57,579 INFO L226 Difference]: Without dead ends: 390 [2021-11-23 16:46:57,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 69 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 16:46:57,581 INFO L933 BasicCegarLoop]: 493 mSDtfsCounter, 28 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:57,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 882 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 193 Invalid, 0 Unknown, 25 Unchecked, 0.3s Time] [2021-11-23 16:46:57,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-23 16:46:57,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2021-11-23 16:46:57,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 374 states have (on average 1.36096256684492) internal successors, (509), 389 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:57,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 509 transitions. [2021-11-23 16:46:57,596 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 509 transitions. Word has length 75 [2021-11-23 16:46:57,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:57,597 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 509 transitions. [2021-11-23 16:46:57,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:57,597 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 509 transitions. [2021-11-23 16:46:57,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-23 16:46:57,599 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:57,599 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] [2021-11-23 16:46:57,618 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-23 16:46:57,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:46:57,814 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:46:57,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:57,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1107897332, now seen corresponding path program 1 times [2021-11-23 16:46:57,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:57,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [743223251] [2021-11-23 16:46:57,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:57,816 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:57,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:57,818 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:57,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 16:46:58,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:58,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:46:58,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:59,309 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 16:46:59,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:46:59,310 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:59,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [743223251] [2021-11-23 16:46:59,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [743223251] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:46:59,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:46:59,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:46:59,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709945776] [2021-11-23 16:46:59,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:46:59,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:46:59,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:59,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:46:59,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:46:59,315 INFO L87 Difference]: Start difference. First operand 390 states and 509 transitions. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:59,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:59,654 INFO L93 Difference]: Finished difference Result 480 states and 643 transitions. [2021-11-23 16:46:59,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:46:59,654 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2021-11-23 16:46:59,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:59,658 INFO L225 Difference]: With dead ends: 480 [2021-11-23 16:46:59,658 INFO L226 Difference]: Without dead ends: 391 [2021-11-23 16:46:59,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 68 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 16:46:59,660 INFO L933 BasicCegarLoop]: 484 mSDtfsCounter, 63 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 912 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:59,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 912 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 184 Invalid, 0 Unknown, 40 Unchecked, 0.3s Time] [2021-11-23 16:46:59,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-11-23 16:46:59,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 390. [2021-11-23 16:46:59,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 374 states have (on average 1.358288770053476) internal successors, (508), 389 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:59,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 508 transitions. [2021-11-23 16:46:59,675 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 508 transitions. Word has length 75 [2021-11-23 16:46:59,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:59,676 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 508 transitions. [2021-11-23 16:46:59,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:59,676 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 508 transitions. [2021-11-23 16:46:59,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-23 16:46:59,680 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:59,680 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] [2021-11-23 16:46:59,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:59,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:46:59,896 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:46:59,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:59,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1055548212, now seen corresponding path program 1 times [2021-11-23 16:46:59,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:59,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2024552514] [2021-11-23 16:46:59,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:59,898 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:59,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:59,899 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:59,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 16:47:00,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:00,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:47:00,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:01,401 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 16:47:01,401 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:47:01,401 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:01,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2024552514] [2021-11-23 16:47:01,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2024552514] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:01,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:01,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:47:01,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134991298] [2021-11-23 16:47:01,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:01,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:47:01,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:01,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:47:01,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:47:01,405 INFO L87 Difference]: Start difference. First operand 390 states and 508 transitions. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:01,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:01,747 INFO L93 Difference]: Finished difference Result 518 states and 692 transitions. [2021-11-23 16:47:01,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:47:01,748 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2021-11-23 16:47:01,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:01,752 INFO L225 Difference]: With dead ends: 518 [2021-11-23 16:47:01,752 INFO L226 Difference]: Without dead ends: 390 [2021-11-23 16:47:01,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 68 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 16:47:01,754 INFO L933 BasicCegarLoop]: 487 mSDtfsCounter, 64 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:01,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 895 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 187 Invalid, 0 Unknown, 35 Unchecked, 0.3s Time] [2021-11-23 16:47:01,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-23 16:47:01,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2021-11-23 16:47:01,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 374 states have (on average 1.3556149732620322) internal successors, (507), 389 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:01,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 507 transitions. [2021-11-23 16:47:01,769 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 507 transitions. Word has length 75 [2021-11-23 16:47:01,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:01,770 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 507 transitions. [2021-11-23 16:47:01,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:01,770 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 507 transitions. [2021-11-23 16:47:01,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 16:47:01,772 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:01,772 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] [2021-11-23 16:47:01,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:01,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:47:01,987 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:47:01,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:01,988 INFO L85 PathProgramCache]: Analyzing trace with hash -101200913, now seen corresponding path program 1 times [2021-11-23 16:47:01,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:01,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1050849200] [2021-11-23 16:47:01,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:01,989 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:01,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:01,991 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:02,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 16:47:02,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:02,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:47:02,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:03,514 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 16:47:03,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:47:03,514 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:03,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1050849200] [2021-11-23 16:47:03,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1050849200] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:03,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:03,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:47:03,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35620446] [2021-11-23 16:47:03,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:03,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:47:03,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:03,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:47:03,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:47:03,518 INFO L87 Difference]: Start difference. First operand 390 states and 507 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:03,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:03,828 INFO L93 Difference]: Finished difference Result 489 states and 648 transitions. [2021-11-23 16:47:03,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:47:03,829 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-11-23 16:47:03,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:03,832 INFO L225 Difference]: With dead ends: 489 [2021-11-23 16:47:03,833 INFO L226 Difference]: Without dead ends: 391 [2021-11-23 16:47:03,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 70 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 16:47:03,837 INFO L933 BasicCegarLoop]: 482 mSDtfsCounter, 62 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1161 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:03,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 1161 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 182 Invalid, 0 Unknown, 222 Unchecked, 0.3s Time] [2021-11-23 16:47:03,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-11-23 16:47:03,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 390. [2021-11-23 16:47:03,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 374 states have (on average 1.3529411764705883) internal successors, (506), 389 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:03,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 506 transitions. [2021-11-23 16:47:03,857 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 506 transitions. Word has length 77 [2021-11-23 16:47:03,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:03,858 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 506 transitions. [2021-11-23 16:47:03,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:03,858 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 506 transitions. [2021-11-23 16:47:03,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 16:47:03,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:03,860 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] [2021-11-23 16:47:03,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:04,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:47:04,075 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:47:04,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:04,076 INFO L85 PathProgramCache]: Analyzing trace with hash 798728465, now seen corresponding path program 1 times [2021-11-23 16:47:04,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:04,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1537269207] [2021-11-23 16:47:04,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:04,077 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:04,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:04,078 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:04,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 16:47:04,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:04,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:47:04,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:05,561 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 16:47:05,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:47:05,562 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:05,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1537269207] [2021-11-23 16:47:05,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1537269207] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:05,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:05,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:47:05,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148511785] [2021-11-23 16:47:05,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:05,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:47:05,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:05,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:47:05,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:47:05,565 INFO L87 Difference]: Start difference. First operand 390 states and 506 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:05,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:05,987 INFO L93 Difference]: Finished difference Result 475 states and 632 transitions. [2021-11-23 16:47:05,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:47:05,988 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-11-23 16:47:05,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:05,992 INFO L225 Difference]: With dead ends: 475 [2021-11-23 16:47:05,992 INFO L226 Difference]: Without dead ends: 399 [2021-11-23 16:47:05,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 70 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 16:47:05,993 INFO L933 BasicCegarLoop]: 481 mSDtfsCounter, 53 mSDsluCounter, 1437 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 1918 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 619 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:05,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 1918 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 365 Invalid, 0 Unknown, 619 Unchecked, 0.4s Time] [2021-11-23 16:47:05,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-11-23 16:47:06,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 390. [2021-11-23 16:47:06,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 374 states have (on average 1.3502673796791445) internal successors, (505), 389 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:06,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 505 transitions. [2021-11-23 16:47:06,009 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 505 transitions. Word has length 77 [2021-11-23 16:47:06,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:06,009 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 505 transitions. [2021-11-23 16:47:06,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:06,010 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 505 transitions. [2021-11-23 16:47:06,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 16:47:06,012 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:06,012 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] [2021-11-23 16:47:06,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:06,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:47:06,231 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:47:06,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:06,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1612110043, now seen corresponding path program 1 times [2021-11-23 16:47:06,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:06,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1425694507] [2021-11-23 16:47:06,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:06,233 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:06,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:06,235 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:06,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 16:47:06,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:06,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:47:06,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:07,659 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 16:47:07,660 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:47:07,660 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:07,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1425694507] [2021-11-23 16:47:07,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1425694507] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:07,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:07,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:47:07,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399899528] [2021-11-23 16:47:07,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:07,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:47:07,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:07,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:47:07,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:47:07,662 INFO L87 Difference]: Start difference. First operand 390 states and 505 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:08,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:08,017 INFO L93 Difference]: Finished difference Result 533 states and 702 transitions. [2021-11-23 16:47:08,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:47:08,018 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-11-23 16:47:08,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:08,021 INFO L225 Difference]: With dead ends: 533 [2021-11-23 16:47:08,021 INFO L226 Difference]: Without dead ends: 390 [2021-11-23 16:47:08,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 70 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 16:47:08,023 INFO L933 BasicCegarLoop]: 484 mSDtfsCounter, 43 mSDsluCounter, 1681 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 2165 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 769 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:08,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 2165 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 188 Invalid, 0 Unknown, 769 Unchecked, 0.3s Time] [2021-11-23 16:47:08,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-23 16:47:08,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2021-11-23 16:47:08,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 374 states have (on average 1.3475935828877006) internal successors, (504), 389 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:08,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 504 transitions. [2021-11-23 16:47:08,063 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 504 transitions. Word has length 77 [2021-11-23 16:47:08,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:08,064 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 504 transitions. [2021-11-23 16:47:08,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:08,064 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 504 transitions. [2021-11-23 16:47:08,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 16:47:08,066 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:08,066 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] [2021-11-23 16:47:08,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:08,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:47:08,283 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:47:08,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:08,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1927792199, now seen corresponding path program 1 times [2021-11-23 16:47:08,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:08,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1218768351] [2021-11-23 16:47:08,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:08,284 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:08,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:08,285 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:08,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 16:47:08,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:08,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:47:08,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:09,590 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 16:47:09,590 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:47:09,591 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:09,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1218768351] [2021-11-23 16:47:09,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1218768351] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:09,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:09,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:47:09,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537910294] [2021-11-23 16:47:09,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:09,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:47:09,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:09,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:47:09,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:47:09,594 INFO L87 Difference]: Start difference. First operand 390 states and 504 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:09,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:09,880 INFO L93 Difference]: Finished difference Result 488 states and 646 transitions. [2021-11-23 16:47:09,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:47:09,881 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-11-23 16:47:09,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:09,883 INFO L225 Difference]: With dead ends: 488 [2021-11-23 16:47:09,884 INFO L226 Difference]: Without dead ends: 390 [2021-11-23 16:47:09,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 70 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 16:47:09,885 INFO L933 BasicCegarLoop]: 479 mSDtfsCounter, 42 mSDsluCounter, 1679 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 2158 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 754 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:09,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 2158 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 186 Invalid, 0 Unknown, 754 Unchecked, 0.2s Time] [2021-11-23 16:47:09,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-23 16:47:09,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2021-11-23 16:47:09,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 374 states have (on average 1.3449197860962567) internal successors, (503), 389 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:09,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 503 transitions. [2021-11-23 16:47:09,901 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 503 transitions. Word has length 77 [2021-11-23 16:47:09,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:09,902 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 503 transitions. [2021-11-23 16:47:09,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:09,903 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 503 transitions. [2021-11-23 16:47:09,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 16:47:09,904 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:09,905 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] [2021-11-23 16:47:09,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:10,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:47:10,119 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:47:10,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:10,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1181439000, now seen corresponding path program 1 times [2021-11-23 16:47:10,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:10,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1464194441] [2021-11-23 16:47:10,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:10,121 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:10,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:10,121 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:10,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 16:47:10,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:10,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:47:10,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:11,457 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 16:47:11,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:47:11,457 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:11,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1464194441] [2021-11-23 16:47:11,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1464194441] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:11,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:11,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:47:11,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033306074] [2021-11-23 16:47:11,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:11,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:47:11,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:11,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:47:11,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:47:11,459 INFO L87 Difference]: Start difference. First operand 390 states and 503 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:11,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:11,500 INFO L93 Difference]: Finished difference Result 466 states and 618 transitions. [2021-11-23 16:47:11,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 16:47:11,501 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-11-23 16:47:11,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:11,504 INFO L225 Difference]: With dead ends: 466 [2021-11-23 16:47:11,504 INFO L226 Difference]: Without dead ends: 390 [2021-11-23 16:47:11,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 70 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 16:47:11,506 INFO L933 BasicCegarLoop]: 475 mSDtfsCounter, 51 mSDsluCounter, 1195 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1670 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 567 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:11,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 1670 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 567 Unchecked, 0.0s Time] [2021-11-23 16:47:11,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-23 16:47:11,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2021-11-23 16:47:11,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 374 states have (on average 1.3422459893048129) internal successors, (502), 389 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:11,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 502 transitions. [2021-11-23 16:47:11,533 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 502 transitions. Word has length 77 [2021-11-23 16:47:11,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:11,534 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 502 transitions. [2021-11-23 16:47:11,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:11,534 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 502 transitions. [2021-11-23 16:47:11,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 16:47:11,537 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:11,537 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] [2021-11-23 16:47:11,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:11,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:47:11,751 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:47:11,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:11,752 INFO L85 PathProgramCache]: Analyzing trace with hash 540447535, now seen corresponding path program 1 times [2021-11-23 16:47:11,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:11,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1036458581] [2021-11-23 16:47:11,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:11,752 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:11,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:11,756 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:11,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 16:47:11,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:11,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:47:11,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:13,008 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 16:47:13,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:47:13,009 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:13,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1036458581] [2021-11-23 16:47:13,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1036458581] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:13,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:13,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:47:13,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139703870] [2021-11-23 16:47:13,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:13,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:47:13,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:13,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:47:13,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:47:13,012 INFO L87 Difference]: Start difference. First operand 390 states and 502 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:13,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:13,431 INFO L93 Difference]: Finished difference Result 466 states and 616 transitions. [2021-11-23 16:47:13,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:47:13,432 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-11-23 16:47:13,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:13,434 INFO L225 Difference]: With dead ends: 466 [2021-11-23 16:47:13,434 INFO L226 Difference]: Without dead ends: 390 [2021-11-23 16:47:13,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 70 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 16:47:13,435 INFO L933 BasicCegarLoop]: 473 mSDtfsCounter, 43 mSDsluCounter, 1425 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 1898 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 561 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:13,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 1898 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 357 Invalid, 0 Unknown, 561 Unchecked, 0.4s Time] [2021-11-23 16:47:13,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-23 16:47:13,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2021-11-23 16:47:13,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 374 states have (on average 1.339572192513369) internal successors, (501), 389 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:13,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 501 transitions. [2021-11-23 16:47:13,449 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 501 transitions. Word has length 77 [2021-11-23 16:47:13,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:13,450 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 501 transitions. [2021-11-23 16:47:13,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:13,450 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 501 transitions. [2021-11-23 16:47:13,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 16:47:13,452 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:13,453 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] [2021-11-23 16:47:13,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-23 16:47:13,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:47:13,667 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:47:13,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:13,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1913205315, now seen corresponding path program 1 times [2021-11-23 16:47:13,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:13,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [660836133] [2021-11-23 16:47:13,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:13,669 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:13,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:13,671 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:13,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 16:47:13,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:13,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:47:13,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:14,857 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 16:47:14,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:47:14,858 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:14,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [660836133] [2021-11-23 16:47:14,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [660836133] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:14,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:14,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:47:14,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900925865] [2021-11-23 16:47:14,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:14,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:47:14,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:14,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:47:14,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:47:14,860 INFO L87 Difference]: Start difference. First operand 390 states and 501 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:15,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:15,213 INFO L93 Difference]: Finished difference Result 462 states and 612 transitions. [2021-11-23 16:47:15,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:47:15,214 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-11-23 16:47:15,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:15,216 INFO L225 Difference]: With dead ends: 462 [2021-11-23 16:47:15,216 INFO L226 Difference]: Without dead ends: 390 [2021-11-23 16:47:15,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 70 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 16:47:15,218 INFO L933 BasicCegarLoop]: 472 mSDtfsCounter, 39 mSDsluCounter, 1670 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 2142 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 732 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:15,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 2142 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 355 Invalid, 0 Unknown, 732 Unchecked, 0.3s Time] [2021-11-23 16:47:15,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-23 16:47:15,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2021-11-23 16:47:15,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 374 states have (on average 1.3368983957219251) internal successors, (500), 389 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:15,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 500 transitions. [2021-11-23 16:47:15,233 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 500 transitions. Word has length 77 [2021-11-23 16:47:15,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:15,234 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 500 transitions. [2021-11-23 16:47:15,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:15,234 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 500 transitions. [2021-11-23 16:47:15,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 16:47:15,236 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:15,237 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] [2021-11-23 16:47:15,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:15,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:47:15,451 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:47:15,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:15,451 INFO L85 PathProgramCache]: Analyzing trace with hash -738667670, now seen corresponding path program 1 times [2021-11-23 16:47:15,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:15,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1715906152] [2021-11-23 16:47:15,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:15,452 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:15,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:15,453 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:15,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 16:47:15,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:15,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:47:15,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:16,818 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 16:47:16,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:47:16,818 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:16,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1715906152] [2021-11-23 16:47:16,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1715906152] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:16,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:16,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:47:16,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344373803] [2021-11-23 16:47:16,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:16,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:47:16,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:16,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:47:16,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:47:16,821 INFO L87 Difference]: Start difference. First operand 390 states and 500 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:17,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:17,282 INFO L93 Difference]: Finished difference Result 473 states and 621 transitions. [2021-11-23 16:47:17,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:47:17,283 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-11-23 16:47:17,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:17,286 INFO L225 Difference]: With dead ends: 473 [2021-11-23 16:47:17,286 INFO L226 Difference]: Without dead ends: 392 [2021-11-23 16:47:17,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 72 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 16:47:17,290 INFO L933 BasicCegarLoop]: 471 mSDtfsCounter, 44 mSDsluCounter, 1423 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 1894 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 568 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:17,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 1894 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 353 Invalid, 0 Unknown, 568 Unchecked, 0.4s Time] [2021-11-23 16:47:17,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-11-23 16:47:17,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 390. [2021-11-23 16:47:17,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 374 states have (on average 1.3342245989304813) internal successors, (499), 389 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:17,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 499 transitions. [2021-11-23 16:47:17,305 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 499 transitions. Word has length 79 [2021-11-23 16:47:17,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:17,305 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 499 transitions. [2021-11-23 16:47:17,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:17,306 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 499 transitions. [2021-11-23 16:47:17,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 16:47:17,308 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:17,308 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] [2021-11-23 16:47:17,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:17,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:47:17,515 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:47:17,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:17,515 INFO L85 PathProgramCache]: Analyzing trace with hash 749865809, now seen corresponding path program 1 times [2021-11-23 16:47:17,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:17,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [640537082] [2021-11-23 16:47:17,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:17,516 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:17,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:17,518 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:17,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 16:47:17,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:17,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:47:17,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:18,862 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 16:47:18,862 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:47:18,862 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:18,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [640537082] [2021-11-23 16:47:18,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [640537082] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:18,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:18,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:47:18,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341539366] [2021-11-23 16:47:18,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:18,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:47:18,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:18,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:47:18,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:47:18,864 INFO L87 Difference]: Start difference. First operand 390 states and 499 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:18,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:18,885 INFO L93 Difference]: Finished difference Result 460 states and 605 transitions. [2021-11-23 16:47:18,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 16:47:18,886 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-11-23 16:47:18,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:18,888 INFO L225 Difference]: With dead ends: 460 [2021-11-23 16:47:18,888 INFO L226 Difference]: Without dead ends: 391 [2021-11-23 16:47:18,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 72 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 16:47:18,890 INFO L933 BasicCegarLoop]: 467 mSDtfsCounter, 43 mSDsluCounter, 1443 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 1910 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 717 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:18,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 1910 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 717 Unchecked, 0.0s Time] [2021-11-23 16:47:18,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-11-23 16:47:18,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 390. [2021-11-23 16:47:18,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 374 states have (on average 1.3315508021390374) internal successors, (498), 389 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:18,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 498 transitions. [2021-11-23 16:47:18,905 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 498 transitions. Word has length 79 [2021-11-23 16:47:18,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:18,906 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 498 transitions. [2021-11-23 16:47:18,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:18,907 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 498 transitions. [2021-11-23 16:47:18,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 16:47:18,908 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:18,908 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] [2021-11-23 16:47:18,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:19,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:47:19,123 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:47:19,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:19,124 INFO L85 PathProgramCache]: Analyzing trace with hash 261207811, now seen corresponding path program 1 times [2021-11-23 16:47:19,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:19,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1210165586] [2021-11-23 16:47:19,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:19,124 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:19,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:19,125 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:19,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 16:47:19,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:19,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:47:19,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:20,314 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 16:47:20,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:47:20,314 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:20,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1210165586] [2021-11-23 16:47:20,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1210165586] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:20,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:20,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:47:20,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839425812] [2021-11-23 16:47:20,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:20,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:47:20,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:20,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:47:20,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:47:20,317 INFO L87 Difference]: Start difference. First operand 390 states and 498 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:20,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:20,596 INFO L93 Difference]: Finished difference Result 494 states and 645 transitions. [2021-11-23 16:47:20,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:47:20,597 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-11-23 16:47:20,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:20,603 INFO L225 Difference]: With dead ends: 494 [2021-11-23 16:47:20,604 INFO L226 Difference]: Without dead ends: 390 [2021-11-23 16:47:20,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 72 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 16:47:20,605 INFO L933 BasicCegarLoop]: 473 mSDtfsCounter, 43 mSDsluCounter, 927 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 1400 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:20,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 1400 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 180 Invalid, 0 Unknown, 210 Unchecked, 0.2s Time] [2021-11-23 16:47:20,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-23 16:47:20,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2021-11-23 16:47:20,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 374 states have (on average 1.3288770053475936) internal successors, (497), 389 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:20,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 497 transitions. [2021-11-23 16:47:20,621 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 497 transitions. Word has length 79 [2021-11-23 16:47:20,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:20,622 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 497 transitions. [2021-11-23 16:47:20,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:20,622 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 497 transitions. [2021-11-23 16:47:20,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 16:47:20,624 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:20,624 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] [2021-11-23 16:47:20,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:20,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:47:20,838 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:47:20,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:20,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1928072588, now seen corresponding path program 1 times [2021-11-23 16:47:20,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:20,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [497559359] [2021-11-23 16:47:20,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:20,840 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:20,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:20,840 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:20,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 16:47:21,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:21,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:47:21,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:22,137 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 16:47:22,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:47:22,138 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:22,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [497559359] [2021-11-23 16:47:22,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [497559359] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:22,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:22,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:47:22,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326587760] [2021-11-23 16:47:22,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:22,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:47:22,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:22,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:47:22,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:47:22,140 INFO L87 Difference]: Start difference. First operand 390 states and 497 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:22,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:22,387 INFO L93 Difference]: Finished difference Result 407 states and 515 transitions. [2021-11-23 16:47:22,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:47:22,388 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-11-23 16:47:22,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:22,391 INFO L225 Difference]: With dead ends: 407 [2021-11-23 16:47:22,392 INFO L226 Difference]: Without dead ends: 390 [2021-11-23 16:47:22,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 72 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 16:47:22,393 INFO L933 BasicCegarLoop]: 468 mSDtfsCounter, 61 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 915 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:22,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 915 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 168 Invalid, 0 Unknown, 43 Unchecked, 0.2s Time] [2021-11-23 16:47:22,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-23 16:47:22,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2021-11-23 16:47:22,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 374 states have (on average 1.3262032085561497) internal successors, (496), 389 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:22,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 496 transitions. [2021-11-23 16:47:22,409 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 496 transitions. Word has length 79 [2021-11-23 16:47:22,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:22,409 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 496 transitions. [2021-11-23 16:47:22,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:22,410 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 496 transitions. [2021-11-23 16:47:22,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 16:47:22,411 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:22,412 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] [2021-11-23 16:47:22,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:22,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:47:22,626 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:47:22,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:22,627 INFO L85 PathProgramCache]: Analyzing trace with hash -439539109, now seen corresponding path program 1 times [2021-11-23 16:47:22,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:22,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [381239654] [2021-11-23 16:47:22,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:22,628 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:22,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:22,630 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:22,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-23 16:47:22,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:22,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:47:22,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:24,120 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 16:47:24,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:47:24,121 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:24,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [381239654] [2021-11-23 16:47:24,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [381239654] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:24,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:24,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:47:24,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080020131] [2021-11-23 16:47:24,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:24,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:47:24,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:24,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:47:24,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:47:24,125 INFO L87 Difference]: Start difference. First operand 390 states and 496 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:24,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:24,408 INFO L93 Difference]: Finished difference Result 395 states and 500 transitions. [2021-11-23 16:47:24,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:47:24,409 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-11-23 16:47:24,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:24,412 INFO L225 Difference]: With dead ends: 395 [2021-11-23 16:47:24,412 INFO L226 Difference]: Without dead ends: 390 [2021-11-23 16:47:24,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 72 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 16:47:24,414 INFO L933 BasicCegarLoop]: 463 mSDtfsCounter, 61 mSDsluCounter, 946 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1409 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 379 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:24,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 1409 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 163 Invalid, 0 Unknown, 379 Unchecked, 0.2s Time] [2021-11-23 16:47:24,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-23 16:47:24,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2021-11-23 16:47:24,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 374 states have (on average 1.3235294117647058) internal successors, (495), 389 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:24,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 495 transitions. [2021-11-23 16:47:24,432 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 495 transitions. Word has length 79 [2021-11-23 16:47:24,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:24,432 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 495 transitions. [2021-11-23 16:47:24,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:24,433 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 495 transitions. [2021-11-23 16:47:24,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 16:47:24,435 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:24,435 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] [2021-11-23 16:47:24,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:24,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:47:24,651 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:47:24,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:24,651 INFO L85 PathProgramCache]: Analyzing trace with hash -845454890, now seen corresponding path program 1 times [2021-11-23 16:47:24,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:24,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [770910542] [2021-11-23 16:47:24,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:24,653 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:24,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:24,654 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:24,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-23 16:47:24,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:24,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:47:24,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:26,033 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 16:47:26,034 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:47:26,034 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:26,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [770910542] [2021-11-23 16:47:26,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [770910542] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:26,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:26,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:47:26,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969191458] [2021-11-23 16:47:26,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:26,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:47:26,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:26,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:47:26,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:47:26,036 INFO L87 Difference]: Start difference. First operand 390 states and 495 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:26,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:26,263 INFO L93 Difference]: Finished difference Result 395 states and 499 transitions. [2021-11-23 16:47:26,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:47:26,263 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-11-23 16:47:26,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:26,265 INFO L225 Difference]: With dead ends: 395 [2021-11-23 16:47:26,266 INFO L226 Difference]: Without dead ends: 390 [2021-11-23 16:47:26,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 72 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 16:47:26,267 INFO L933 BasicCegarLoop]: 462 mSDtfsCounter, 61 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1165 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:26,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 1165 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 162 Invalid, 0 Unknown, 215 Unchecked, 0.2s Time] [2021-11-23 16:47:26,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-23 16:47:26,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2021-11-23 16:47:26,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 374 states have (on average 1.320855614973262) internal successors, (494), 389 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:26,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 494 transitions. [2021-11-23 16:47:26,278 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 494 transitions. Word has length 79 [2021-11-23 16:47:26,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:26,279 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 494 transitions. [2021-11-23 16:47:26,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:26,279 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 494 transitions. [2021-11-23 16:47:26,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 16:47:26,281 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:26,281 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] [2021-11-23 16:47:26,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:26,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:47:26,496 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:47:26,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:26,496 INFO L85 PathProgramCache]: Analyzing trace with hash 88191580, now seen corresponding path program 1 times [2021-11-23 16:47:26,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:26,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [581771837] [2021-11-23 16:47:26,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:26,497 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:26,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:26,498 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:26,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-23 16:47:26,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:26,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:47:26,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:27,909 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 16:47:27,910 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:47:27,910 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:27,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [581771837] [2021-11-23 16:47:27,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [581771837] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:27,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:27,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:47:27,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450101650] [2021-11-23 16:47:27,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:27,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:47:27,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:27,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:47:27,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:47:27,913 INFO L87 Difference]: Start difference. First operand 390 states and 494 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:28,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:28,251 INFO L93 Difference]: Finished difference Result 456 states and 596 transitions. [2021-11-23 16:47:28,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:47:28,255 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-11-23 16:47:28,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:28,257 INFO L225 Difference]: With dead ends: 456 [2021-11-23 16:47:28,257 INFO L226 Difference]: Without dead ends: 390 [2021-11-23 16:47:28,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 72 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 16:47:28,258 INFO L933 BasicCegarLoop]: 461 mSDtfsCounter, 43 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 1392 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:28,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 1392 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 345 Invalid, 0 Unknown, 206 Unchecked, 0.3s Time] [2021-11-23 16:47:28,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-23 16:47:28,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2021-11-23 16:47:28,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 374 states have (on average 1.3181818181818181) internal successors, (493), 389 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:28,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 493 transitions. [2021-11-23 16:47:28,274 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 493 transitions. Word has length 79 [2021-11-23 16:47:28,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:28,274 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 493 transitions. [2021-11-23 16:47:28,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:28,275 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 493 transitions. [2021-11-23 16:47:28,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 16:47:28,276 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:28,276 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] [2021-11-23 16:47:28,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:28,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:47:28,486 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:47:28,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:28,487 INFO L85 PathProgramCache]: Analyzing trace with hash 310074252, now seen corresponding path program 1 times [2021-11-23 16:47:28,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:28,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1142479943] [2021-11-23 16:47:28,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:28,488 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:28,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:28,489 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:28,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-23 16:47:28,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:28,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:47:28,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:29,814 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 16:47:29,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:47:29,814 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:29,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1142479943] [2021-11-23 16:47:29,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1142479943] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:29,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:29,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:47:29,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435869422] [2021-11-23 16:47:29,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:29,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:47:29,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:29,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:47:29,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:47:29,816 INFO L87 Difference]: Start difference. First operand 390 states and 493 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:30,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:30,027 INFO L93 Difference]: Finished difference Result 460 states and 599 transitions. [2021-11-23 16:47:30,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:47:30,028 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-11-23 16:47:30,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:30,030 INFO L225 Difference]: With dead ends: 460 [2021-11-23 16:47:30,030 INFO L226 Difference]: Without dead ends: 391 [2021-11-23 16:47:30,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 72 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 16:47:30,031 INFO L933 BasicCegarLoop]: 460 mSDtfsCounter, 61 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:30,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 926 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 160 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2021-11-23 16:47:30,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-11-23 16:47:30,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 390. [2021-11-23 16:47:30,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 374 states have (on average 1.3155080213903743) internal successors, (492), 389 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:30,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 492 transitions. [2021-11-23 16:47:30,047 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 492 transitions. Word has length 79 [2021-11-23 16:47:30,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:30,048 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 492 transitions. [2021-11-23 16:47:30,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:30,048 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 492 transitions. [2021-11-23 16:47:30,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 16:47:30,050 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:30,050 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] [2021-11-23 16:47:30,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:30,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:47:30,264 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:47:30,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:30,265 INFO L85 PathProgramCache]: Analyzing trace with hash -274145819, now seen corresponding path program 1 times [2021-11-23 16:47:30,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:30,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1525403117] [2021-11-23 16:47:30,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:30,266 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:30,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:30,267 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:30,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-23 16:47:30,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:30,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:47:30,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:31,488 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 16:47:31,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:47:31,488 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:31,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1525403117] [2021-11-23 16:47:31,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1525403117] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:31,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:31,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:47:31,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374106654] [2021-11-23 16:47:31,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:31,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:47:31,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:31,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:47:31,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:47:31,491 INFO L87 Difference]: Start difference. First operand 390 states and 492 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:31,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:31,512 INFO L93 Difference]: Finished difference Result 471 states and 611 transitions. [2021-11-23 16:47:31,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 16:47:31,514 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-11-23 16:47:31,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:31,516 INFO L225 Difference]: With dead ends: 471 [2021-11-23 16:47:31,516 INFO L226 Difference]: Without dead ends: 390 [2021-11-23 16:47:31,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 72 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 16:47:31,518 INFO L933 BasicCegarLoop]: 464 mSDtfsCounter, 43 mSDsluCounter, 1200 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 1664 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 532 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:31,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 1664 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 532 Unchecked, 0.0s Time] [2021-11-23 16:47:31,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-23 16:47:31,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2021-11-23 16:47:31,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 374 states have (on average 1.3128342245989304) internal successors, (491), 389 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:31,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 491 transitions. [2021-11-23 16:47:31,532 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 491 transitions. Word has length 79 [2021-11-23 16:47:31,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:31,533 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 491 transitions. [2021-11-23 16:47:31,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:31,533 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 491 transitions. [2021-11-23 16:47:31,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 16:47:31,535 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:31,535 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] [2021-11-23 16:47:31,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:31,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:47:31,749 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:47:31,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:31,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1678498669, now seen corresponding path program 1 times [2021-11-23 16:47:31,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:31,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2129784598] [2021-11-23 16:47:31,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:31,751 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:31,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:31,752 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:31,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-23 16:47:31,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:31,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:47:31,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:33,017 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 16:47:33,017 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:47:33,017 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:33,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2129784598] [2021-11-23 16:47:33,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2129784598] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:33,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:33,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:47:33,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321949636] [2021-11-23 16:47:33,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:33,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:47:33,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:33,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:47:33,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:47:33,021 INFO L87 Difference]: Start difference. First operand 390 states and 491 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:33,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:33,438 INFO L93 Difference]: Finished difference Result 463 states and 601 transitions. [2021-11-23 16:47:33,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:47:33,439 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-11-23 16:47:33,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:33,442 INFO L225 Difference]: With dead ends: 463 [2021-11-23 16:47:33,443 INFO L226 Difference]: Without dead ends: 394 [2021-11-23 16:47:33,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 72 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 16:47:33,444 INFO L933 BasicCegarLoop]: 460 mSDtfsCounter, 45 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 1131 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:33,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 1131 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 344 Invalid, 0 Unknown, 44 Unchecked, 0.4s Time] [2021-11-23 16:47:33,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-11-23 16:47:33,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 394. [2021-11-23 16:47:33,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 378 states have (on average 1.3095238095238095) internal successors, (495), 393 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:33,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 495 transitions. [2021-11-23 16:47:33,461 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 495 transitions. Word has length 79 [2021-11-23 16:47:33,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:33,462 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 495 transitions. [2021-11-23 16:47:33,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:33,462 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 495 transitions. [2021-11-23 16:47:33,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 16:47:33,471 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:33,471 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] [2021-11-23 16:47:33,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:33,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:47:33,686 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:47:33,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:33,687 INFO L85 PathProgramCache]: Analyzing trace with hash 861543357, now seen corresponding path program 1 times [2021-11-23 16:47:33,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:33,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1485944409] [2021-11-23 16:47:33,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:33,688 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:33,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:33,690 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:33,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-23 16:47:33,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:33,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:47:33,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:35,055 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 16:47:35,055 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:47:35,056 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:35,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1485944409] [2021-11-23 16:47:35,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1485944409] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:35,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:35,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:47:35,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984363926] [2021-11-23 16:47:35,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:35,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:47:35,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:35,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:47:35,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:47:35,059 INFO L87 Difference]: Start difference. First operand 394 states and 495 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:35,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:35,464 INFO L93 Difference]: Finished difference Result 460 states and 597 transitions. [2021-11-23 16:47:35,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:47:35,465 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-11-23 16:47:35,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:35,467 INFO L225 Difference]: With dead ends: 460 [2021-11-23 16:47:35,467 INFO L226 Difference]: Without dead ends: 394 [2021-11-23 16:47:35,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 72 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 16:47:35,469 INFO L933 BasicCegarLoop]: 458 mSDtfsCounter, 43 mSDsluCounter, 1411 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 1869 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 525 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:35,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 1869 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 339 Invalid, 0 Unknown, 525 Unchecked, 0.4s Time] [2021-11-23 16:47:35,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-11-23 16:47:35,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 394. [2021-11-23 16:47:35,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 378 states have (on average 1.306878306878307) internal successors, (494), 393 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:35,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 494 transitions. [2021-11-23 16:47:35,484 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 494 transitions. Word has length 79 [2021-11-23 16:47:35,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:35,485 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 494 transitions. [2021-11-23 16:47:35,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:35,485 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 494 transitions. [2021-11-23 16:47:35,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 16:47:35,487 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:35,487 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] [2021-11-23 16:47:35,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:35,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:47:35,702 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:47:35,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:35,702 INFO L85 PathProgramCache]: Analyzing trace with hash -861388972, now seen corresponding path program 1 times [2021-11-23 16:47:35,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:35,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [248932013] [2021-11-23 16:47:35,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:35,703 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:35,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:35,704 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:35,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-23 16:47:35,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:35,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:47:35,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:37,026 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 16:47:37,026 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:47:37,027 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:37,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [248932013] [2021-11-23 16:47:37,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [248932013] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:37,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:37,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:47:37,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787158559] [2021-11-23 16:47:37,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:37,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:47:37,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:37,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:47:37,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:47:37,029 INFO L87 Difference]: Start difference. First operand 394 states and 494 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:37,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:37,456 INFO L93 Difference]: Finished difference Result 399 states and 498 transitions. [2021-11-23 16:47:37,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:47:37,457 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-11-23 16:47:37,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:37,460 INFO L225 Difference]: With dead ends: 399 [2021-11-23 16:47:37,460 INFO L226 Difference]: Without dead ends: 394 [2021-11-23 16:47:37,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 72 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 16:47:37,461 INFO L933 BasicCegarLoop]: 457 mSDtfsCounter, 53 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 1380 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:37,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 1380 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 337 Invalid, 0 Unknown, 210 Unchecked, 0.4s Time] [2021-11-23 16:47:37,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-11-23 16:47:37,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 394. [2021-11-23 16:47:37,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 378 states have (on average 1.3042328042328042) internal successors, (493), 393 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:37,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 493 transitions. [2021-11-23 16:47:37,477 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 493 transitions. Word has length 79 [2021-11-23 16:47:37,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:37,478 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 493 transitions. [2021-11-23 16:47:37,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:37,478 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 493 transitions. [2021-11-23 16:47:37,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 16:47:37,480 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:37,480 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] [2021-11-23 16:47:37,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:37,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:47:37,695 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:47:37,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:37,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1854145171, now seen corresponding path program 1 times [2021-11-23 16:47:37,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:37,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [432656378] [2021-11-23 16:47:37,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:37,696 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:37,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:37,698 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:37,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-23 16:47:37,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:37,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:47:37,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:38,971 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 16:47:38,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:47:38,971 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:38,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [432656378] [2021-11-23 16:47:38,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [432656378] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:38,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:38,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:47:38,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003146434] [2021-11-23 16:47:38,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:38,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:47:38,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:38,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:47:38,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:47:38,973 INFO L87 Difference]: Start difference. First operand 394 states and 493 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:39,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:39,345 INFO L93 Difference]: Finished difference Result 460 states and 595 transitions. [2021-11-23 16:47:39,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:47:39,346 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-11-23 16:47:39,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:39,349 INFO L225 Difference]: With dead ends: 460 [2021-11-23 16:47:39,349 INFO L226 Difference]: Without dead ends: 394 [2021-11-23 16:47:39,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 72 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 16:47:39,350 INFO L933 BasicCegarLoop]: 456 mSDtfsCounter, 54 mSDsluCounter, 1166 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1622 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 365 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:39,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 1622 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 335 Invalid, 0 Unknown, 365 Unchecked, 0.3s Time] [2021-11-23 16:47:39,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-11-23 16:47:39,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 394. [2021-11-23 16:47:39,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 378 states have (on average 1.3015873015873016) internal successors, (492), 393 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:39,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 492 transitions. [2021-11-23 16:47:39,366 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 492 transitions. Word has length 79 [2021-11-23 16:47:39,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:39,366 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 492 transitions. [2021-11-23 16:47:39,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:39,367 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 492 transitions. [2021-11-23 16:47:39,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 16:47:39,368 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:39,369 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] [2021-11-23 16:47:39,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:39,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:47:39,583 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:47:39,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:39,583 INFO L85 PathProgramCache]: Analyzing trace with hash -403243016, now seen corresponding path program 1 times [2021-11-23 16:47:39,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:39,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1423790312] [2021-11-23 16:47:39,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:39,586 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:39,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:39,587 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:39,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-23 16:47:39,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:39,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:47:39,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:40,881 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 16:47:40,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:47:40,882 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:40,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1423790312] [2021-11-23 16:47:40,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1423790312] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:40,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:40,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:47:40,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222470547] [2021-11-23 16:47:40,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:40,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:47:40,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:40,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:47:40,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:47:40,884 INFO L87 Difference]: Start difference. First operand 394 states and 492 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:41,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:41,143 INFO L93 Difference]: Finished difference Result 460 states and 594 transitions. [2021-11-23 16:47:41,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:47:41,143 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-11-23 16:47:41,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:41,145 INFO L225 Difference]: With dead ends: 460 [2021-11-23 16:47:41,145 INFO L226 Difference]: Without dead ends: 394 [2021-11-23 16:47:41,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 72 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 16:47:41,147 INFO L933 BasicCegarLoop]: 455 mSDtfsCounter, 43 mSDsluCounter, 1651 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 2106 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 672 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:41,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 2106 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 180 Invalid, 0 Unknown, 672 Unchecked, 0.2s Time] [2021-11-23 16:47:41,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-11-23 16:47:41,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 394. [2021-11-23 16:47:41,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 378 states have (on average 1.2989417989417988) internal successors, (491), 393 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:41,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 491 transitions. [2021-11-23 16:47:41,160 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 491 transitions. Word has length 79 [2021-11-23 16:47:41,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:41,161 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 491 transitions. [2021-11-23 16:47:41,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:41,162 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 491 transitions. [2021-11-23 16:47:41,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-23 16:47:41,163 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:41,163 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] [2021-11-23 16:47:41,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-11-23 16:47:41,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:47:41,377 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:47:41,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:41,378 INFO L85 PathProgramCache]: Analyzing trace with hash 724648618, now seen corresponding path program 1 times [2021-11-23 16:47:41,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:41,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1412852106] [2021-11-23 16:47:41,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:41,379 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:41,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:41,379 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:41,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-23 16:47:41,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:41,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:47:41,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:42,691 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 16:47:42,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:47:42,691 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:42,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1412852106] [2021-11-23 16:47:42,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1412852106] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:42,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:42,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:47:42,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234402019] [2021-11-23 16:47:42,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:42,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:47:42,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:42,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:47:42,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:47:42,694 INFO L87 Difference]: Start difference. First operand 394 states and 491 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:43,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:43,080 INFO L93 Difference]: Finished difference Result 463 states and 596 transitions. [2021-11-23 16:47:43,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:47:43,081 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 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 80 [2021-11-23 16:47:43,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:43,083 INFO L225 Difference]: With dead ends: 463 [2021-11-23 16:47:43,083 INFO L226 Difference]: Without dead ends: 394 [2021-11-23 16:47:43,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 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 16:47:43,085 INFO L933 BasicCegarLoop]: 454 mSDtfsCounter, 38 mSDsluCounter, 1414 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1868 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 508 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:43,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 1868 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 331 Invalid, 0 Unknown, 508 Unchecked, 0.3s Time] [2021-11-23 16:47:43,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-11-23 16:47:43,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 390. [2021-11-23 16:47:43,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 374 states have (on average 1.2994652406417113) internal successors, (486), 389 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:43,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 486 transitions. [2021-11-23 16:47:43,100 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 486 transitions. Word has length 80 [2021-11-23 16:47:43,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:43,101 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 486 transitions. [2021-11-23 16:47:43,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:43,101 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 486 transitions. [2021-11-23 16:47:43,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-23 16:47:43,102 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:43,103 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] [2021-11-23 16:47:43,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-11-23 16:47:43,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:47:43,317 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:47:43,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:43,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1565003779, now seen corresponding path program 1 times [2021-11-23 16:47:43,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:43,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1669230594] [2021-11-23 16:47:43,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:43,319 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:43,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:43,320 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:43,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-23 16:47:43,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:43,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:47:43,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:44,500 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 16:47:44,500 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:47:44,500 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:44,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1669230594] [2021-11-23 16:47:44,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1669230594] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:44,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:44,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:47:44,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913833198] [2021-11-23 16:47:44,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:44,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:47:44,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:44,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:47:44,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:47:44,503 INFO L87 Difference]: Start difference. First operand 390 states and 486 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:44,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:44,706 INFO L93 Difference]: Finished difference Result 454 states and 586 transitions. [2021-11-23 16:47:44,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:47:44,707 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 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 80 [2021-11-23 16:47:44,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:44,709 INFO L225 Difference]: With dead ends: 454 [2021-11-23 16:47:44,709 INFO L226 Difference]: Without dead ends: 389 [2021-11-23 16:47:44,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 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 16:47:44,710 INFO L933 BasicCegarLoop]: 452 mSDtfsCounter, 51 mSDsluCounter, 954 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1406 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 349 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:44,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 1406 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 152 Invalid, 0 Unknown, 349 Unchecked, 0.2s Time] [2021-11-23 16:47:44,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-11-23 16:47:44,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 389. [2021-11-23 16:47:44,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 373 states have (on average 1.2975871313672922) internal successors, (484), 388 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:44,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 484 transitions. [2021-11-23 16:47:44,725 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 484 transitions. Word has length 80 [2021-11-23 16:47:44,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:44,725 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 484 transitions. [2021-11-23 16:47:44,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:44,726 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 484 transitions. [2021-11-23 16:47:44,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-23 16:47:44,727 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:44,728 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] [2021-11-23 16:47:44,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:44,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:47:44,942 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:47:44,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:44,943 INFO L85 PathProgramCache]: Analyzing trace with hash 484129246, now seen corresponding path program 1 times [2021-11-23 16:47:44,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:44,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1715820983] [2021-11-23 16:47:44,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:44,943 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:44,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:44,944 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:44,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-23 16:47:45,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:45,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-23 16:47:45,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:54,799 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 16:47:54,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:47:54,800 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:54,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1715820983] [2021-11-23 16:47:54,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1715820983] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:54,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:54,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-11-23 16:47:54,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371040487] [2021-11-23 16:47:54,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:54,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-23 16:47:54,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:54,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-23 16:47:54,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-11-23 16:47:54,803 INFO L87 Difference]: Start difference. First operand 389 states and 484 transitions. Second operand has 27 states, 27 states have (on average 3.0) internal successors, (81), 27 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:55,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:55,064 INFO L93 Difference]: Finished difference Result 485 states and 623 transitions. [2021-11-23 16:47:55,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-23 16:47:55,064 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.0) internal successors, (81), 27 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-11-23 16:47:55,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:55,067 INFO L225 Difference]: With dead ends: 485 [2021-11-23 16:47:55,067 INFO L226 Difference]: Without dead ends: 405 [2021-11-23 16:47:55,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2021-11-23 16:47:55,068 INFO L933 BasicCegarLoop]: 441 mSDtfsCounter, 100 mSDsluCounter, 2618 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 3059 SdHoareTripleChecker+Invalid, 1381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1264 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:55,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 3059 Invalid, 1381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 113 Invalid, 0 Unknown, 1264 Unchecked, 0.2s Time] [2021-11-23 16:47:55,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-11-23 16:47:55,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 405. [2021-11-23 16:47:55,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 389 states have (on average 1.2956298200514138) internal successors, (504), 404 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:55,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 504 transitions. [2021-11-23 16:47:55,086 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 504 transitions. Word has length 81 [2021-11-23 16:47:55,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:55,087 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 504 transitions. [2021-11-23 16:47:55,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.0) internal successors, (81), 27 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:55,087 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 504 transitions. [2021-11-23 16:47:55,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-23 16:47:55,089 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:55,089 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] [2021-11-23 16:47:55,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:55,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:47:55,303 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:47:55,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:55,304 INFO L85 PathProgramCache]: Analyzing trace with hash 852624389, now seen corresponding path program 1 times [2021-11-23 16:47:55,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:55,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1403181374] [2021-11-23 16:47:55,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:55,305 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:55,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:55,306 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:55,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-23 16:47:55,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:55,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-23 16:47:55,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:01,883 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 16:48:01,884 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:01,884 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:01,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1403181374] [2021-11-23 16:48:01,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1403181374] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:01,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:01,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-11-23 16:48:01,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129424509] [2021-11-23 16:48:01,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:01,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-23 16:48:01,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:01,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-23 16:48:01,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2021-11-23 16:48:01,886 INFO L87 Difference]: Start difference. First operand 405 states and 504 transitions. Second operand has 26 states, 26 states have (on average 3.1153846153846154) internal successors, (81), 26 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:02,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:02,497 INFO L93 Difference]: Finished difference Result 503 states and 645 transitions. [2021-11-23 16:48:02,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-23 16:48:02,498 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1153846153846154) internal successors, (81), 26 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-11-23 16:48:02,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:02,501 INFO L225 Difference]: With dead ends: 503 [2021-11-23 16:48:02,501 INFO L226 Difference]: Without dead ends: 406 [2021-11-23 16:48:02,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2021-11-23 16:48:02,503 INFO L933 BasicCegarLoop]: 446 mSDtfsCounter, 78 mSDsluCounter, 4091 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 4537 SdHoareTripleChecker+Invalid, 1937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1650 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:02,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 4537 Invalid, 1937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 284 Invalid, 0 Unknown, 1650 Unchecked, 0.4s Time] [2021-11-23 16:48:02,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-11-23 16:48:02,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 406. [2021-11-23 16:48:02,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 390 states have (on average 1.294871794871795) internal successors, (505), 405 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:02,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 505 transitions. [2021-11-23 16:48:02,522 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 505 transitions. Word has length 81 [2021-11-23 16:48:02,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:02,523 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 505 transitions. [2021-11-23 16:48:02,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1153846153846154) internal successors, (81), 26 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:02,523 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 505 transitions. [2021-11-23 16:48:02,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-23 16:48:02,525 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:02,525 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] [2021-11-23 16:48:02,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:02,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:02,740 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:48:02,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:02,740 INFO L85 PathProgramCache]: Analyzing trace with hash 295761583, now seen corresponding path program 1 times [2021-11-23 16:48:02,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:02,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [899153330] [2021-11-23 16:48:02,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:02,741 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:02,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:02,742 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:02,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-23 16:48:02,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:02,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:48:02,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:04,340 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 16:48:04,340 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:04,341 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:04,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [899153330] [2021-11-23 16:48:04,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [899153330] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:04,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:04,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 16:48:04,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559459156] [2021-11-23 16:48:04,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:04,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 16:48:04,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:04,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 16:48:04,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:48:04,343 INFO L87 Difference]: Start difference. First operand 406 states and 505 transitions. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:04,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:04,427 INFO L93 Difference]: Finished difference Result 470 states and 605 transitions. [2021-11-23 16:48:04,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 16:48:04,427 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-11-23 16:48:04,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:04,430 INFO L225 Difference]: With dead ends: 470 [2021-11-23 16:48:04,430 INFO L226 Difference]: Without dead ends: 343 [2021-11-23 16:48:04,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 73 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 16:48:04,431 INFO L933 BasicCegarLoop]: 393 mSDtfsCounter, 39 mSDsluCounter, 1805 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 2198 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:04,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 2198 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 131 Unchecked, 0.0s Time] [2021-11-23 16:48:04,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-11-23 16:48:04,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2021-11-23 16:48:04,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 331 states have (on average 1.299093655589124) internal successors, (430), 342 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:04,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 430 transitions. [2021-11-23 16:48:04,446 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 430 transitions. Word has length 81 [2021-11-23 16:48:04,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:04,446 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 430 transitions. [2021-11-23 16:48:04,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:04,447 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 430 transitions. [2021-11-23 16:48:04,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-23 16:48:04,448 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:04,449 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] [2021-11-23 16:48:04,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:04,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:04,663 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:48:04,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:04,664 INFO L85 PathProgramCache]: Analyzing trace with hash 487027968, now seen corresponding path program 1 times [2021-11-23 16:48:04,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:04,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1157534267] [2021-11-23 16:48:04,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:04,664 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:04,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:04,665 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:04,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-23 16:48:04,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:04,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 16:48:04,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:06,512 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 16:48:06,512 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:06,513 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:06,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1157534267] [2021-11-23 16:48:06,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1157534267] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:06,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:06,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-23 16:48:06,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492393542] [2021-11-23 16:48:06,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:06,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 16:48:06,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:06,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 16:48:06,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-11-23 16:48:06,516 INFO L87 Difference]: Start difference. First operand 343 states and 430 transitions. Second operand has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:06,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:06,678 INFO L93 Difference]: Finished difference Result 407 states and 530 transitions. [2021-11-23 16:48:06,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 16:48:06,679 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-11-23 16:48:06,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:06,680 INFO L225 Difference]: With dead ends: 407 [2021-11-23 16:48:06,680 INFO L226 Difference]: Without dead ends: 226 [2021-11-23 16:48:06,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-11-23 16:48:06,681 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 47 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 1235 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:06,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 1235 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 170 Unchecked, 0.1s Time] [2021-11-23 16:48:06,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-11-23 16:48:06,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2021-11-23 16:48:06,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 219 states have (on average 1.2922374429223744) internal successors, (283), 225 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:06,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 283 transitions. [2021-11-23 16:48:06,693 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 283 transitions. Word has length 81 [2021-11-23 16:48:06,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:06,694 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 283 transitions. [2021-11-23 16:48:06,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:06,694 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 283 transitions. [2021-11-23 16:48:06,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-23 16:48:06,695 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:06,695 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] [2021-11-23 16:48:06,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2021-11-23 16:48:06,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:06,910 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:48:06,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:06,910 INFO L85 PathProgramCache]: Analyzing trace with hash 2090211926, now seen corresponding path program 1 times [2021-11-23 16:48:06,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:06,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [604679606] [2021-11-23 16:48:06,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:06,911 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:06,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:06,912 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:06,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-23 16:48:07,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:07,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:48:07,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:08,107 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 16:48:08,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:08,107 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:08,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [604679606] [2021-11-23 16:48:08,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [604679606] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:08,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:08,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:48:08,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426659860] [2021-11-23 16:48:08,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:08,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:48:08,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:08,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:48:08,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:48:08,110 INFO L87 Difference]: Start difference. First operand 226 states and 283 transitions. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:08,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:08,221 INFO L93 Difference]: Finished difference Result 308 states and 403 transitions. [2021-11-23 16:48:08,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:48:08,222 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2021-11-23 16:48:08,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:08,223 INFO L225 Difference]: With dead ends: 308 [2021-11-23 16:48:08,223 INFO L226 Difference]: Without dead ends: 226 [2021-11-23 16:48:08,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 75 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 16:48:08,224 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 60 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:08,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 549 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2021-11-23 16:48:08,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-11-23 16:48:08,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2021-11-23 16:48:08,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 219 states have (on average 1.2831050228310503) internal successors, (281), 225 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:08,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 281 transitions. [2021-11-23 16:48:08,232 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 281 transitions. Word has length 82 [2021-11-23 16:48:08,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:08,233 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 281 transitions. [2021-11-23 16:48:08,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:08,234 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 281 transitions. [2021-11-23 16:48:08,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-23 16:48:08,235 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:08,235 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] [2021-11-23 16:48:08,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2021-11-23 16:48:08,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:08,450 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:48:08,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:08,452 INFO L85 PathProgramCache]: Analyzing trace with hash 165914305, now seen corresponding path program 1 times [2021-11-23 16:48:08,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:08,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1188511087] [2021-11-23 16:48:08,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:08,454 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:08,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:08,455 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:08,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-23 16:48:08,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:08,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 16:48:08,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:11,274 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 16:48:11,274 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:11,274 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:11,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1188511087] [2021-11-23 16:48:11,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1188511087] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:11,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:11,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-23 16:48:11,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021361782] [2021-11-23 16:48:11,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:11,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 16:48:11,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:11,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 16:48:11,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-23 16:48:11,277 INFO L87 Difference]: Start difference. First operand 226 states and 281 transitions. Second operand has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 14 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:11,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:11,375 INFO L93 Difference]: Finished difference Result 290 states and 381 transitions. [2021-11-23 16:48:11,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 16:48:11,376 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 14 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2021-11-23 16:48:11,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:11,377 INFO L225 Difference]: With dead ends: 290 [2021-11-23 16:48:11,377 INFO L226 Difference]: Without dead ends: 210 [2021-11-23 16:48:11,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 69 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 16:48:11,378 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 63 mSDsluCounter, 1252 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1471 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 264 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:11,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 1471 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 264 Unchecked, 0.0s Time] [2021-11-23 16:48:11,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-23 16:48:11,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 204. [2021-11-23 16:48:11,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 199 states have (on average 1.2814070351758795) internal successors, (255), 203 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:11,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 255 transitions. [2021-11-23 16:48:11,388 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 255 transitions. Word has length 82 [2021-11-23 16:48:11,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:11,388 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 255 transitions. [2021-11-23 16:48:11,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 14 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:11,389 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 255 transitions. [2021-11-23 16:48:11,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-23 16:48:11,390 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:11,390 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] [2021-11-23 16:48:11,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:11,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:11,599 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:48:11,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:11,599 INFO L85 PathProgramCache]: Analyzing trace with hash -2057490532, now seen corresponding path program 1 times [2021-11-23 16:48:11,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:11,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1587455412] [2021-11-23 16:48:11,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:11,600 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:11,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:11,601 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:11,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-23 16:48:11,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:11,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:48:11,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:13,084 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 16:48:13,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:13,084 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:13,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1587455412] [2021-11-23 16:48:13,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1587455412] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:13,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:13,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 16:48:13,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875824446] [2021-11-23 16:48:13,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:13,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 16:48:13,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:13,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 16:48:13,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:48:13,087 INFO L87 Difference]: Start difference. First operand 204 states and 255 transitions. Second operand has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 9 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:13,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:13,142 INFO L93 Difference]: Finished difference Result 268 states and 355 transitions. [2021-11-23 16:48:13,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 16:48:13,142 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 9 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2021-11-23 16:48:13,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:13,144 INFO L225 Difference]: With dead ends: 268 [2021-11-23 16:48:13,144 INFO L226 Difference]: Without dead ends: 171 [2021-11-23 16:48:13,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 74 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 16:48:13,146 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 40 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 1010 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:13,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 1010 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 81 Unchecked, 0.0s Time] [2021-11-23 16:48:13,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-23 16:48:13,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 160. [2021-11-23 16:48:13,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 158 states have (on average 1.2784810126582278) internal successors, (202), 159 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:13,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 202 transitions. [2021-11-23 16:48:13,156 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 202 transitions. Word has length 82 [2021-11-23 16:48:13,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:13,156 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 202 transitions. [2021-11-23 16:48:13,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 9 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:13,157 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 202 transitions. [2021-11-23 16:48:13,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-23 16:48:13,157 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:13,158 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] [2021-11-23 16:48:13,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:13,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:13,373 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:48:13,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:13,373 INFO L85 PathProgramCache]: Analyzing trace with hash 31269841, now seen corresponding path program 1 times [2021-11-23 16:48:13,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:13,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1627845855] [2021-11-23 16:48:13,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:13,374 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:13,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:13,375 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:13,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-23 16:48:13,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:13,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-23 16:48:13,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:42,514 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 16:48:42,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:42,514 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:42,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1627845855] [2021-11-23 16:48:42,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1627845855] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:42,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:42,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-11-23 16:48:42,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280484219] [2021-11-23 16:48:42,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:42,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-23 16:48:42,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:42,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-23 16:48:42,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=760, Unknown=0, NotChecked=0, Total=930 [2021-11-23 16:48:42,516 INFO L87 Difference]: Start difference. First operand 160 states and 202 transitions. Second operand has 31 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:43,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:43,420 INFO L93 Difference]: Finished difference Result 187 states and 234 transitions. [2021-11-23 16:48:43,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-23 16:48:43,421 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2021-11-23 16:48:43,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:43,422 INFO L225 Difference]: With dead ends: 187 [2021-11-23 16:48:43,422 INFO L226 Difference]: Without dead ends: 181 [2021-11-23 16:48:43,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2021-11-23 16:48:43,424 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 78 mSDsluCounter, 2266 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 2421 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 738 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:43,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 2421 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 140 Invalid, 0 Unknown, 738 Unchecked, 0.2s Time] [2021-11-23 16:48:43,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-23 16:48:43,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2021-11-23 16:48:43,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 179 states have (on average 1.2737430167597765) internal successors, (228), 180 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:43,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 228 transitions. [2021-11-23 16:48:43,433 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 228 transitions. Word has length 84 [2021-11-23 16:48:43,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:43,434 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 228 transitions. [2021-11-23 16:48:43,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:43,434 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 228 transitions. [2021-11-23 16:48:43,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-23 16:48:43,434 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:43,434 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 16:48:43,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:43,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:43,635 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:48:43,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:43,637 INFO L85 PathProgramCache]: Analyzing trace with hash -909500381, now seen corresponding path program 1 times [2021-11-23 16:48:43,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:43,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1128423734] [2021-11-23 16:48:43,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:43,638 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:43,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:43,639 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:43,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-23 16:48:43,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:43,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:48:43,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:45,208 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 16:48:45,209 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:45,209 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:45,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1128423734] [2021-11-23 16:48:45,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1128423734] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:45,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:45,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 16:48:45,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806574641] [2021-11-23 16:48:45,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:45,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 16:48:45,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:45,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 16:48:45,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:48:45,211 INFO L87 Difference]: Start difference. First operand 181 states and 228 transitions. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 16:48:45,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:45,276 INFO L93 Difference]: Finished difference Result 181 states and 228 transitions. [2021-11-23 16:48:45,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 16:48:45,277 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 16:48:45,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:45,278 INFO L225 Difference]: With dead ends: 181 [2021-11-23 16:48:45,278 INFO L226 Difference]: Without dead ends: 175 [2021-11-23 16:48:45,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 77 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 16:48:45,279 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 71 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 949 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:45,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 949 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 92 Unchecked, 0.0s Time] [2021-11-23 16:48:45,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-23 16:48:45,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 154. [2021-11-23 16:48:45,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.2810457516339868) internal successors, (196), 153 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:45,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 196 transitions. [2021-11-23 16:48:45,291 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 196 transitions. Word has length 85 [2021-11-23 16:48:45,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:45,291 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 196 transitions. [2021-11-23 16:48:45,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 16:48:45,292 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 196 transitions. [2021-11-23 16:48:45,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-23 16:48:45,293 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:45,293 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] [2021-11-23 16:48:45,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:45,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:45,508 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:48:45,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:45,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1569723451, now seen corresponding path program 1 times [2021-11-23 16:48:45,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:45,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [368763645] [2021-11-23 16:48:45,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:45,509 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:45,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:45,510 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:45,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-23 16:48:45,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:45,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:48:45,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:46,967 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 16:48:46,968 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:46,968 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:46,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [368763645] [2021-11-23 16:48:46,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [368763645] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:46,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:46,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:48:46,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200744512] [2021-11-23 16:48:46,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:46,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:48:46,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:46,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:48:46,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:48:46,970 INFO L87 Difference]: Start difference. First operand 154 states and 196 transitions. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:47,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:47,111 INFO L93 Difference]: Finished difference Result 224 states and 302 transitions. [2021-11-23 16:48:47,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:48:47,112 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 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 111 [2021-11-23 16:48:47,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:47,113 INFO L225 Difference]: With dead ends: 224 [2021-11-23 16:48:47,113 INFO L226 Difference]: Without dead ends: 154 [2021-11-23 16:48:47,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 104 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 16:48:47,114 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 43 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:47,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 655 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 128 Unchecked, 0.1s Time] [2021-11-23 16:48:47,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-23 16:48:47,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2021-11-23 16:48:47,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.2745098039215685) internal successors, (195), 153 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:47,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 195 transitions. [2021-11-23 16:48:47,126 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 195 transitions. Word has length 111 [2021-11-23 16:48:47,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:47,126 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 195 transitions. [2021-11-23 16:48:47,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:47,127 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 195 transitions. [2021-11-23 16:48:47,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-23 16:48:47,128 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:47,128 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:47,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:47,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:47,343 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:48:47,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:47,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1256042154, now seen corresponding path program 1 times [2021-11-23 16:48:47,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:47,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [571801697] [2021-11-23 16:48:47,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:47,344 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:47,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:47,345 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:47,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-23 16:48:47,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:47,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:48:47,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:47,767 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 16:48:47,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:47,768 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:47,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [571801697] [2021-11-23 16:48:47,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [571801697] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:47,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:47,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:48:47,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315914144] [2021-11-23 16:48:47,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:47,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:48:47,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:47,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:48:47,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:47,769 INFO L87 Difference]: Start difference. First operand 154 states and 195 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:47,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:47,795 INFO L93 Difference]: Finished difference Result 274 states and 382 transitions. [2021-11-23 16:48:47,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:48:47,795 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 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 113 [2021-11-23 16:48:47,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:47,797 INFO L225 Difference]: With dead ends: 274 [2021-11-23 16:48:47,797 INFO L226 Difference]: Without dead ends: 210 [2021-11-23 16:48:47,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 111 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 16:48:47,798 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 119 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 383 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 16:48:47,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 383 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:48:47,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-23 16:48:47,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2021-11-23 16:48:47,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.3526570048309179) internal successors, (280), 207 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:47,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 280 transitions. [2021-11-23 16:48:47,808 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 280 transitions. Word has length 113 [2021-11-23 16:48:47,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:47,809 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 280 transitions. [2021-11-23 16:48:47,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:47,809 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 280 transitions. [2021-11-23 16:48:47,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-23 16:48:47,810 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:47,810 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] [2021-11-23 16:48:47,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2021-11-23 16:48:48,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:48,011 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:48:48,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:48,011 INFO L85 PathProgramCache]: Analyzing trace with hash 667510323, now seen corresponding path program 1 times [2021-11-23 16:48:48,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:48,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [981721415] [2021-11-23 16:48:48,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:48,012 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:48,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:48,013 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:48,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-23 16:48:48,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:48,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:48:48,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:48,436 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 16:48:48,436 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:48,436 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:48,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [981721415] [2021-11-23 16:48:48,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [981721415] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:48,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:48,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:48:48,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624881454] [2021-11-23 16:48:48,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:48,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:48:48,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:48,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:48:48,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:48,440 INFO L87 Difference]: Start difference. First operand 208 states and 280 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:48,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:48,481 INFO L93 Difference]: Finished difference Result 428 states and 624 transitions. [2021-11-23 16:48:48,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:48:48,481 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 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 114 [2021-11-23 16:48:48,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:48,484 INFO L225 Difference]: With dead ends: 428 [2021-11-23 16:48:48,484 INFO L226 Difference]: Without dead ends: 310 [2021-11-23 16:48:48,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 112 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 16:48:48,486 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 111 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 383 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 16:48:48,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 383 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:48:48,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-11-23 16:48:48,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 308. [2021-11-23 16:48:48,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.4201954397394136) internal successors, (436), 307 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:48,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 436 transitions. [2021-11-23 16:48:48,505 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 436 transitions. Word has length 114 [2021-11-23 16:48:48,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:48,505 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 436 transitions. [2021-11-23 16:48:48,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:48,506 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 436 transitions. [2021-11-23 16:48:48,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-23 16:48:48,507 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:48,507 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] [2021-11-23 16:48:48,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2021-11-23 16:48:48,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:48,722 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:48:48,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:48,722 INFO L85 PathProgramCache]: Analyzing trace with hash 995038794, now seen corresponding path program 1 times [2021-11-23 16:48:48,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:48,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1540501353] [2021-11-23 16:48:48,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:48,723 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:48,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:48,724 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:48,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-23 16:48:48,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:48,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:48:48,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:49,153 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 16:48:49,154 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:49,154 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:49,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1540501353] [2021-11-23 16:48:49,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1540501353] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:49,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:49,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:48:49,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274681808] [2021-11-23 16:48:49,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:49,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:48:49,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:49,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:48:49,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:49,156 INFO L87 Difference]: Start difference. First operand 308 states and 436 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:49,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:49,185 INFO L93 Difference]: Finished difference Result 712 states and 1066 transitions. [2021-11-23 16:48:49,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:48:49,185 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 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 115 [2021-11-23 16:48:49,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:49,188 INFO L225 Difference]: With dead ends: 712 [2021-11-23 16:48:49,188 INFO L226 Difference]: Without dead ends: 494 [2021-11-23 16:48:49,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 113 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 16:48:49,190 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 103 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 383 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 16:48:49,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 383 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:48:49,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-11-23 16:48:49,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 492. [2021-11-23 16:48:49,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 1.4663951120162932) internal successors, (720), 491 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:49,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 720 transitions. [2021-11-23 16:48:49,213 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 720 transitions. Word has length 115 [2021-11-23 16:48:49,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:49,213 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 720 transitions. [2021-11-23 16:48:49,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:49,214 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 720 transitions. [2021-11-23 16:48:49,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-23 16:48:49,215 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:49,215 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] [2021-11-23 16:48:49,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:49,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:49,430 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:48:49,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:49,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1965286297, now seen corresponding path program 1 times [2021-11-23 16:48:49,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:49,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [50233476] [2021-11-23 16:48:49,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:49,432 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:49,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:49,433 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:49,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-23 16:48:49,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:49,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:48:49,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:49,880 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 16:48:49,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:49,881 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:49,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [50233476] [2021-11-23 16:48:49,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [50233476] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:49,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:49,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:48:49,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213006970] [2021-11-23 16:48:49,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:49,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:48:49,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:49,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:48:49,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:49,882 INFO L87 Difference]: Start difference. First operand 492 states and 720 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:49,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:49,918 INFO L93 Difference]: Finished difference Result 1232 states and 1866 transitions. [2021-11-23 16:48:49,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:48:49,919 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2021-11-23 16:48:49,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:49,923 INFO L225 Difference]: With dead ends: 1232 [2021-11-23 16:48:49,924 INFO L226 Difference]: Without dead ends: 830 [2021-11-23 16:48:49,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 114 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 16:48:49,925 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 95 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 383 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 16:48:49,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 383 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:48:49,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-11-23 16:48:49,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 828. [2021-11-23 16:48:49,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 827 states have (on average 1.4897218863361548) internal successors, (1232), 827 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:49,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1232 transitions. [2021-11-23 16:48:49,953 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1232 transitions. Word has length 116 [2021-11-23 16:48:49,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:49,953 INFO L470 AbstractCegarLoop]: Abstraction has 828 states and 1232 transitions. [2021-11-23 16:48:49,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:49,953 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1232 transitions. [2021-11-23 16:48:49,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-23 16:48:49,954 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:49,954 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] [2021-11-23 16:48:49,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:50,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:50,155 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:48:50,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:50,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1905530686, now seen corresponding path program 1 times [2021-11-23 16:48:50,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:50,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [753392976] [2021-11-23 16:48:50,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:50,156 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:50,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:50,157 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:50,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-23 16:48:50,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:50,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:48:50,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:52,155 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 16:48:52,155 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:52,155 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:52,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [753392976] [2021-11-23 16:48:52,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [753392976] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:52,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:52,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:48:52,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950740198] [2021-11-23 16:48:52,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:52,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 16:48:52,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:52,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 16:48:52,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:48:52,157 INFO L87 Difference]: Start difference. First operand 828 states and 1232 transitions. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:52,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:52,590 INFO L93 Difference]: Finished difference Result 5256 states and 8054 transitions. [2021-11-23 16:48:52,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 16:48:52,591 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 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 117 [2021-11-23 16:48:52,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:52,620 INFO L225 Difference]: With dead ends: 5256 [2021-11-23 16:48:52,620 INFO L226 Difference]: Without dead ends: 4518 [2021-11-23 16:48:52,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:48:52,624 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 973 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 973 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:52,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [973 Valid, 769 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 16:48:52,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4518 states. [2021-11-23 16:48:52,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4518 to 2300. [2021-11-23 16:48:52,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2300 states, 2299 states have (on average 1.5032622879512831) internal successors, (3456), 2299 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:52,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2300 states to 2300 states and 3456 transitions. [2021-11-23 16:48:52,793 INFO L78 Accepts]: Start accepts. Automaton has 2300 states and 3456 transitions. Word has length 117 [2021-11-23 16:48:52,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:52,794 INFO L470 AbstractCegarLoop]: Abstraction has 2300 states and 3456 transitions. [2021-11-23 16:48:52,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:52,794 INFO L276 IsEmpty]: Start isEmpty. Operand 2300 states and 3456 transitions. [2021-11-23 16:48:52,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-23 16:48:52,795 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:52,796 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] [2021-11-23 16:48:52,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:53,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:53,011 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:48:53,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:53,011 INFO L85 PathProgramCache]: Analyzing trace with hash -927237586, now seen corresponding path program 1 times [2021-11-23 16:48:53,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:53,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [102762614] [2021-11-23 16:48:53,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:53,012 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:53,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:53,014 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:53,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-23 16:48:53,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:53,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:48:53,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:53,775 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 16:48:53,775 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:53,775 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:53,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [102762614] [2021-11-23 16:48:53,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [102762614] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:53,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:53,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:48:53,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392465521] [2021-11-23 16:48:53,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:53,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:48:53,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:53,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:48:53,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:48:53,777 INFO L87 Difference]: Start difference. First operand 2300 states and 3456 transitions. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:53,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:53,893 INFO L93 Difference]: Finished difference Result 4545 states and 6865 transitions. [2021-11-23 16:48:53,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:48:53,894 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 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 119 [2021-11-23 16:48:53,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:53,910 INFO L225 Difference]: With dead ends: 4545 [2021-11-23 16:48:53,910 INFO L226 Difference]: Without dead ends: 2335 [2021-11-23 16:48:53,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 116 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 16:48:53,915 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 26 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 460 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 16:48:53,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 460 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2021-11-23 16:48:53,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-11-23 16:48:54,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 2334. [2021-11-23 16:48:54,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2334 states, 2333 states have (on average 1.5006429489927133) internal successors, (3501), 2333 states have internal predecessors, (3501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:54,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2334 states to 2334 states and 3501 transitions. [2021-11-23 16:48:54,032 INFO L78 Accepts]: Start accepts. Automaton has 2334 states and 3501 transitions. Word has length 119 [2021-11-23 16:48:54,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:54,032 INFO L470 AbstractCegarLoop]: Abstraction has 2334 states and 3501 transitions. [2021-11-23 16:48:54,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:54,032 INFO L276 IsEmpty]: Start isEmpty. Operand 2334 states and 3501 transitions. [2021-11-23 16:48:54,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-23 16:48:54,033 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:54,034 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] [2021-11-23 16:48:54,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (48)] Ended with exit code 0 [2021-11-23 16:48:54,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:54,243 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:48:54,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:54,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1361437533, now seen corresponding path program 1 times [2021-11-23 16:48:54,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:54,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [249820052] [2021-11-23 16:48:54,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:54,245 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:54,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:54,246 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:54,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-11-23 16:48:54,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:54,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:48:54,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:54,835 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 16:48:54,835 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:54,835 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:54,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [249820052] [2021-11-23 16:48:54,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [249820052] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:54,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:54,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:48:54,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824130986] [2021-11-23 16:48:54,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:54,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:48:54,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:54,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:48:54,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:48:54,839 INFO L87 Difference]: Start difference. First operand 2334 states and 3501 transitions. Second operand has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:55,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:55,316 INFO L93 Difference]: Finished difference Result 4809 states and 7154 transitions. [2021-11-23 16:48:55,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 16:48:55,317 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 0 states have call successors, (0), 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 120 [2021-11-23 16:48:55,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:55,365 INFO L225 Difference]: With dead ends: 4809 [2021-11-23 16:48:55,365 INFO L226 Difference]: Without dead ends: 4807 [2021-11-23 16:48:55,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 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 16:48:55,371 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 322 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 789 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 16:48:55,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 789 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:48:55,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4807 states. [2021-11-23 16:48:55,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4807 to 2478. [2021-11-23 16:48:55,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 1.4715381509890997) internal successors, (3645), 2477 states have internal predecessors, (3645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:55,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 3645 transitions. [2021-11-23 16:48:55,662 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 3645 transitions. Word has length 120 [2021-11-23 16:48:55,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:55,662 INFO L470 AbstractCegarLoop]: Abstraction has 2478 states and 3645 transitions. [2021-11-23 16:48:55,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:55,663 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 3645 transitions. [2021-11-23 16:48:55,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-23 16:48:55,664 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:55,664 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] [2021-11-23 16:48:55,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:55,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:55,877 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:48:55,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:55,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1741921215, now seen corresponding path program 1 times [2021-11-23 16:48:55,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:55,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1366018279] [2021-11-23 16:48:55,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:55,878 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:55,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:55,879 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:55,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-11-23 16:48:56,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:56,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:48:56,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:56,334 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 16:48:56,335 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:56,335 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:56,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1366018279] [2021-11-23 16:48:56,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1366018279] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:56,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:56,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:48:56,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885312694] [2021-11-23 16:48:56,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:56,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:48:56,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:56,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:48:56,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:56,337 INFO L87 Difference]: Start difference. First operand 2478 states and 3645 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:56,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:56,728 INFO L93 Difference]: Finished difference Result 6706 states and 9887 transitions. [2021-11-23 16:48:56,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:48:56,729 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 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 120 [2021-11-23 16:48:56,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:56,741 INFO L225 Difference]: With dead ends: 6706 [2021-11-23 16:48:56,742 INFO L226 Difference]: Without dead ends: 4352 [2021-11-23 16:48:56,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 118 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 16:48:56,747 INFO L933 BasicCegarLoop]: 274 mSDtfsCounter, 124 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 391 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 16:48:56,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 391 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:48:56,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4352 states. [2021-11-23 16:48:57,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4352 to 4350. [2021-11-23 16:48:57,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4350 states, 4349 states have (on average 1.4559668889399862) internal successors, (6332), 4349 states have internal predecessors, (6332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:57,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4350 states to 4350 states and 6332 transitions. [2021-11-23 16:48:57,100 INFO L78 Accepts]: Start accepts. Automaton has 4350 states and 6332 transitions. Word has length 120 [2021-11-23 16:48:57,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:57,101 INFO L470 AbstractCegarLoop]: Abstraction has 4350 states and 6332 transitions. [2021-11-23 16:48:57,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:57,101 INFO L276 IsEmpty]: Start isEmpty. Operand 4350 states and 6332 transitions. [2021-11-23 16:48:57,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-23 16:48:57,102 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:57,103 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] [2021-11-23 16:48:57,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:57,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:57,317 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:48:57,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:57,318 INFO L85 PathProgramCache]: Analyzing trace with hash 761465485, now seen corresponding path program 1 times [2021-11-23 16:48:57,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:57,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [179556649] [2021-11-23 16:48:57,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:57,319 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:57,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:57,321 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:57,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-11-23 16:48:57,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:57,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:48:57,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:58,191 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 16:48:58,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:58,192 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:58,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [179556649] [2021-11-23 16:48:58,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [179556649] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:58,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:58,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:48:58,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871518717] [2021-11-23 16:48:58,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:58,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:48:58,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:58,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:48:58,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:48:58,195 INFO L87 Difference]: Start difference. First operand 4350 states and 6332 transitions. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:58,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:58,527 INFO L93 Difference]: Finished difference Result 8578 states and 12528 transitions. [2021-11-23 16:48:58,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:48:58,527 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 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 121 [2021-11-23 16:48:58,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:58,535 INFO L225 Difference]: With dead ends: 8578 [2021-11-23 16:48:58,535 INFO L226 Difference]: Without dead ends: 4352 [2021-11-23 16:48:58,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 118 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 16:48:58,541 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 25 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 461 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 16:48:58,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 461 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2021-11-23 16:48:58,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4352 states. [2021-11-23 16:48:58,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4352 to 4352. [2021-11-23 16:48:58,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4352 states, 4351 states have (on average 1.4557572971730637) internal successors, (6334), 4351 states have internal predecessors, (6334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:58,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4352 states to 4352 states and 6334 transitions. [2021-11-23 16:48:58,860 INFO L78 Accepts]: Start accepts. Automaton has 4352 states and 6334 transitions. Word has length 121 [2021-11-23 16:48:58,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:58,860 INFO L470 AbstractCegarLoop]: Abstraction has 4352 states and 6334 transitions. [2021-11-23 16:48:58,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:58,861 INFO L276 IsEmpty]: Start isEmpty. Operand 4352 states and 6334 transitions. [2021-11-23 16:48:58,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-23 16:48:58,865 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:58,866 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:48:58,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:59,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:59,082 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:48:59,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:59,083 INFO L85 PathProgramCache]: Analyzing trace with hash 101182740, now seen corresponding path program 1 times [2021-11-23 16:48:59,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:59,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1539447108] [2021-11-23 16:48:59,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:59,084 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:59,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:59,086 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:59,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-11-23 16:48:59,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:59,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:48:59,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:59,776 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:59,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:59,777 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:59,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1539447108] [2021-11-23 16:48:59,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1539447108] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:59,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:59,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:48:59,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298189851] [2021-11-23 16:48:59,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:59,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:48:59,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:59,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:48:59,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:59,779 INFO L87 Difference]: Start difference. First operand 4352 states and 6334 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:00,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:00,206 INFO L93 Difference]: Finished difference Result 8580 states and 12528 transitions. [2021-11-23 16:49:00,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:49:00,207 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 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 149 [2021-11-23 16:49:00,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:00,220 INFO L225 Difference]: With dead ends: 8580 [2021-11-23 16:49:00,221 INFO L226 Difference]: Without dead ends: 4354 [2021-11-23 16:49:00,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 147 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 16:49:00,228 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 85 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 387 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 16:49:00,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 387 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:49:00,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4354 states. [2021-11-23 16:49:00,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4354 to 4352. [2021-11-23 16:49:00,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4352 states, 4351 states have (on average 1.4447253504941393) internal successors, (6286), 4351 states have internal predecessors, (6286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:00,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4352 states to 4352 states and 6286 transitions. [2021-11-23 16:49:00,600 INFO L78 Accepts]: Start accepts. Automaton has 4352 states and 6286 transitions. Word has length 149 [2021-11-23 16:49:00,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:00,600 INFO L470 AbstractCegarLoop]: Abstraction has 4352 states and 6286 transitions. [2021-11-23 16:49:00,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:00,601 INFO L276 IsEmpty]: Start isEmpty. Operand 4352 states and 6286 transitions. [2021-11-23 16:49:00,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-23 16:49:00,603 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:00,604 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:49:00,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:00,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:00,818 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:49:00,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:00,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1345709682, now seen corresponding path program 1 times [2021-11-23 16:49:00,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:00,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1473756446] [2021-11-23 16:49:00,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:00,820 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:00,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:00,821 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:00,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2021-11-23 16:49:01,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:01,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:49:01,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:01,708 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 16:49:01,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:01,709 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:01,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1473756446] [2021-11-23 16:49:01,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1473756446] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:01,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:01,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:49:01,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654154742] [2021-11-23 16:49:01,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:01,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:49:01,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:01,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:49:01,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:49:01,711 INFO L87 Difference]: Start difference. First operand 4352 states and 6286 transitions. Second operand has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:01,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:01,987 INFO L93 Difference]: Finished difference Result 8584 states and 12438 transitions. [2021-11-23 16:49:01,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:49:01,988 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 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 150 [2021-11-23 16:49:01,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:01,999 INFO L225 Difference]: With dead ends: 8584 [2021-11-23 16:49:01,999 INFO L226 Difference]: Without dead ends: 4358 [2021-11-23 16:49:02,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 147 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 16:49:02,008 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 25 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 460 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 16:49:02,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 460 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2021-11-23 16:49:02,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4358 states. [2021-11-23 16:49:02,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4358 to 4358. [2021-11-23 16:49:02,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4358 states, 4357 states have (on average 1.444112921735139) internal successors, (6292), 4357 states have internal predecessors, (6292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:02,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4358 states to 4358 states and 6292 transitions. [2021-11-23 16:49:02,495 INFO L78 Accepts]: Start accepts. Automaton has 4358 states and 6292 transitions. Word has length 150 [2021-11-23 16:49:02,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:02,496 INFO L470 AbstractCegarLoop]: Abstraction has 4358 states and 6292 transitions. [2021-11-23 16:49:02,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:02,497 INFO L276 IsEmpty]: Start isEmpty. Operand 4358 states and 6292 transitions. [2021-11-23 16:49:02,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-23 16:49:02,499 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:02,500 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:49:02,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (53)] Ended with exit code 0 [2021-11-23 16:49:02,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:02,715 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:49:02,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:02,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1563054220, now seen corresponding path program 1 times [2021-11-23 16:49:02,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:02,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1289593761] [2021-11-23 16:49:02,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:02,716 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:02,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:02,717 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:02,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-11-23 16:49:02,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:02,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 16:49:02,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:05,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:05,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:49:06,543 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:06,543 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:06,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1289593761] [2021-11-23 16:49:06,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1289593761] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:49:06,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [589717628] [2021-11-23 16:49:06,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:06,544 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:49:06,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:49:06,550 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:49:06,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2021-11-23 16:49:07,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:07,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 16:49:07,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:09,544 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:09,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:49:10,302 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:10,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [589717628] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:49:10,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707851239] [2021-11-23 16:49:10,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:10,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:49:10,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:49:10,304 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:49:10,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-23 16:49:10,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:10,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:49:10,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:12,456 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:12,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:49:13,691 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:13,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707851239] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:49:13,692 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:49:13,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 8, 8] total 31 [2021-11-23 16:49:13,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474513943] [2021-11-23 16:49:13,693 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:49:13,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-23 16:49:13,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:13,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-23 16:49:13,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2021-11-23 16:49:13,697 INFO L87 Difference]: Start difference. First operand 4358 states and 6292 transitions. Second operand has 32 states, 32 states have (on average 14.40625) internal successors, (461), 31 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:14,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:14,405 INFO L93 Difference]: Finished difference Result 8630 states and 12494 transitions. [2021-11-23 16:49:14,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 16:49:14,406 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 14.40625) internal successors, (461), 31 states have internal predecessors, (461), 0 states have call successors, (0), 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 150 [2021-11-23 16:49:14,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:14,416 INFO L225 Difference]: With dead ends: 8630 [2021-11-23 16:49:14,417 INFO L226 Difference]: Without dead ends: 4404 [2021-11-23 16:49:14,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 906 GetRequests, 867 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=226, Invalid=1414, Unknown=0, NotChecked=0, Total=1640 [2021-11-23 16:49:14,423 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 204 mSDsluCounter, 1677 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 1808 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:14,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 1808 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 68 Invalid, 0 Unknown, 147 Unchecked, 0.1s Time] [2021-11-23 16:49:14,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4404 states. [2021-11-23 16:49:14,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4404 to 4404. [2021-11-23 16:49:14,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4404 states, 4403 states have (on average 1.441744265273677) internal successors, (6348), 4403 states have internal predecessors, (6348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:14,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4404 states to 4404 states and 6348 transitions. [2021-11-23 16:49:14,820 INFO L78 Accepts]: Start accepts. Automaton has 4404 states and 6348 transitions. Word has length 150 [2021-11-23 16:49:14,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:14,820 INFO L470 AbstractCegarLoop]: Abstraction has 4404 states and 6348 transitions. [2021-11-23 16:49:14,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 14.40625) internal successors, (461), 31 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:14,821 INFO L276 IsEmpty]: Start isEmpty. Operand 4404 states and 6348 transitions. [2021-11-23 16:49:14,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-23 16:49:14,823 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:14,824 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:49:14,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:15,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (54)] Ended with exit code 0 [2021-11-23 16:49:15,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (55)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:15,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:49:15,443 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:49:15,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:15,444 INFO L85 PathProgramCache]: Analyzing trace with hash -947800204, now seen corresponding path program 1 times [2021-11-23 16:49:15,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:15,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1087261173] [2021-11-23 16:49:15,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:15,445 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:15,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:15,446 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:15,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2021-11-23 16:49:15,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:15,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 16:49:15,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:18,307 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:18,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:49:19,254 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:19,255 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:19,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1087261173] [2021-11-23 16:49:19,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1087261173] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:49:19,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1251520015] [2021-11-23 16:49:19,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:19,256 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:49:19,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:49:19,258 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:49:19,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2021-11-23 16:49:19,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:19,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 16:49:19,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:22,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:22,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:49:22,927 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:22,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1251520015] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:49:22,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683279910] [2021-11-23 16:49:22,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:22,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:49:22,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:49:22,935 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:49:22,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-23 16:49:23,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:23,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:49:23,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:25,751 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:25,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:49:26,561 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:26,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683279910] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:49:26,561 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:49:26,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 8, 8] total 29 [2021-11-23 16:49:26,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167338152] [2021-11-23 16:49:26,562 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:49:26,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-23 16:49:26,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:26,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-23 16:49:26,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2021-11-23 16:49:26,565 INFO L87 Difference]: Start difference. First operand 4404 states and 6348 transitions. Second operand has 30 states, 30 states have (on average 15.5) internal successors, (465), 29 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:27,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:27,441 INFO L93 Difference]: Finished difference Result 8856 states and 12754 transitions. [2021-11-23 16:49:27,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 16:49:27,442 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 15.5) internal successors, (465), 29 states have internal predecessors, (465), 0 states have call successors, (0), 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 150 [2021-11-23 16:49:27,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:27,456 INFO L225 Difference]: With dead ends: 8856 [2021-11-23 16:49:27,456 INFO L226 Difference]: Without dead ends: 4630 [2021-11-23 16:49:27,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 906 GetRequests, 870 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=209, Invalid=1197, Unknown=0, NotChecked=0, Total=1406 [2021-11-23 16:49:27,464 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 226 mSDsluCounter, 1754 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 1884 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 242 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:27,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 1884 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 108 Invalid, 0 Unknown, 242 Unchecked, 0.1s Time] [2021-11-23 16:49:27,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4630 states. [2021-11-23 16:49:27,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4630 to 4530. [2021-11-23 16:49:27,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4530 states, 4529 states have (on average 1.4358578052550233) internal successors, (6503), 4529 states have internal predecessors, (6503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:27,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4530 states to 4530 states and 6503 transitions. [2021-11-23 16:49:27,895 INFO L78 Accepts]: Start accepts. Automaton has 4530 states and 6503 transitions. Word has length 150 [2021-11-23 16:49:27,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:27,895 INFO L470 AbstractCegarLoop]: Abstraction has 4530 states and 6503 transitions. [2021-11-23 16:49:27,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 15.5) internal successors, (465), 29 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:27,896 INFO L276 IsEmpty]: Start isEmpty. Operand 4530 states and 6503 transitions. [2021-11-23 16:49:27,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-23 16:49:27,899 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:27,900 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:49:27,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:28,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (58)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:28,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (57)] Ended with exit code 0 [2021-11-23 16:49:28,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:28,517 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:49:28,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:28,517 INFO L85 PathProgramCache]: Analyzing trace with hash 335476085, now seen corresponding path program 1 times [2021-11-23 16:49:28,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:28,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1529730209] [2021-11-23 16:49:28,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:28,518 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:28,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:28,519 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:28,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2021-11-23 16:49:28,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:28,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:49:28,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:30,688 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 16:49:30,688 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:30,689 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:30,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1529730209] [2021-11-23 16:49:30,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1529730209] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:30,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:30,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 16:49:30,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806846439] [2021-11-23 16:49:30,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:30,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 16:49:30,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:30,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 16:49:30,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:49:30,691 INFO L87 Difference]: Start difference. First operand 4530 states and 6503 transitions. Second operand has 9 states, 9 states have (on average 16.22222222222222) internal successors, (146), 8 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:31,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:31,069 INFO L93 Difference]: Finished difference Result 8770 states and 12662 transitions. [2021-11-23 16:49:31,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 16:49:31,070 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 16.22222222222222) internal successors, (146), 8 states have internal predecessors, (146), 0 states have call successors, (0), 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 150 [2021-11-23 16:49:31,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:31,078 INFO L225 Difference]: With dead ends: 8770 [2021-11-23 16:49:31,079 INFO L226 Difference]: Without dead ends: 4530 [2021-11-23 16:49:31,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 142 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 16:49:31,085 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 54 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:31,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 801 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 153 Unchecked, 0.1s Time] [2021-11-23 16:49:31,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4530 states. [2021-11-23 16:49:31,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4530 to 4530. [2021-11-23 16:49:31,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4530 states, 4529 states have (on average 1.4354162066681386) internal successors, (6501), 4529 states have internal predecessors, (6501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:31,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4530 states to 4530 states and 6501 transitions. [2021-11-23 16:49:31,516 INFO L78 Accepts]: Start accepts. Automaton has 4530 states and 6501 transitions. Word has length 150 [2021-11-23 16:49:31,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:31,517 INFO L470 AbstractCegarLoop]: Abstraction has 4530 states and 6501 transitions. [2021-11-23 16:49:31,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.22222222222222) internal successors, (146), 8 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:31,517 INFO L276 IsEmpty]: Start isEmpty. Operand 4530 states and 6501 transitions. [2021-11-23 16:49:31,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-23 16:49:31,521 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:31,521 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:49:31,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:31,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:31,737 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:49:31,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:31,738 INFO L85 PathProgramCache]: Analyzing trace with hash -130219501, now seen corresponding path program 1 times [2021-11-23 16:49:31,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:31,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1359710417] [2021-11-23 16:49:31,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:31,739 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:31,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:31,741 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:31,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2021-11-23 16:49:32,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:32,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:49:32,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:33,880 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 16:49:33,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:33,880 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:33,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1359710417] [2021-11-23 16:49:33,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1359710417] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:33,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:33,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 16:49:33,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15864357] [2021-11-23 16:49:33,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:33,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 16:49:33,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:33,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 16:49:33,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:49:33,883 INFO L87 Difference]: Start difference. First operand 4530 states and 6501 transitions. Second operand has 9 states, 9 states have (on average 16.11111111111111) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:34,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:34,218 INFO L93 Difference]: Finished difference Result 8888 states and 12810 transitions. [2021-11-23 16:49:34,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 16:49:34,218 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 16.11111111111111) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 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 150 [2021-11-23 16:49:34,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:34,225 INFO L225 Difference]: With dead ends: 8888 [2021-11-23 16:49:34,225 INFO L226 Difference]: Without dead ends: 4642 [2021-11-23 16:49:34,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 142 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 16:49:34,232 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 68 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:34,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 650 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 94 Unchecked, 0.1s Time] [2021-11-23 16:49:34,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4642 states. [2021-11-23 16:49:34,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4642 to 4642. [2021-11-23 16:49:34,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4642 states, 4641 states have (on average 1.4305106658047835) internal successors, (6639), 4641 states have internal predecessors, (6639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:34,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4642 states to 4642 states and 6639 transitions. [2021-11-23 16:49:34,690 INFO L78 Accepts]: Start accepts. Automaton has 4642 states and 6639 transitions. Word has length 150 [2021-11-23 16:49:34,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:34,691 INFO L470 AbstractCegarLoop]: Abstraction has 4642 states and 6639 transitions. [2021-11-23 16:49:34,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.11111111111111) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:34,691 INFO L276 IsEmpty]: Start isEmpty. Operand 4642 states and 6639 transitions. [2021-11-23 16:49:34,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-23 16:49:34,694 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:34,694 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:49:34,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (61)] Ended with exit code 0 [2021-11-23 16:49:34,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:34,895 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:49:34,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:34,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1836832715, now seen corresponding path program 1 times [2021-11-23 16:49:34,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:34,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1864088790] [2021-11-23 16:49:34,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:34,897 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:34,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:34,899 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:34,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2021-11-23 16:49:35,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:35,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:49:35,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:36,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 16:49:36,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:36,985 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:36,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1864088790] [2021-11-23 16:49:36,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1864088790] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:36,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:36,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 16:49:36,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154762781] [2021-11-23 16:49:36,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:36,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 16:49:36,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:36,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 16:49:36,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:49:36,987 INFO L87 Difference]: Start difference. First operand 4642 states and 6639 transitions. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 8 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 16:49:37,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:37,355 INFO L93 Difference]: Finished difference Result 9090 states and 13056 transitions. [2021-11-23 16:49:37,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 16:49:37,356 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 8 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 150 [2021-11-23 16:49:37,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:37,362 INFO L225 Difference]: With dead ends: 9090 [2021-11-23 16:49:37,362 INFO L226 Difference]: Without dead ends: 4838 [2021-11-23 16:49:37,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 142 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 16:49:37,368 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 80 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:37,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 614 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 93 Unchecked, 0.0s Time] [2021-11-23 16:49:37,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4838 states. [2021-11-23 16:49:37,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4838 to 4838. [2021-11-23 16:49:37,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4838 states, 4837 states have (on average 1.4209220591275584) internal successors, (6873), 4837 states have internal predecessors, (6873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:37,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4838 states to 4838 states and 6873 transitions. [2021-11-23 16:49:37,671 INFO L78 Accepts]: Start accepts. Automaton has 4838 states and 6873 transitions. Word has length 150 [2021-11-23 16:49:37,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:37,672 INFO L470 AbstractCegarLoop]: Abstraction has 4838 states and 6873 transitions. [2021-11-23 16:49:37,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 8 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 16:49:37,672 INFO L276 IsEmpty]: Start isEmpty. Operand 4838 states and 6873 transitions. [2021-11-23 16:49:37,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-23 16:49:37,674 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:37,675 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:49:37,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (62)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:37,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:37,877 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:49:37,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:37,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1590265683, now seen corresponding path program 1 times [2021-11-23 16:49:37,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:37,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [752976318] [2021-11-23 16:49:37,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:37,879 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:37,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:37,880 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:37,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2021-11-23 16:49:38,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:38,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:49:38,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:39,812 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 16:49:39,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:39,812 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:39,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [752976318] [2021-11-23 16:49:39,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [752976318] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:39,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:39,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 16:49:39,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922642140] [2021-11-23 16:49:39,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:39,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 16:49:39,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:39,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 16:49:39,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:49:39,814 INFO L87 Difference]: Start difference. First operand 4838 states and 6873 transitions. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 8 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 16:49:40,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:40,206 INFO L93 Difference]: Finished difference Result 9420 states and 13442 transitions. [2021-11-23 16:49:40,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 16:49:40,207 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 8 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 150 [2021-11-23 16:49:40,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:40,213 INFO L225 Difference]: With dead ends: 9420 [2021-11-23 16:49:40,214 INFO L226 Difference]: Without dead ends: 5162 [2021-11-23 16:49:40,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 142 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 16:49:40,220 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 90 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:40,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 532 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 58 Unchecked, 0.0s Time] [2021-11-23 16:49:40,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5162 states. [2021-11-23 16:49:40,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5162 to 5162. [2021-11-23 16:49:40,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5162 states, 5161 states have (on average 1.40341019182329) internal successors, (7243), 5161 states have internal predecessors, (7243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:40,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5162 states to 5162 states and 7243 transitions. [2021-11-23 16:49:40,606 INFO L78 Accepts]: Start accepts. Automaton has 5162 states and 7243 transitions. Word has length 150 [2021-11-23 16:49:40,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:40,607 INFO L470 AbstractCegarLoop]: Abstraction has 5162 states and 7243 transitions. [2021-11-23 16:49:40,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 8 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 16:49:40,607 INFO L276 IsEmpty]: Start isEmpty. Operand 5162 states and 7243 transitions. [2021-11-23 16:49:40,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-23 16:49:40,610 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:40,610 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:49:40,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:40,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:40,811 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:49:40,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:40,812 INFO L85 PathProgramCache]: Analyzing trace with hash -986125579, now seen corresponding path program 1 times [2021-11-23 16:49:40,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:40,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1638632234] [2021-11-23 16:49:40,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:40,813 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:40,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:40,814 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:40,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2021-11-23 16:49:41,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:41,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:49:41,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:42,393 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 16:49:42,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:42,393 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:42,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1638632234] [2021-11-23 16:49:42,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1638632234] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:42,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:42,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:49:42,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188890306] [2021-11-23 16:49:42,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:42,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:49:42,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:42,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:49:42,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:49:42,395 INFO L87 Difference]: Start difference. First operand 5162 states and 7243 transitions. Second operand has 8 states, 8 states have (on average 17.75) internal successors, (142), 7 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 16:49:42,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:42,909 INFO L93 Difference]: Finished difference Result 9426 states and 13434 transitions. [2021-11-23 16:49:42,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:49:42,910 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.75) internal successors, (142), 7 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 150 [2021-11-23 16:49:42,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:42,920 INFO L225 Difference]: With dead ends: 9426 [2021-11-23 16:49:42,920 INFO L226 Difference]: Without dead ends: 5162 [2021-11-23 16:49:42,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 143 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 16:49:42,928 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 46 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:42,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 809 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 210 Unchecked, 0.1s Time] [2021-11-23 16:49:42,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5162 states. [2021-11-23 16:49:43,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5162 to 5162. [2021-11-23 16:49:43,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5162 states, 5161 states have (on average 1.4003100174384808) internal successors, (7227), 5161 states have internal predecessors, (7227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:43,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5162 states to 5162 states and 7227 transitions. [2021-11-23 16:49:43,282 INFO L78 Accepts]: Start accepts. Automaton has 5162 states and 7227 transitions. Word has length 150 [2021-11-23 16:49:43,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:43,282 INFO L470 AbstractCegarLoop]: Abstraction has 5162 states and 7227 transitions. [2021-11-23 16:49:43,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.75) internal successors, (142), 7 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 16:49:43,282 INFO L276 IsEmpty]: Start isEmpty. Operand 5162 states and 7227 transitions. [2021-11-23 16:49:43,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-23 16:49:43,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:43,286 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:49:43,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:43,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:43,487 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:49:43,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:43,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1418263724, now seen corresponding path program 1 times [2021-11-23 16:49:43,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:43,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1162864214] [2021-11-23 16:49:43,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:43,490 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:43,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:43,496 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:43,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2021-11-23 16:49:43,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:43,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 16:49:43,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:46,542 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:46,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:49:47,219 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:47,219 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:47,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1162864214] [2021-11-23 16:49:47,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1162864214] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:49:47,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [146609240] [2021-11-23 16:49:47,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:47,221 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:49:47,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:49:47,222 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:49:47,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (66)] Waiting until timeout for monitored process [2021-11-23 16:49:47,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:47,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 16:49:47,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:50,952 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:50,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:49:51,425 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:51,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [146609240] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:49:51,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760992075] [2021-11-23 16:49:51,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:51,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:49:51,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:49:51,426 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:49:51,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-11-23 16:49:51,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:51,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:49:51,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:54,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:54,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:49:55,016 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:55,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760992075] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:49:55,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:49:55,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 8, 8] total 31 [2021-11-23 16:49:55,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389524546] [2021-11-23 16:49:55,018 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:49:55,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-23 16:49:55,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:55,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-23 16:49:55,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2021-11-23 16:49:55,020 INFO L87 Difference]: Start difference. First operand 5162 states and 7227 transitions. Second operand has 32 states, 32 states have (on average 15.03125) internal successors, (481), 31 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:55,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:55,950 INFO L93 Difference]: Finished difference Result 9724 states and 13778 transitions. [2021-11-23 16:49:55,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 16:49:55,951 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 15.03125) internal successors, (481), 31 states have internal predecessors, (481), 0 states have call successors, (0), 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 151 [2021-11-23 16:49:55,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:55,963 INFO L225 Difference]: With dead ends: 9724 [2021-11-23 16:49:55,963 INFO L226 Difference]: Without dead ends: 5498 [2021-11-23 16:49:55,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 913 GetRequests, 874 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=227, Invalid=1413, Unknown=0, NotChecked=0, Total=1640 [2021-11-23 16:49:55,970 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 220 mSDsluCounter, 1531 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 1664 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:55,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 1664 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 130 Invalid, 0 Unknown, 177 Unchecked, 0.1s Time] [2021-11-23 16:49:55,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5498 states. [2021-11-23 16:49:56,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5498 to 5398. [2021-11-23 16:49:56,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5398 states, 5397 states have (on average 1.394663702056698) internal successors, (7527), 5397 states have internal predecessors, (7527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:56,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5398 states to 5398 states and 7527 transitions. [2021-11-23 16:49:56,401 INFO L78 Accepts]: Start accepts. Automaton has 5398 states and 7527 transitions. Word has length 151 [2021-11-23 16:49:56,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:56,402 INFO L470 AbstractCegarLoop]: Abstraction has 5398 states and 7527 transitions. [2021-11-23 16:49:56,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 15.03125) internal successors, (481), 31 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:56,402 INFO L276 IsEmpty]: Start isEmpty. Operand 5398 states and 7527 transitions. [2021-11-23 16:49:56,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-23 16:49:56,405 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:56,406 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:49:56,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (66)] Ended with exit code 0 [2021-11-23 16:49:56,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-11-23 16:49:56,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (65)] Ended with exit code 0 [2021-11-23 16:49:57,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:57,007 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:49:57,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:57,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1633076181, now seen corresponding path program 1 times [2021-11-23 16:49:57,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:57,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [450575361] [2021-11-23 16:49:57,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:57,009 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:57,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:57,010 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:57,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2021-11-23 16:49:57,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:57,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:49:57,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:57,537 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:57,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:57,537 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:57,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [450575361] [2021-11-23 16:49:57,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [450575361] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:57,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:57,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:49:57,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370522506] [2021-11-23 16:49:57,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:57,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:49:57,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:57,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:49:57,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:49:57,539 INFO L87 Difference]: Start difference. First operand 5398 states and 7527 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:57,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:57,862 INFO L93 Difference]: Finished difference Result 7514 states and 10601 transitions. [2021-11-23 16:49:57,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:49:57,863 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 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 151 [2021-11-23 16:49:57,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:57,867 INFO L225 Difference]: With dead ends: 7514 [2021-11-23 16:49:57,867 INFO L226 Difference]: Without dead ends: 3288 [2021-11-23 16:49:57,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 149 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 16:49:57,872 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 79 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 368 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 16:49:57,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 368 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:49:57,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3288 states. [2021-11-23 16:49:58,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3288 to 3286. [2021-11-23 16:49:58,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3286 states, 3285 states have (on average 1.3470319634703196) internal successors, (4425), 3285 states have internal predecessors, (4425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:58,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3286 states to 3286 states and 4425 transitions. [2021-11-23 16:49:58,238 INFO L78 Accepts]: Start accepts. Automaton has 3286 states and 4425 transitions. Word has length 151 [2021-11-23 16:49:58,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:58,238 INFO L470 AbstractCegarLoop]: Abstraction has 3286 states and 4425 transitions. [2021-11-23 16:49:58,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:58,238 INFO L276 IsEmpty]: Start isEmpty. Operand 3286 states and 4425 transitions. [2021-11-23 16:49:58,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-23 16:49:58,241 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:58,241 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:49:58,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (68)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:58,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:58,443 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:49:58,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:58,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1002313796, now seen corresponding path program 1 times [2021-11-23 16:49:58,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:58,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1700145410] [2021-11-23 16:49:58,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:58,444 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:58,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:58,445 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:58,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2021-11-23 16:49:58,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:58,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:49:58,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:58,972 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 16:49:58,972 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:58,972 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:58,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1700145410] [2021-11-23 16:49:58,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1700145410] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:58,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:58,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:49:58,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70743591] [2021-11-23 16:49:58,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:58,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:49:58,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:58,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:49:58,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:49:58,974 INFO L87 Difference]: Start difference. First operand 3286 states and 4425 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:59,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:59,322 INFO L93 Difference]: Finished difference Result 5414 states and 7488 transitions. [2021-11-23 16:49:59,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:49:59,323 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 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 151 [2021-11-23 16:49:59,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:59,327 INFO L225 Difference]: With dead ends: 5414 [2021-11-23 16:49:59,327 INFO L226 Difference]: Without dead ends: 3286 [2021-11-23 16:49:59,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 149 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 16:49:59,331 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 128 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:59,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 160 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:49:59,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3286 states. [2021-11-23 16:49:59,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3286 to 3286. [2021-11-23 16:49:59,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3286 states, 3285 states have (on average 1.3372907153729072) internal successors, (4393), 3285 states have internal predecessors, (4393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:59,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3286 states to 3286 states and 4393 transitions. [2021-11-23 16:49:59,605 INFO L78 Accepts]: Start accepts. Automaton has 3286 states and 4393 transitions. Word has length 151 [2021-11-23 16:49:59,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:59,606 INFO L470 AbstractCegarLoop]: Abstraction has 3286 states and 4393 transitions. [2021-11-23 16:49:59,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:59,606 INFO L276 IsEmpty]: Start isEmpty. Operand 3286 states and 4393 transitions. [2021-11-23 16:49:59,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-23 16:49:59,611 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:59,611 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:49:59,626 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (69)] Ended with exit code 0 [2021-11-23 16:49:59,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:59,825 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:49:59,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:59,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1447183160, now seen corresponding path program 1 times [2021-11-23 16:49:59,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:59,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1834601708] [2021-11-23 16:49:59,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:59,827 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:59,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:59,829 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:59,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2021-11-23 16:50:00,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:00,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:50:00,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:00,398 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 16:50:00,398 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:50:00,399 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:00,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1834601708] [2021-11-23 16:50:00,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1834601708] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:50:00,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:50:00,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:50:00,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163903699] [2021-11-23 16:50:00,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:50:00,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:50:00,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:00,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:50:00,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:50:00,401 INFO L87 Difference]: Start difference. First operand 3286 states and 4393 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:00,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:00,760 INFO L93 Difference]: Finished difference Result 5420 states and 7439 transitions. [2021-11-23 16:50:00,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:50:00,761 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 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 151 [2021-11-23 16:50:00,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:00,765 INFO L225 Difference]: With dead ends: 5420 [2021-11-23 16:50:00,765 INFO L226 Difference]: Without dead ends: 3286 [2021-11-23 16:50:00,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 149 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 16:50:00,770 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 129 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:00,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 178 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:50:00,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3286 states. [2021-11-23 16:50:01,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3286 to 3286. [2021-11-23 16:50:01,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3286 states, 3285 states have (on average 1.3275494672754946) internal successors, (4361), 3285 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:01,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3286 states to 3286 states and 4361 transitions. [2021-11-23 16:50:01,061 INFO L78 Accepts]: Start accepts. Automaton has 3286 states and 4361 transitions. Word has length 151 [2021-11-23 16:50:01,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:01,061 INFO L470 AbstractCegarLoop]: Abstraction has 3286 states and 4361 transitions. [2021-11-23 16:50:01,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:01,062 INFO L276 IsEmpty]: Start isEmpty. Operand 3286 states and 4361 transitions. [2021-11-23 16:50:01,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-23 16:50:01,065 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:01,065 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:50:01,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (70)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:01,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:50:01,267 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:50:01,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:01,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1583443248, now seen corresponding path program 1 times [2021-11-23 16:50:01,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:01,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [907886178] [2021-11-23 16:50:01,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:01,269 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:01,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:01,270 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:01,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2021-11-23 16:50:01,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:01,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:50:01,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:01,789 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 16:50:01,789 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:50:01,790 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:01,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [907886178] [2021-11-23 16:50:01,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [907886178] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:50:01,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:50:01,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:50:01,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400153996] [2021-11-23 16:50:01,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:50:01,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:50:01,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:01,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:50:01,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:50:01,792 INFO L87 Difference]: Start difference. First operand 3286 states and 4361 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:02,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:02,163 INFO L93 Difference]: Finished difference Result 5426 states and 7390 transitions. [2021-11-23 16:50:02,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:50:02,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 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 151 [2021-11-23 16:50:02,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:02,168 INFO L225 Difference]: With dead ends: 5426 [2021-11-23 16:50:02,168 INFO L226 Difference]: Without dead ends: 3286 [2021-11-23 16:50:02,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 149 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 16:50:02,204 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 130 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 196 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 16:50:02,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 196 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:50:02,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3286 states. [2021-11-23 16:50:02,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3286 to 3286. [2021-11-23 16:50:02,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3286 states, 3285 states have (on average 1.315372907153729) internal successors, (4321), 3285 states have internal predecessors, (4321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:02,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3286 states to 3286 states and 4321 transitions. [2021-11-23 16:50:02,477 INFO L78 Accepts]: Start accepts. Automaton has 3286 states and 4321 transitions. Word has length 151 [2021-11-23 16:50:02,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:02,478 INFO L470 AbstractCegarLoop]: Abstraction has 3286 states and 4321 transitions. [2021-11-23 16:50:02,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:02,478 INFO L276 IsEmpty]: Start isEmpty. Operand 3286 states and 4321 transitions. [2021-11-23 16:50:02,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-23 16:50:02,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:02,481 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:50:02,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (71)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:02,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:50:02,682 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:50:02,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:02,683 INFO L85 PathProgramCache]: Analyzing trace with hash -309860436, now seen corresponding path program 1 times [2021-11-23 16:50:02,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:02,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1241902788] [2021-11-23 16:50:02,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:02,683 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:02,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:02,684 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:02,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2021-11-23 16:50:03,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:03,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:50:03,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:03,233 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 16:50:03,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:50:03,233 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:03,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1241902788] [2021-11-23 16:50:03,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1241902788] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:50:03,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:50:03,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:50:03,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520252853] [2021-11-23 16:50:03,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:50:03,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:50:03,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:03,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:50:03,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:50:03,235 INFO L87 Difference]: Start difference. First operand 3286 states and 4321 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 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 16:50:03,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:03,616 INFO L93 Difference]: Finished difference Result 5432 states and 7333 transitions. [2021-11-23 16:50:03,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:50:03,617 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 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 151 [2021-11-23 16:50:03,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:03,623 INFO L225 Difference]: With dead ends: 5432 [2021-11-23 16:50:03,623 INFO L226 Difference]: Without dead ends: 3286 [2021-11-23 16:50:03,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 149 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 16:50:03,628 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 131 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 214 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 16:50:03,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 214 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:50:03,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3286 states. [2021-11-23 16:50:04,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3286 to 3286. [2021-11-23 16:50:04,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3286 states, 3285 states have (on average 1.2983257229832572) internal successors, (4265), 3285 states have internal predecessors, (4265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:04,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3286 states to 3286 states and 4265 transitions. [2021-11-23 16:50:04,045 INFO L78 Accepts]: Start accepts. Automaton has 3286 states and 4265 transitions. Word has length 151 [2021-11-23 16:50:04,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:04,045 INFO L470 AbstractCegarLoop]: Abstraction has 3286 states and 4265 transitions. [2021-11-23 16:50:04,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 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 16:50:04,046 INFO L276 IsEmpty]: Start isEmpty. Operand 3286 states and 4265 transitions. [2021-11-23 16:50:04,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-23 16:50:04,048 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:04,049 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:50:04,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (72)] Ended with exit code 0 [2021-11-23 16:50:04,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:50:04,249 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:50:04,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:04,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1117970268, now seen corresponding path program 1 times [2021-11-23 16:50:04,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:04,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [735305667] [2021-11-23 16:50:04,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:04,251 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:04,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:04,254 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:04,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2021-11-23 16:50:04,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:04,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:50:04,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:04,761 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 16:50:04,761 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:50:04,761 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:04,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [735305667] [2021-11-23 16:50:04,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [735305667] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:50:04,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:50:04,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:50:04,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557624822] [2021-11-23 16:50:04,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:50:04,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:50:04,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:04,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:50:04,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:50:04,763 INFO L87 Difference]: Start difference. First operand 3286 states and 4265 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 16:50:05,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:05,152 INFO L93 Difference]: Finished difference Result 5438 states and 7260 transitions. [2021-11-23 16:50:05,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:50:05,153 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 151 [2021-11-23 16:50:05,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:05,157 INFO L225 Difference]: With dead ends: 5438 [2021-11-23 16:50:05,158 INFO L226 Difference]: Without dead ends: 3286 [2021-11-23 16:50:05,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 149 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 16:50:05,161 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 126 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 224 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 16:50:05,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 224 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:50:05,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3286 states. [2021-11-23 16:50:05,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3286 to 3286. [2021-11-23 16:50:05,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3286 states, 3285 states have (on average 1.2812785388127854) internal successors, (4209), 3285 states have internal predecessors, (4209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:05,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3286 states to 3286 states and 4209 transitions. [2021-11-23 16:50:05,455 INFO L78 Accepts]: Start accepts. Automaton has 3286 states and 4209 transitions. Word has length 151 [2021-11-23 16:50:05,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:05,455 INFO L470 AbstractCegarLoop]: Abstraction has 3286 states and 4209 transitions. [2021-11-23 16:50:05,455 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 16:50:05,456 INFO L276 IsEmpty]: Start isEmpty. Operand 3286 states and 4209 transitions. [2021-11-23 16:50:05,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-23 16:50:05,458 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:05,459 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:50:05,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (73)] Ended with exit code 0 [2021-11-23 16:50:05,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:50:05,659 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:50:05,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:05,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1973605904, now seen corresponding path program 1 times [2021-11-23 16:50:05,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:05,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [676900254] [2021-11-23 16:50:05,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:05,661 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:05,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:05,662 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:05,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2021-11-23 16:50:05,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:05,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:50:05,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:07,235 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:07,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:50:07,986 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:07,987 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:07,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [676900254] [2021-11-23 16:50:07,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [676900254] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:50:07,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1800367057] [2021-11-23 16:50:07,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:07,987 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:50:07,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:50:07,988 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:50:07,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (75)] Waiting until timeout for monitored process [2021-11-23 16:50:08,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:08,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:50:08,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:09,707 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:09,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:50:10,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:10,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1800367057] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:50:10,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109230987] [2021-11-23 16:50:10,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:10,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:50:10,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:50:10,470 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:50:10,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-11-23 16:50:10,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:10,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:50:10,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:12,158 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:12,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:50:13,033 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:13,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109230987] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:50:13,034 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:50:13,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 16:50:13,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214144803] [2021-11-23 16:50:13,035 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:50:13,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 16:50:13,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:13,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 16:50:13,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 16:50:13,036 INFO L87 Difference]: Start difference. First operand 3286 states and 4209 transitions. Second operand has 16 states, 16 states have (on average 17.25) internal successors, (276), 15 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:13,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:13,563 INFO L93 Difference]: Finished difference Result 6365 states and 8479 transitions. [2021-11-23 16:50:13,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 16:50:13,564 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 17.25) internal successors, (276), 15 states have internal predecessors, (276), 0 states have call successors, (0), 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 151 [2021-11-23 16:50:13,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:13,569 INFO L225 Difference]: With dead ends: 6365 [2021-11-23 16:50:13,569 INFO L226 Difference]: Without dead ends: 4247 [2021-11-23 16:50:13,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 902 GetRequests, 887 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-11-23 16:50:13,572 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 154 mSDsluCounter, 1740 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 1959 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:13,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 1959 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 268 Unchecked, 0.1s Time] [2021-11-23 16:50:13,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4247 states. [2021-11-23 16:50:13,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4247 to 3257. [2021-11-23 16:50:13,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3257 states, 3256 states have (on average 1.2840909090909092) internal successors, (4181), 3256 states have internal predecessors, (4181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:13,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3257 states to 3257 states and 4181 transitions. [2021-11-23 16:50:13,908 INFO L78 Accepts]: Start accepts. Automaton has 3257 states and 4181 transitions. Word has length 151 [2021-11-23 16:50:13,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:13,909 INFO L470 AbstractCegarLoop]: Abstraction has 3257 states and 4181 transitions. [2021-11-23 16:50:13,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 17.25) internal successors, (276), 15 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:13,909 INFO L276 IsEmpty]: Start isEmpty. Operand 3257 states and 4181 transitions. [2021-11-23 16:50:13,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-23 16:50:13,912 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:13,912 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:50:13,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (75)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:14,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (74)] Ended with exit code 0 [2021-11-23 16:50:14,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:14,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:50:14,513 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:50:14,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:14,514 INFO L85 PathProgramCache]: Analyzing trace with hash 892442129, now seen corresponding path program 1 times [2021-11-23 16:50:14,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:14,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [683418856] [2021-11-23 16:50:14,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:14,514 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:14,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:14,516 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:14,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2021-11-23 16:50:14,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:14,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:50:14,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:15,675 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 16:50:15,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:50:15,676 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:15,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [683418856] [2021-11-23 16:50:15,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [683418856] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:50:15,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:50:15,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:50:15,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742377192] [2021-11-23 16:50:15,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:50:15,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:50:15,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:15,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:50:15,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:50:15,678 INFO L87 Difference]: Start difference. First operand 3257 states and 4181 transitions. Second operand has 5 states, 5 states have (on average 29.4) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:16,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:16,288 INFO L93 Difference]: Finished difference Result 7618 states and 10190 transitions. [2021-11-23 16:50:16,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:50:16,288 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 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 151 [2021-11-23 16:50:16,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:16,295 INFO L225 Difference]: With dead ends: 7618 [2021-11-23 16:50:16,295 INFO L226 Difference]: Without dead ends: 5490 [2021-11-23 16:50:16,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 147 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 16:50:16,299 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 214 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:16,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 439 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 151 Unchecked, 0.1s Time] [2021-11-23 16:50:16,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5490 states. [2021-11-23 16:50:16,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5490 to 5488. [2021-11-23 16:50:16,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5488 states, 5487 states have (on average 1.3152906870785492) internal successors, (7217), 5487 states have internal predecessors, (7217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:16,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5488 states to 5488 states and 7217 transitions. [2021-11-23 16:50:16,873 INFO L78 Accepts]: Start accepts. Automaton has 5488 states and 7217 transitions. Word has length 151 [2021-11-23 16:50:16,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:16,873 INFO L470 AbstractCegarLoop]: Abstraction has 5488 states and 7217 transitions. [2021-11-23 16:50:16,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:16,873 INFO L276 IsEmpty]: Start isEmpty. Operand 5488 states and 7217 transitions. [2021-11-23 16:50:16,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-23 16:50:16,877 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:16,877 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:50:16,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (77)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:17,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:50:17,078 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:50:17,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:17,078 INFO L85 PathProgramCache]: Analyzing trace with hash -285957659, now seen corresponding path program 1 times [2021-11-23 16:50:17,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:17,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1889904663] [2021-11-23 16:50:17,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:17,079 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:17,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:17,080 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:17,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2021-11-23 16:50:17,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:17,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:50:17,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:18,230 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 16:50:18,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:50:18,230 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:18,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1889904663] [2021-11-23 16:50:18,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1889904663] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:50:18,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:50:18,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:50:18,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970773611] [2021-11-23 16:50:18,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:50:18,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:50:18,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:18,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:50:18,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:50:18,232 INFO L87 Difference]: Start difference. First operand 5488 states and 7217 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:18,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:18,819 INFO L93 Difference]: Finished difference Result 9729 states and 13066 transitions. [2021-11-23 16:50:18,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:50:18,819 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 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 151 [2021-11-23 16:50:18,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:18,826 INFO L225 Difference]: With dead ends: 9729 [2021-11-23 16:50:18,826 INFO L226 Difference]: Without dead ends: 5488 [2021-11-23 16:50:18,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 147 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 16:50:18,831 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 58 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:18,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 454 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 92 Unchecked, 0.1s Time] [2021-11-23 16:50:18,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5488 states. [2021-11-23 16:50:19,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5488 to 5080. [2021-11-23 16:50:19,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5080 states, 5079 states have (on average 1.3327426658791102) internal successors, (6769), 5079 states have internal predecessors, (6769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:19,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5080 states to 5080 states and 6769 transitions. [2021-11-23 16:50:19,389 INFO L78 Accepts]: Start accepts. Automaton has 5080 states and 6769 transitions. Word has length 151 [2021-11-23 16:50:19,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:19,389 INFO L470 AbstractCegarLoop]: Abstraction has 5080 states and 6769 transitions. [2021-11-23 16:50:19,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:19,389 INFO L276 IsEmpty]: Start isEmpty. Operand 5080 states and 6769 transitions. [2021-11-23 16:50:19,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-23 16:50:19,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:19,393 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:50:19,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (78)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:19,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:50:19,593 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:50:19,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:19,594 INFO L85 PathProgramCache]: Analyzing trace with hash -499848910, now seen corresponding path program 1 times [2021-11-23 16:50:19,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:19,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [595150985] [2021-11-23 16:50:19,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:19,595 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:19,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:19,597 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:19,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2021-11-23 16:50:19,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:19,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:50:19,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:20,733 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 16:50:20,733 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:50:20,733 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:20,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [595150985] [2021-11-23 16:50:20,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [595150985] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:50:20,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:50:20,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:50:20,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157425021] [2021-11-23 16:50:20,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:50:20,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:50:20,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:20,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:50:20,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:50:20,735 INFO L87 Difference]: Start difference. First operand 5080 states and 6769 transitions. Second operand has 5 states, 5 states have (on average 29.0) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:21,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:21,883 INFO L93 Difference]: Finished difference Result 13852 states and 18793 transitions. [2021-11-23 16:50:21,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:50:21,884 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 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 151 [2021-11-23 16:50:21,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:21,896 INFO L225 Difference]: With dead ends: 13852 [2021-11-23 16:50:21,896 INFO L226 Difference]: Without dead ends: 9599 [2021-11-23 16:50:21,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 147 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 16:50:21,902 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 242 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:21,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 449 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 92 Invalid, 0 Unknown, 163 Unchecked, 0.1s Time] [2021-11-23 16:50:21,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9599 states. [2021-11-23 16:50:22,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9599 to 9597. [2021-11-23 16:50:22,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9597 states, 9596 states have (on average 1.3412880366819508) internal successors, (12871), 9596 states have internal predecessors, (12871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:22,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9597 states to 9597 states and 12871 transitions. [2021-11-23 16:50:22,884 INFO L78 Accepts]: Start accepts. Automaton has 9597 states and 12871 transitions. Word has length 151 [2021-11-23 16:50:22,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:22,884 INFO L470 AbstractCegarLoop]: Abstraction has 9597 states and 12871 transitions. [2021-11-23 16:50:22,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:22,885 INFO L276 IsEmpty]: Start isEmpty. Operand 9597 states and 12871 transitions. [2021-11-23 16:50:22,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-23 16:50:22,889 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:22,890 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:50:22,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (79)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:23,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:50:23,091 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:50:23,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:23,091 INFO L85 PathProgramCache]: Analyzing trace with hash -5096932, now seen corresponding path program 1 times [2021-11-23 16:50:23,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:23,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [341342205] [2021-11-23 16:50:23,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:23,092 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:23,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:23,093 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:23,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2021-11-23 16:50:23,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:23,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:50:23,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:24,229 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 16:50:24,229 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:50:24,229 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:24,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [341342205] [2021-11-23 16:50:24,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [341342205] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:50:24,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:50:24,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:50:24,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295541489] [2021-11-23 16:50:24,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:50:24,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:50:24,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:24,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:50:24,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:50:24,231 INFO L87 Difference]: Start difference. First operand 9597 states and 12871 transitions. Second operand has 5 states, 5 states have (on average 28.8) 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 16:50:25,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:25,279 INFO L93 Difference]: Finished difference Result 18075 states and 24524 transitions. [2021-11-23 16:50:25,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:50:25,280 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.8) 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 151 [2021-11-23 16:50:25,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:25,293 INFO L225 Difference]: With dead ends: 18075 [2021-11-23 16:50:25,293 INFO L226 Difference]: Without dead ends: 9597 [2021-11-23 16:50:25,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 147 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 16:50:25,301 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 173 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:25,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 348 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 90 Unchecked, 0.1s Time] [2021-11-23 16:50:25,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9597 states. [2021-11-23 16:50:26,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9597 to 9597. [2021-11-23 16:50:26,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9597 states, 9596 states have (on average 1.340454355981659) internal successors, (12863), 9596 states have internal predecessors, (12863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:26,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9597 states to 9597 states and 12863 transitions. [2021-11-23 16:50:26,306 INFO L78 Accepts]: Start accepts. Automaton has 9597 states and 12863 transitions. Word has length 151 [2021-11-23 16:50:26,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:26,306 INFO L470 AbstractCegarLoop]: Abstraction has 9597 states and 12863 transitions. [2021-11-23 16:50:26,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) 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 16:50:26,306 INFO L276 IsEmpty]: Start isEmpty. Operand 9597 states and 12863 transitions. [2021-11-23 16:50:26,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-23 16:50:26,311 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:26,311 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:50:26,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (80)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:26,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:50:26,512 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:50:26,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:26,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1414604687, now seen corresponding path program 1 times [2021-11-23 16:50:26,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:26,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [277243420] [2021-11-23 16:50:26,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:26,513 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:26,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:26,514 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:26,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2021-11-23 16:50:26,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:26,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:50:26,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:28,607 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:28,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:50:29,133 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:29,133 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:29,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [277243420] [2021-11-23 16:50:29,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [277243420] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:50:29,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1894535368] [2021-11-23 16:50:29,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:29,134 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:50:29,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:50:29,135 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:50:29,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (82)] Waiting until timeout for monitored process [2021-11-23 16:50:29,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:29,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:50:29,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:31,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:31,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:50:31,858 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:31,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1894535368] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:50:31,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476085469] [2021-11-23 16:50:31,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:31,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:50:31,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:50:31,860 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:50:31,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-11-23 16:50:32,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:32,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:50:32,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:34,032 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:34,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:50:34,505 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:34,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476085469] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:50:34,506 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:50:34,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 16:50:34,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338134686] [2021-11-23 16:50:34,506 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:50:34,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 16:50:34,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:34,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 16:50:34,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 16:50:34,508 INFO L87 Difference]: Start difference. First operand 9597 states and 12863 transitions. Second operand has 16 states, 16 states have (on average 17.625) internal successors, (282), 15 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:39,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:39,259 INFO L93 Difference]: Finished difference Result 42203 states and 57982 transitions. [2021-11-23 16:50:39,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-23 16:50:39,260 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 17.625) internal successors, (282), 15 states have internal predecessors, (282), 0 states have call successors, (0), 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 151 [2021-11-23 16:50:39,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:39,310 INFO L225 Difference]: With dead ends: 42203 [2021-11-23 16:50:39,310 INFO L226 Difference]: Without dead ends: 33849 [2021-11-23 16:50:39,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 924 GetRequests, 886 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=275, Invalid=1285, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 16:50:39,320 INFO L933 BasicCegarLoop]: 276 mSDtfsCounter, 943 mSDsluCounter, 2172 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 943 SdHoareTripleChecker+Valid, 2448 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 729 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:39,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [943 Valid, 2448 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 560 Invalid, 0 Unknown, 729 Unchecked, 0.5s Time] [2021-11-23 16:50:39,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33849 states. [2021-11-23 16:50:41,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33849 to 13885. [2021-11-23 16:50:41,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13885 states, 13884 states have (on average 1.351123595505618) internal successors, (18759), 13884 states have internal predecessors, (18759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:41,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13885 states to 13885 states and 18759 transitions. [2021-11-23 16:50:41,089 INFO L78 Accepts]: Start accepts. Automaton has 13885 states and 18759 transitions. Word has length 151 [2021-11-23 16:50:41,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:41,089 INFO L470 AbstractCegarLoop]: Abstraction has 13885 states and 18759 transitions. [2021-11-23 16:50:41,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 17.625) internal successors, (282), 15 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:41,090 INFO L276 IsEmpty]: Start isEmpty. Operand 13885 states and 18759 transitions. [2021-11-23 16:50:41,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-23 16:50:41,094 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:41,094 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:50:41,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-11-23 16:50:41,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (82)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:41,505 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (81)] Ended with exit code 0 [2021-11-23 16:50:41,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:50:41,696 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:50:41,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:41,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1452930062, now seen corresponding path program 1 times [2021-11-23 16:50:41,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:41,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1805037560] [2021-11-23 16:50:41,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:41,697 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:41,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:41,699 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:41,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2021-11-23 16:50:41,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:41,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:50:41,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:42,825 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 16:50:42,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:50:42,826 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:42,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1805037560] [2021-11-23 16:50:42,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1805037560] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:50:42,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:50:42,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:50:42,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722722192] [2021-11-23 16:50:42,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:50:42,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:50:42,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:42,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:50:42,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:50:42,829 INFO L87 Difference]: Start difference. First operand 13885 states and 18759 transitions. Second operand has 5 states, 5 states have (on average 28.6) internal successors, (143), 4 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 16:50:45,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:45,816 INFO L93 Difference]: Finished difference Result 35529 states and 48305 transitions. [2021-11-23 16:50:45,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:50:45,816 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.6) internal successors, (143), 4 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 151 [2021-11-23 16:50:45,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:45,848 INFO L225 Difference]: With dead ends: 35529 [2021-11-23 16:50:45,848 INFO L226 Difference]: Without dead ends: 22371 [2021-11-23 16:50:45,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 147 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 16:50:45,860 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 287 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:45,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 458 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 173 Unchecked, 0.1s Time] [2021-11-23 16:50:45,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22371 states. [2021-11-23 16:50:48,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22371 to 22369. [2021-11-23 16:50:48,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22369 states, 22368 states have (on average 1.3515289699570816) internal successors, (30231), 22368 states have internal predecessors, (30231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:48,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22369 states to 22369 states and 30231 transitions. [2021-11-23 16:50:48,559 INFO L78 Accepts]: Start accepts. Automaton has 22369 states and 30231 transitions. Word has length 151 [2021-11-23 16:50:48,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:48,559 INFO L470 AbstractCegarLoop]: Abstraction has 22369 states and 30231 transitions. [2021-11-23 16:50:48,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.6) internal successors, (143), 4 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 16:50:48,560 INFO L276 IsEmpty]: Start isEmpty. Operand 22369 states and 30231 transitions. [2021-11-23 16:50:48,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-23 16:50:48,566 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:48,567 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:50:48,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (84)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:48,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:50:48,767 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:50:48,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:48,768 INFO L85 PathProgramCache]: Analyzing trace with hash -734494264, now seen corresponding path program 1 times [2021-11-23 16:50:48,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:48,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [644547865] [2021-11-23 16:50:48,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:48,769 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:48,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:48,770 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:48,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2021-11-23 16:50:49,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:49,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 16:50:49,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:51,938 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:51,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:50:52,653 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:52,653 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:52,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [644547865] [2021-11-23 16:50:52,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [644547865] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:50:52,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [380967569] [2021-11-23 16:50:52,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:52,654 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:50:52,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:50:52,655 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:50:52,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (86)] Waiting until timeout for monitored process [2021-11-23 16:50:53,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:53,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 16:50:53,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:56,454 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:56,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:50:57,055 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:57,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [380967569] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:50:57,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666826821] [2021-11-23 16:50:57,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:57,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:50:57,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:50:57,058 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:50:57,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-11-23 16:50:57,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:57,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:50:57,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:00,221 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:00,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:01,276 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:01,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666826821] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:01,276 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:51:01,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 8, 8] total 31 [2021-11-23 16:51:01,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646686149] [2021-11-23 16:51:01,277 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:51:01,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-23 16:51:01,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:51:01,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-23 16:51:01,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2021-11-23 16:51:01,279 INFO L87 Difference]: Start difference. First operand 22369 states and 30231 transitions. Second operand has 32 states, 32 states have (on average 15.40625) internal successors, (493), 31 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:04,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:04,911 INFO L93 Difference]: Finished difference Result 33215 states and 45112 transitions. [2021-11-23 16:51:04,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 16:51:04,911 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 15.40625) internal successors, (493), 31 states have internal predecessors, (493), 0 states have call successors, (0), 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 152 [2021-11-23 16:51:04,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:04,944 INFO L225 Difference]: With dead ends: 33215 [2021-11-23 16:51:04,944 INFO L226 Difference]: Without dead ends: 22521 [2021-11-23 16:51:04,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 919 GetRequests, 880 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=221, Invalid=1419, Unknown=0, NotChecked=0, Total=1640 [2021-11-23 16:51:04,955 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 133 mSDsluCounter, 2073 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 2206 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:51:04,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 2206 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 167 Unchecked, 0.1s Time] [2021-11-23 16:51:04,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22521 states. [2021-11-23 16:51:07,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22521 to 22505. [2021-11-23 16:51:07,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22505 states, 22504 states have (on average 1.352248489157483) internal successors, (30431), 22504 states have internal predecessors, (30431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:07,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22505 states to 22505 states and 30431 transitions. [2021-11-23 16:51:07,657 INFO L78 Accepts]: Start accepts. Automaton has 22505 states and 30431 transitions. Word has length 152 [2021-11-23 16:51:07,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:07,657 INFO L470 AbstractCegarLoop]: Abstraction has 22505 states and 30431 transitions. [2021-11-23 16:51:07,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 15.40625) internal successors, (493), 31 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:07,657 INFO L276 IsEmpty]: Start isEmpty. Operand 22505 states and 30431 transitions. [2021-11-23 16:51:07,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-23 16:51:07,664 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:07,664 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:51:07,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (85)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:07,868 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (86)] Ended with exit code 0 [2021-11-23 16:51:08,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:08,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:51:08,265 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:51:08,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:08,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1640497010, now seen corresponding path program 1 times [2021-11-23 16:51:08,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:08,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [685213951] [2021-11-23 16:51:08,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:08,267 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:08,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:08,267 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:08,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2021-11-23 16:51:08,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:08,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 16:51:08,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:11,491 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:11,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:12,211 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:12,211 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:12,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [685213951] [2021-11-23 16:51:12,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [685213951] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:12,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [889653894] [2021-11-23 16:51:12,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:12,212 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:51:12,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:51:12,212 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:51:12,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (89)] Waiting until timeout for monitored process [2021-11-23 16:51:12,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:12,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 16:51:12,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:15,906 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:15,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:16,402 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:16,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [889653894] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:16,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577045792] [2021-11-23 16:51:16,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:16,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:51:16,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:51:16,404 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:51:16,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-11-23 16:51:16,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:16,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:51:16,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:19,197 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:19,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:20,183 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:20,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577045792] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:20,184 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:51:20,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 8, 8] total 31 [2021-11-23 16:51:20,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042795613] [2021-11-23 16:51:20,185 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:51:20,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-23 16:51:20,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:51:20,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-23 16:51:20,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2021-11-23 16:51:20,186 INFO L87 Difference]: Start difference. First operand 22505 states and 30431 transitions. Second operand has 32 states, 32 states have (on average 15.40625) internal successors, (493), 31 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:23,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:23,508 INFO L93 Difference]: Finished difference Result 33247 states and 45152 transitions. [2021-11-23 16:51:23,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 16:51:23,509 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 15.40625) internal successors, (493), 31 states have internal predecessors, (493), 0 states have call successors, (0), 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 152 [2021-11-23 16:51:23,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:23,544 INFO L225 Difference]: With dead ends: 33247 [2021-11-23 16:51:23,544 INFO L226 Difference]: Without dead ends: 22553 [2021-11-23 16:51:23,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 918 GetRequests, 879 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=236, Invalid=1404, Unknown=0, NotChecked=0, Total=1640 [2021-11-23 16:51:23,559 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 157 mSDsluCounter, 2073 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 2202 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 180 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:51:23,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 2202 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 109 Invalid, 0 Unknown, 180 Unchecked, 0.1s Time] [2021-11-23 16:51:23,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22553 states. [2021-11-23 16:51:26,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22553 to 22505. [2021-11-23 16:51:26,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22505 states, 22504 states have (on average 1.352248489157483) internal successors, (30431), 22504 states have internal predecessors, (30431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:26,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22505 states to 22505 states and 30431 transitions. [2021-11-23 16:51:26,247 INFO L78 Accepts]: Start accepts. Automaton has 22505 states and 30431 transitions. Word has length 152 [2021-11-23 16:51:26,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:26,248 INFO L470 AbstractCegarLoop]: Abstraction has 22505 states and 30431 transitions. [2021-11-23 16:51:26,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 15.40625) internal successors, (493), 31 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:26,248 INFO L276 IsEmpty]: Start isEmpty. Operand 22505 states and 30431 transitions. [2021-11-23 16:51:26,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-23 16:51:26,255 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:26,255 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:51:26,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (89)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:26,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2021-11-23 16:51:26,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (88)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:26,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:51:26,858 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:51:26,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:26,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1501409551, now seen corresponding path program 1 times [2021-11-23 16:51:26,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:26,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [952466529] [2021-11-23 16:51:26,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:26,859 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:26,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:26,860 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:26,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (91)] Waiting until timeout for monitored process [2021-11-23 16:51:27,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:27,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:51:27,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:27,390 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:27,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:51:27,391 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:27,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [952466529] [2021-11-23 16:51:27,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [952466529] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:51:27,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:51:27,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:51:27,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917519069] [2021-11-23 16:51:27,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:51:27,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:51:27,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:51:27,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:51:27,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:51:27,393 INFO L87 Difference]: Start difference. First operand 22505 states and 30431 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:28,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:28,942 INFO L93 Difference]: Finished difference Result 33129 states and 44857 transitions. [2021-11-23 16:51:28,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:51:28,942 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 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 152 [2021-11-23 16:51:28,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:28,958 INFO L225 Difference]: With dead ends: 33129 [2021-11-23 16:51:28,958 INFO L226 Difference]: Without dead ends: 11863 [2021-11-23 16:51:28,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 150 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 16:51:28,975 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 74 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 343 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 16:51:28,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 343 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:51:28,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11863 states. [2021-11-23 16:51:30,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11863 to 11861. [2021-11-23 16:51:30,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11861 states, 11860 states have (on average 1.3233558178752107) internal successors, (15695), 11860 states have internal predecessors, (15695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:30,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11861 states to 11861 states and 15695 transitions. [2021-11-23 16:51:30,355 INFO L78 Accepts]: Start accepts. Automaton has 11861 states and 15695 transitions. Word has length 152 [2021-11-23 16:51:30,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:30,356 INFO L470 AbstractCegarLoop]: Abstraction has 11861 states and 15695 transitions. [2021-11-23 16:51:30,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:30,356 INFO L276 IsEmpty]: Start isEmpty. Operand 11861 states and 15695 transitions. [2021-11-23 16:51:30,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-23 16:51:30,360 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:30,361 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:51:30,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (91)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:30,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:51:30,561 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:51:30,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:30,562 INFO L85 PathProgramCache]: Analyzing trace with hash -793337085, now seen corresponding path program 1 times [2021-11-23 16:51:30,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:30,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1890478653] [2021-11-23 16:51:30,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:30,563 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:30,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:30,570 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:30,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2021-11-23 16:51:30,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:30,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:51:30,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:32,735 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:32,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:33,311 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:33,311 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:33,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1890478653] [2021-11-23 16:51:33,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1890478653] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:33,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1599989725] [2021-11-23 16:51:33,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:33,312 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:51:33,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:51:33,313 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:51:33,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (93)] Waiting until timeout for monitored process [2021-11-23 16:51:33,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:33,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:51:33,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:35,613 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:35,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:36,211 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:36,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1599989725] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:36,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983440876] [2021-11-23 16:51:36,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:36,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:51:36,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:51:36,214 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:51:36,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-11-23 16:51:36,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:36,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:51:36,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:38,651 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:38,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:39,280 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:39,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983440876] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:39,281 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:51:39,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 16:51:39,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176333275] [2021-11-23 16:51:39,281 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:51:39,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 16:51:39,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:51:39,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 16:51:39,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 16:51:39,283 INFO L87 Difference]: Start difference. First operand 11861 states and 15695 transitions. Second operand has 16 states, 16 states have (on average 18.0) internal successors, (288), 15 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:44,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:44,023 INFO L93 Difference]: Finished difference Result 41343 states and 55060 transitions. [2021-11-23 16:51:44,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-23 16:51:44,024 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 18.0) internal successors, (288), 15 states have internal predecessors, (288), 0 states have call successors, (0), 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 152 [2021-11-23 16:51:44,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:44,075 INFO L225 Difference]: With dead ends: 41343 [2021-11-23 16:51:44,075 INFO L226 Difference]: Without dead ends: 30721 [2021-11-23 16:51:44,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 929 GetRequests, 894 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=227, Invalid=1105, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 16:51:44,090 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 773 mSDsluCounter, 1576 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 1818 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 519 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 16:51:44,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [773 Valid, 1818 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 497 Invalid, 0 Unknown, 519 Unchecked, 0.5s Time] [2021-11-23 16:51:44,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30721 states. [2021-11-23 16:51:46,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30721 to 22053. [2021-11-23 16:51:46,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22053 states, 22052 states have (on average 1.329267186649737) internal successors, (29313), 22052 states have internal predecessors, (29313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:46,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22053 states to 22053 states and 29313 transitions. [2021-11-23 16:51:46,998 INFO L78 Accepts]: Start accepts. Automaton has 22053 states and 29313 transitions. Word has length 152 [2021-11-23 16:51:46,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:46,999 INFO L470 AbstractCegarLoop]: Abstraction has 22053 states and 29313 transitions. [2021-11-23 16:51:46,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 18.0) internal successors, (288), 15 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:46,999 INFO L276 IsEmpty]: Start isEmpty. Operand 22053 states and 29313 transitions. [2021-11-23 16:51:47,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-23 16:51:47,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:47,004 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:51:47,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:47,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (93)] Ended with exit code 0 [2021-11-23 16:51:47,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (92)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:47,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:51:47,605 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:51:47,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:47,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1004965248, now seen corresponding path program 1 times [2021-11-23 16:51:47,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:47,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [382765919] [2021-11-23 16:51:47,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:47,606 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:47,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:47,607 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:47,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (95)] Waiting until timeout for monitored process [2021-11-23 16:51:47,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:47,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 16:51:47,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:50,854 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:50,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:51,685 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:51,685 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:51,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [382765919] [2021-11-23 16:51:51,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [382765919] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:51,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [514371000] [2021-11-23 16:51:51,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:51,686 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:51:51,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:51:51,687 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:51:51,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (96)] Waiting until timeout for monitored process [2021-11-23 16:51:52,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:52,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 16:51:52,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:55,643 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:55,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:56,386 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:56,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [514371000] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:56,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989334282] [2021-11-23 16:51:56,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:56,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:51:56,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:51:56,388 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:51:56,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-11-23 16:51:56,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:56,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:51:56,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:59,604 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:59,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:52:00,762 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:00,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989334282] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:52:00,762 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:52:00,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 8, 8] total 31 [2021-11-23 16:52:00,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559791035] [2021-11-23 16:52:00,763 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:52:00,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-23 16:52:00,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:52:00,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-23 16:52:00,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2021-11-23 16:52:00,765 INFO L87 Difference]: Start difference. First operand 22053 states and 29313 transitions. Second operand has 32 states, 32 states have (on average 15.78125) internal successors, (505), 31 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:04,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:04,577 INFO L93 Difference]: Finished difference Result 45063 states and 59870 transitions. [2021-11-23 16:52:04,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 16:52:04,578 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 15.78125) internal successors, (505), 31 states have internal predecessors, (505), 0 states have call successors, (0), 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 153 [2021-11-23 16:52:04,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:04,613 INFO L225 Difference]: With dead ends: 45063 [2021-11-23 16:52:04,613 INFO L226 Difference]: Without dead ends: 23725 [2021-11-23 16:52:04,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 924 GetRequests, 885 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=231, Invalid=1409, Unknown=0, NotChecked=0, Total=1640 [2021-11-23 16:52:04,632 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 208 mSDsluCounter, 1929 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 2057 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:52:04,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 2057 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 103 Invalid, 0 Unknown, 207 Unchecked, 0.1s Time] [2021-11-23 16:52:04,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23725 states. [2021-11-23 16:52:07,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23725 to 23133. [2021-11-23 16:52:07,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23133 states, 23132 states have (on average 1.3265173785232578) internal successors, (30685), 23132 states have internal predecessors, (30685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:07,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23133 states to 23133 states and 30685 transitions. [2021-11-23 16:52:07,809 INFO L78 Accepts]: Start accepts. Automaton has 23133 states and 30685 transitions. Word has length 153 [2021-11-23 16:52:07,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:07,809 INFO L470 AbstractCegarLoop]: Abstraction has 23133 states and 30685 transitions. [2021-11-23 16:52:07,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 15.78125) internal successors, (505), 31 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:07,809 INFO L276 IsEmpty]: Start isEmpty. Operand 23133 states and 30685 transitions. [2021-11-23 16:52:07,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-23 16:52:07,815 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:07,815 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:52:07,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (96)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:08,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2021-11-23 16:52:08,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (95)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:08,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:52:08,416 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:52:08,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:08,416 INFO L85 PathProgramCache]: Analyzing trace with hash 253763753, now seen corresponding path program 1 times [2021-11-23 16:52:08,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:08,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [581413692] [2021-11-23 16:52:08,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:08,417 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:08,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:08,418 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:08,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (98)] Waiting until timeout for monitored process [2021-11-23 16:52:08,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:08,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:52:08,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:08,964 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:08,964 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:52:08,964 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:52:08,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [581413692] [2021-11-23 16:52:08,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [581413692] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:52:08,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:52:08,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:52:08,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413027948] [2021-11-23 16:52:08,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:52:08,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:52:08,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:52:08,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:52:08,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:52:08,966 INFO L87 Difference]: Start difference. First operand 23133 states and 30685 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:10,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:10,860 INFO L93 Difference]: Finished difference Result 33805 states and 44871 transitions. [2021-11-23 16:52:10,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:52:10,860 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 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 153 [2021-11-23 16:52:10,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:10,879 INFO L225 Difference]: With dead ends: 33805 [2021-11-23 16:52:10,880 INFO L226 Difference]: Without dead ends: 12467 [2021-11-23 16:52:10,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 151 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 16:52:10,896 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 72 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 322 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 16:52:10,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 322 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:52:10,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12467 states. [2021-11-23 16:52:12,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12467 to 12465. [2021-11-23 16:52:12,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12465 states, 12464 states have (on average 1.299502567394095) internal successors, (16197), 12464 states have internal predecessors, (16197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:12,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12465 states to 12465 states and 16197 transitions. [2021-11-23 16:52:12,796 INFO L78 Accepts]: Start accepts. Automaton has 12465 states and 16197 transitions. Word has length 153 [2021-11-23 16:52:12,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:12,797 INFO L470 AbstractCegarLoop]: Abstraction has 12465 states and 16197 transitions. [2021-11-23 16:52:12,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:12,797 INFO L276 IsEmpty]: Start isEmpty. Operand 12465 states and 16197 transitions. [2021-11-23 16:52:12,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-23 16:52:12,801 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:12,801 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:52:12,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (98)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:13,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:52:13,003 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:52:13,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:13,004 INFO L85 PathProgramCache]: Analyzing trace with hash -88279163, now seen corresponding path program 1 times [2021-11-23 16:52:13,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:13,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [263701225] [2021-11-23 16:52:13,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:13,005 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:13,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:13,005 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:13,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (99)] Waiting until timeout for monitored process [2021-11-23 16:52:13,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:13,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:52:13,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:15,137 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:15,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:52:15,870 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:15,870 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:52:15,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [263701225] [2021-11-23 16:52:15,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [263701225] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:52:15,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1381720545] [2021-11-23 16:52:15,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:15,871 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:52:15,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:52:15,872 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:52:15,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (100)] Waiting until timeout for monitored process [2021-11-23 16:52:16,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:16,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:52:16,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:18,488 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:18,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:52:19,182 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:19,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1381720545] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:52:19,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149174193] [2021-11-23 16:52:19,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:19,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:52:19,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:52:19,184 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:52:19,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-11-23 16:52:19,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:19,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:52:19,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:21,696 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:21,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:52:22,254 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:22,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149174193] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:52:22,254 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:52:22,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 16:52:22,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183492185] [2021-11-23 16:52:22,255 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:52:22,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 16:52:22,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:52:22,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 16:52:22,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 16:52:22,257 INFO L87 Difference]: Start difference. First operand 12465 states and 16197 transitions. Second operand has 16 states, 16 states have (on average 18.375) internal successors, (294), 15 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:25,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:25,752 INFO L93 Difference]: Finished difference Result 31307 states and 40865 transitions. [2021-11-23 16:52:25,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-23 16:52:25,753 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 18.375) internal successors, (294), 15 states have internal predecessors, (294), 0 states have call successors, (0), 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 153 [2021-11-23 16:52:25,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:25,781 INFO L225 Difference]: With dead ends: 31307 [2021-11-23 16:52:25,781 INFO L226 Difference]: Without dead ends: 20637 [2021-11-23 16:52:25,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 929 GetRequests, 901 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-11-23 16:52:25,789 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 444 mSDsluCounter, 1690 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 1936 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 444 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:52:25,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 1936 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 367 Invalid, 0 Unknown, 444 Unchecked, 0.3s Time] [2021-11-23 16:52:25,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20637 states. [2021-11-23 16:52:27,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20637 to 11749. [2021-11-23 16:52:27,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11749 states, 11748 states have (on average 1.3009022812393598) internal successors, (15283), 11748 states have internal predecessors, (15283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:27,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11749 states to 11749 states and 15283 transitions. [2021-11-23 16:52:27,558 INFO L78 Accepts]: Start accepts. Automaton has 11749 states and 15283 transitions. Word has length 153 [2021-11-23 16:52:27,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:27,559 INFO L470 AbstractCegarLoop]: Abstraction has 11749 states and 15283 transitions. [2021-11-23 16:52:27,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 18.375) internal successors, (294), 15 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:27,559 INFO L276 IsEmpty]: Start isEmpty. Operand 11749 states and 15283 transitions. [2021-11-23 16:52:27,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-23 16:52:27,562 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:27,562 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:52:27,589 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-11-23 16:52:27,766 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (100)] Ended with exit code 0 [2021-11-23 16:52:27,973 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (99)] Ended with exit code 0 [2021-11-23 16:52:28,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:52:28,163 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:52:28,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:28,163 INFO L85 PathProgramCache]: Analyzing trace with hash -505951931, now seen corresponding path program 1 times [2021-11-23 16:52:28,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:28,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1555481875] [2021-11-23 16:52:28,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:28,164 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:28,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:28,166 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:28,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (102)] Waiting until timeout for monitored process [2021-11-23 16:52:28,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:28,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:52:28,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:28,714 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:28,714 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:52:28,714 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:52:28,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1555481875] [2021-11-23 16:52:28,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1555481875] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:52:28,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:52:28,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:52:28,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808663357] [2021-11-23 16:52:28,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:52:28,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:52:28,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:52:28,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:52:28,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:52:28,716 INFO L87 Difference]: Start difference. First operand 11749 states and 15283 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:29,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:29,819 INFO L93 Difference]: Finished difference Result 17141 states and 22317 transitions. [2021-11-23 16:52:29,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:52:29,820 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 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 154 [2021-11-23 16:52:29,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:29,828 INFO L225 Difference]: With dead ends: 17141 [2021-11-23 16:52:29,828 INFO L226 Difference]: Without dead ends: 6351 [2021-11-23 16:52:29,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 152 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 16:52:29,836 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 70 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 301 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 16:52:29,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 301 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:52:29,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6351 states. [2021-11-23 16:52:30,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6351 to 6349. [2021-11-23 16:52:30,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6349 states, 6348 states have (on average 1.2720541902961562) internal successors, (8075), 6348 states have internal predecessors, (8075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:30,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6349 states to 6349 states and 8075 transitions. [2021-11-23 16:52:30,875 INFO L78 Accepts]: Start accepts. Automaton has 6349 states and 8075 transitions. Word has length 154 [2021-11-23 16:52:30,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:30,875 INFO L470 AbstractCegarLoop]: Abstraction has 6349 states and 8075 transitions. [2021-11-23 16:52:30,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:30,875 INFO L276 IsEmpty]: Start isEmpty. Operand 6349 states and 8075 transitions. [2021-11-23 16:52:30,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-23 16:52:30,878 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:30,878 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:52:30,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (102)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:31,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:52:31,080 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:52:31,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:31,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1359981342, now seen corresponding path program 1 times [2021-11-23 16:52:31,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:31,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1115920790] [2021-11-23 16:52:31,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:31,082 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:31,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:31,083 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:31,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (103)] Waiting until timeout for monitored process [2021-11-23 16:52:31,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:31,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:52:31,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:33,300 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 16:52:33,300 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:52:33,300 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:52:33,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1115920790] [2021-11-23 16:52:33,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1115920790] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:52:33,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:52:33,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:52:33,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978534128] [2021-11-23 16:52:33,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:52:33,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 16:52:33,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:52:33,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 16:52:33,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:52:33,302 INFO L87 Difference]: Start difference. First operand 6349 states and 8075 transitions. Second operand has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:35,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:35,820 INFO L93 Difference]: Finished difference Result 17385 states and 22457 transitions. [2021-11-23 16:52:35,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 16:52:35,820 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 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 154 [2021-11-23 16:52:35,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:35,841 INFO L225 Difference]: With dead ends: 17385 [2021-11-23 16:52:35,841 INFO L226 Difference]: Without dead ends: 15587 [2021-11-23 16:52:35,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:52:35,847 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 571 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:52:35,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [571 Valid, 858 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 16:52:35,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15587 states. [2021-11-23 16:52:37,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15587 to 10005. [2021-11-23 16:52:37,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10005 states, 10004 states have (on average 1.2629948020791684) internal successors, (12635), 10004 states have internal predecessors, (12635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:37,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10005 states to 10005 states and 12635 transitions. [2021-11-23 16:52:37,610 INFO L78 Accepts]: Start accepts. Automaton has 10005 states and 12635 transitions. Word has length 154 [2021-11-23 16:52:37,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:37,611 INFO L470 AbstractCegarLoop]: Abstraction has 10005 states and 12635 transitions. [2021-11-23 16:52:37,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:37,611 INFO L276 IsEmpty]: Start isEmpty. Operand 10005 states and 12635 transitions. [2021-11-23 16:52:37,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-23 16:52:37,613 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:37,614 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:52:37,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (103)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:37,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:52:37,815 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:52:37,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:37,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1543852004, now seen corresponding path program 1 times [2021-11-23 16:52:37,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:37,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2071303596] [2021-11-23 16:52:37,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:37,817 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:37,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:37,818 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:37,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (104)] Waiting until timeout for monitored process [2021-11-23 16:52:38,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:38,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:52:38,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:40,073 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 16:52:40,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:52:40,074 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:52:40,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2071303596] [2021-11-23 16:52:40,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2071303596] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:52:40,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:52:40,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:52:40,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335765731] [2021-11-23 16:52:40,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:52:40,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 16:52:40,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:52:40,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 16:52:40,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:52:40,075 INFO L87 Difference]: Start difference. First operand 10005 states and 12635 transitions. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:42,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:42,363 INFO L93 Difference]: Finished difference Result 19181 states and 24705 transitions. [2021-11-23 16:52:42,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 16:52:42,363 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 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 154 [2021-11-23 16:52:42,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:42,384 INFO L225 Difference]: With dead ends: 19181 [2021-11-23 16:52:42,384 INFO L226 Difference]: Without dead ends: 13791 [2021-11-23 16:52:42,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:52:42,395 INFO L933 BasicCegarLoop]: 303 mSDtfsCounter, 743 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:52:42,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [743 Valid, 830 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 16:52:42,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13791 states. [2021-11-23 16:52:43,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13791 to 8209. [2021-11-23 16:52:43,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8209 states, 8208 states have (on average 1.2508528265107213) internal successors, (10267), 8208 states have internal predecessors, (10267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:43,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8209 states to 8209 states and 10267 transitions. [2021-11-23 16:52:43,950 INFO L78 Accepts]: Start accepts. Automaton has 8209 states and 10267 transitions. Word has length 154 [2021-11-23 16:52:43,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:43,950 INFO L470 AbstractCegarLoop]: Abstraction has 8209 states and 10267 transitions. [2021-11-23 16:52:43,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:43,950 INFO L276 IsEmpty]: Start isEmpty. Operand 8209 states and 10267 transitions. [2021-11-23 16:52:43,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-23 16:52:43,953 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:43,953 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:52:43,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (104)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:44,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:52:44,154 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:52:44,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:44,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1640020956, now seen corresponding path program 1 times [2021-11-23 16:52:44,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:44,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [243155226] [2021-11-23 16:52:44,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:44,155 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:44,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:44,156 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:44,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (105)] Waiting until timeout for monitored process [2021-11-23 16:52:44,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:44,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:52:44,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:46,478 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 16:52:46,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:52:46,478 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:52:46,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [243155226] [2021-11-23 16:52:46,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [243155226] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:52:46,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:52:46,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:52:46,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551352638] [2021-11-23 16:52:46,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:52:46,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 16:52:46,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:52:46,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 16:52:46,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:52:46,481 INFO L87 Difference]: Start difference. First operand 8209 states and 10267 transitions. Second operand has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:49,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:49,276 INFO L93 Difference]: Finished difference Result 17417 states and 22369 transitions. [2021-11-23 16:52:49,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 16:52:49,276 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 0 states have call successors, (0), 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 154 [2021-11-23 16:52:49,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:49,298 INFO L225 Difference]: With dead ends: 17417 [2021-11-23 16:52:49,298 INFO L226 Difference]: Without dead ends: 15619 [2021-11-23 16:52:49,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:52:49,305 INFO L933 BasicCegarLoop]: 309 mSDtfsCounter, 606 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 906 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:52:49,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [606 Valid, 906 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 16:52:49,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15619 states. [2021-11-23 16:52:51,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15619 to 10085. [2021-11-23 16:52:51,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10085 states, 10084 states have (on average 1.2505950019833398) internal successors, (12611), 10084 states have internal predecessors, (12611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:51,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10085 states to 10085 states and 12611 transitions. [2021-11-23 16:52:51,188 INFO L78 Accepts]: Start accepts. Automaton has 10085 states and 12611 transitions. Word has length 154 [2021-11-23 16:52:51,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:51,188 INFO L470 AbstractCegarLoop]: Abstraction has 10085 states and 12611 transitions. [2021-11-23 16:52:51,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:51,189 INFO L276 IsEmpty]: Start isEmpty. Operand 10085 states and 12611 transitions. [2021-11-23 16:52:51,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-23 16:52:51,191 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:51,192 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:52:51,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (105)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:51,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:52:51,393 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:52:51,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:51,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1445224158, now seen corresponding path program 1 times [2021-11-23 16:52:51,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:51,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [745014752] [2021-11-23 16:52:51,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:51,394 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:51,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:51,395 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:51,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (106)] Waiting until timeout for monitored process [2021-11-23 16:52:51,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:51,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:52:51,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:53,652 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 16:52:53,652 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:52:53,652 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:52:53,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [745014752] [2021-11-23 16:52:53,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [745014752] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:52:53,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:52:53,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:52:53,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245744432] [2021-11-23 16:52:53,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:52:53,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 16:52:53,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:52:53,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 16:52:53,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:52:53,654 INFO L87 Difference]: Start difference. First operand 10085 states and 12611 transitions. Second operand has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 7 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:56,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:56,817 INFO L93 Difference]: Finished difference Result 19269 states and 24681 transitions. [2021-11-23 16:52:56,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 16:52:56,818 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 7 states have internal predecessors, (152), 0 states have call successors, (0), 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 154 [2021-11-23 16:52:56,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:56,842 INFO L225 Difference]: With dead ends: 19269 [2021-11-23 16:52:56,842 INFO L226 Difference]: Without dead ends: 17471 [2021-11-23 16:52:56,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:52:56,847 INFO L933 BasicCegarLoop]: 310 mSDtfsCounter, 634 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 1057 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:52:56,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [634 Valid, 1057 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 16:52:56,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17471 states. [2021-11-23 16:52:58,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17471 to 11985. [2021-11-23 16:52:58,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11985 states, 11984 states have (on average 1.2505841121495327) internal successors, (14987), 11984 states have internal predecessors, (14987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:58,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11985 states to 11985 states and 14987 transitions. [2021-11-23 16:52:58,986 INFO L78 Accepts]: Start accepts. Automaton has 11985 states and 14987 transitions. Word has length 154 [2021-11-23 16:52:58,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:58,986 INFO L470 AbstractCegarLoop]: Abstraction has 11985 states and 14987 transitions. [2021-11-23 16:52:58,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 7 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:58,987 INFO L276 IsEmpty]: Start isEmpty. Operand 11985 states and 14987 transitions. [2021-11-23 16:52:58,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-23 16:52:58,990 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:58,990 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:52:59,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (106)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:59,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:52:59,191 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:52:59,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:59,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1623517284, now seen corresponding path program 1 times [2021-11-23 16:52:59,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:59,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1906454410] [2021-11-23 16:52:59,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:59,193 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:59,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:59,194 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:59,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (107)] Waiting until timeout for monitored process [2021-11-23 16:52:59,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:59,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:52:59,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:01,501 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 16:53:01,501 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:53:01,501 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:53:01,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1906454410] [2021-11-23 16:53:01,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1906454410] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:53:01,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:53:01,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:53:01,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702452507] [2021-11-23 16:53:01,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:53:01,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 16:53:01,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:53:01,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 16:53:01,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:53:01,504 INFO L87 Difference]: Start difference. First operand 11985 states and 14987 transitions. Second operand has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:05,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:53:05,280 INFO L93 Difference]: Finished difference Result 21225 states and 27121 transitions. [2021-11-23 16:53:05,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 16:53:05,281 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 0 states have call successors, (0), 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 154 [2021-11-23 16:53:05,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:53:05,307 INFO L225 Difference]: With dead ends: 21225 [2021-11-23 16:53:05,307 INFO L226 Difference]: Without dead ends: 19427 [2021-11-23 16:53:05,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:53:05,313 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 662 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 662 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:53:05,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [662 Valid, 831 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:53:05,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19427 states. [2021-11-23 16:53:07,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19427 to 13941. [2021-11-23 16:53:07,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13941 states, 13940 states have (on average 1.2501434720229556) internal successors, (17427), 13940 states have internal predecessors, (17427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:07,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13941 states to 13941 states and 17427 transitions. [2021-11-23 16:53:07,986 INFO L78 Accepts]: Start accepts. Automaton has 13941 states and 17427 transitions. Word has length 154 [2021-11-23 16:53:07,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:53:07,986 INFO L470 AbstractCegarLoop]: Abstraction has 13941 states and 17427 transitions. [2021-11-23 16:53:07,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:07,987 INFO L276 IsEmpty]: Start isEmpty. Operand 13941 states and 17427 transitions. [2021-11-23 16:53:07,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-23 16:53:07,991 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:53:07,991 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:53:08,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (107)] Forceful destruction successful, exit code 0 [2021-11-23 16:53:08,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:53:08,192 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:53:08,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:53:08,192 INFO L85 PathProgramCache]: Analyzing trace with hash -562441097, now seen corresponding path program 1 times [2021-11-23 16:53:08,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:53:08,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1455308632] [2021-11-23 16:53:08,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:08,193 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:53:08,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:53:08,194 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:53:08,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (108)] Waiting until timeout for monitored process [2021-11-23 16:53:08,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:08,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-23 16:53:08,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:19,538 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:19,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:53:26,690 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:26,690 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:53:26,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1455308632] [2021-11-23 16:53:26,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1455308632] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:53:26,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1926460725] [2021-11-23 16:53:26,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:26,691 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:53:26,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:53:26,692 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:53:26,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (109)] Waiting until timeout for monitored process [2021-11-23 16:53:27,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:27,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 16:53:27,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:37,953 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:37,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:53:41,901 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:41,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1926460725] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:53:41,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945071300] [2021-11-23 16:53:41,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:41,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:53:41,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:53:41,903 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:53:41,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-11-23 16:53:42,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:42,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-23 16:53:42,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:54:10,855 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:54:10,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:54:26,764 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:54:26,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945071300] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:54:26,764 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:54:26,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 18, 15, 34, 31] total 132 [2021-11-23 16:54:26,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353289608] [2021-11-23 16:54:26,765 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:54:26,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2021-11-23 16:54:26,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:54:26,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2021-11-23 16:54:26,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1293, Invalid=15999, Unknown=0, NotChecked=0, Total=17292 [2021-11-23 16:54:26,769 INFO L87 Difference]: Start difference. First operand 13941 states and 17427 transitions. Second operand has 132 states, 132 states have (on average 6.287878787878788) internal successors, (830), 132 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 16:54:55,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:54:55,120 INFO L93 Difference]: Finished difference Result 19556 states and 24384 transitions. [2021-11-23 16:54:55,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-23 16:54:55,121 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 6.287878787878788) internal successors, (830), 132 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) Word has length 155 [2021-11-23 16:54:55,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:54:55,142 INFO L225 Difference]: With dead ends: 19556 [2021-11-23 16:54:55,142 INFO L226 Difference]: Without dead ends: 15634 [2021-11-23 16:54:55,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 989 GetRequests, 805 SyntacticMatches, 9 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 9990 ImplicationChecksByTransitivity, 62.6s TimeCoverageRelationStatistics Valid=2935, Invalid=28217, Unknown=0, NotChecked=0, Total=31152 [2021-11-23 16:54:55,151 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 1570 mSDsluCounter, 6996 mSDsCounter, 0 mSdLazyCounter, 1742 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1570 SdHoareTripleChecker+Valid, 7137 SdHoareTripleChecker+Invalid, 2435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 613 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-23 16:54:55,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1570 Valid, 7137 Invalid, 2435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1742 Invalid, 0 Unknown, 613 Unchecked, 2.9s Time] [2021-11-23 16:54:55,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15634 states. [2021-11-23 16:54:57,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15634 to 14014. [2021-11-23 16:54:57,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14014 states, 14013 states have (on average 1.2491971740526653) internal successors, (17505), 14013 states have internal predecessors, (17505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:57,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14014 states to 14014 states and 17505 transitions. [2021-11-23 16:54:57,844 INFO L78 Accepts]: Start accepts. Automaton has 14014 states and 17505 transitions. Word has length 155 [2021-11-23 16:54:57,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:54:57,845 INFO L470 AbstractCegarLoop]: Abstraction has 14014 states and 17505 transitions. [2021-11-23 16:54:57,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 6.287878787878788) internal successors, (830), 132 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 16:54:57,845 INFO L276 IsEmpty]: Start isEmpty. Operand 14014 states and 17505 transitions. [2021-11-23 16:54:57,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-23 16:54:57,849 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:54:57,849 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:54:57,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (109)] Forceful destruction successful, exit code 0 [2021-11-23 16:54:58,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2021-11-23 16:54:58,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (108)] Ended with exit code 0 [2021-11-23 16:54:58,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:54:58,450 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:54:58,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:54:58,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1273869565, now seen corresponding path program 1 times [2021-11-23 16:54:58,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:54:58,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1551710390] [2021-11-23 16:54:58,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:54:58,451 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:54:58,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:54:58,453 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:54:58,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (111)] Waiting until timeout for monitored process [2021-11-23 16:54:58,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:54:58,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-23 16:54:58,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:55:09,724 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:55:09,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:55:13,102 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:55:13,102 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:55:13,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1551710390] [2021-11-23 16:55:13,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1551710390] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:55:13,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1602395882] [2021-11-23 16:55:13,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:55:13,103 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:55:13,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:55:13,104 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:55:13,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (112)] Waiting until timeout for monitored process [2021-11-23 16:55:13,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:55:13,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-23 16:55:13,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:55:38,099 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:55:38,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:55:53,791 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:55:53,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1602395882] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:55:53,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923345604] [2021-11-23 16:55:53,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:55:53,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:55:53,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:55:53,793 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:55:53,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-11-23 16:55:54,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:55:54,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-23 16:55:54,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:19,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:19,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:56:27,918 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:27,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923345604] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:56:27,919 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:56:27,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17, 33, 34, 27, 23] total 142 [2021-11-23 16:56:27,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420489152] [2021-11-23 16:56:27,920 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:56:27,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2021-11-23 16:56:27,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:56:27,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2021-11-23 16:56:27,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1632, Invalid=18390, Unknown=0, NotChecked=0, Total=20022 [2021-11-23 16:56:27,924 INFO L87 Difference]: Start difference. First operand 14014 states and 17505 transitions. Second operand has 142 states, 142 states have (on average 5.492957746478873) internal successors, (780), 142 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:56:50,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:56:50,983 INFO L93 Difference]: Finished difference Result 30872 states and 37451 transitions. [2021-11-23 16:56:50,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-23 16:56:50,984 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 5.492957746478873) internal successors, (780), 142 states have internal predecessors, (780), 0 states have call successors, (0), 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 155 [2021-11-23 16:56:50,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:56:51,022 INFO L225 Difference]: With dead ends: 30872 [2021-11-23 16:56:51,023 INFO L226 Difference]: Without dead ends: 26852 [2021-11-23 16:56:51,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 969 GetRequests, 798 SyntacticMatches, 2 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10486 ImplicationChecksByTransitivity, 57.9s TimeCoverageRelationStatistics Valid=2391, Invalid=26679, Unknown=0, NotChecked=0, Total=29070 [2021-11-23 16:56:51,032 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 569 mSDsluCounter, 10776 mSDsCounter, 0 mSdLazyCounter, 2507 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 11020 SdHoareTripleChecker+Invalid, 2865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 331 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-23 16:56:51,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [569 Valid, 11020 Invalid, 2865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 2507 Invalid, 0 Unknown, 331 Unchecked, 4.8s Time] [2021-11-23 16:56:51,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26852 states. [2021-11-23 16:56:54,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26852 to 13956. [2021-11-23 16:56:54,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13956 states, 13955 states have (on average 1.2500179147259047) internal successors, (17444), 13955 states have internal predecessors, (17444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:56:54,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13956 states to 13956 states and 17444 transitions. [2021-11-23 16:56:54,083 INFO L78 Accepts]: Start accepts. Automaton has 13956 states and 17444 transitions. Word has length 155 [2021-11-23 16:56:54,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:56:54,083 INFO L470 AbstractCegarLoop]: Abstraction has 13956 states and 17444 transitions. [2021-11-23 16:56:54,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 142 states have (on average 5.492957746478873) internal successors, (780), 142 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:56:54,083 INFO L276 IsEmpty]: Start isEmpty. Operand 13956 states and 17444 transitions. [2021-11-23 16:56:54,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-23 16:56:54,088 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:56:54,088 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:56:54,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2021-11-23 16:56:54,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (111)] Ended with exit code 0 [2021-11-23 16:56:54,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (112)] Ended with exit code 0 [2021-11-23 16:56:54,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:56:54,689 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:56:54,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:56:54,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1455177839, now seen corresponding path program 1 times [2021-11-23 16:56:54,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:56:54,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [351142730] [2021-11-23 16:56:54,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:54,691 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:56:54,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:56:54,693 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:56:54,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (114)] Waiting until timeout for monitored process [2021-11-23 16:56:55,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:55,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:56:55,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:56,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:56,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:56:57,815 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:57,816 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:56:57,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [351142730] [2021-11-23 16:56:57,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [351142730] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:56:57,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1436000917] [2021-11-23 16:56:57,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:57,816 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:56:57,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:56:57,819 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:56:57,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (115)] Waiting until timeout for monitored process [2021-11-23 16:56:58,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:58,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:56:58,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:57:00,654 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:00,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:57:01,491 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:01,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1436000917] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:57:01,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928661753] [2021-11-23 16:57:01,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:57:01,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:57:01,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:57:01,493 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:57:01,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-11-23 16:57:01,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:57:01,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:57:01,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:57:04,530 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:04,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:57:05,503 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:05,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928661753] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:57:05,504 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:57:05,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 16:57:05,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921117162] [2021-11-23 16:57:05,505 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:57:05,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 16:57:05,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:57:05,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 16:57:05,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 16:57:05,506 INFO L87 Difference]: Start difference. First operand 13956 states and 17444 transitions. Second operand has 16 states, 16 states have (on average 18.875) internal successors, (302), 15 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:57:09,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:57:09,971 INFO L93 Difference]: Finished difference Result 32508 states and 40326 transitions. [2021-11-23 16:57:09,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 16:57:09,972 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 18.875) internal successors, (302), 15 states have internal predecessors, (302), 0 states have call successors, (0), 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 155 [2021-11-23 16:57:09,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:57:09,999 INFO L225 Difference]: With dead ends: 32508 [2021-11-23 16:57:09,999 INFO L226 Difference]: Without dead ends: 19934 [2021-11-23 16:57:10,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 925 GetRequests, 910 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-11-23 16:57:10,009 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 257 mSDsluCounter, 1267 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 1487 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:57:10,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 1487 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 134 Invalid, 0 Unknown, 268 Unchecked, 0.1s Time] [2021-11-23 16:57:10,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19934 states. [2021-11-23 16:57:12,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19934 to 13760. [2021-11-23 16:57:12,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13760 states, 13759 states have (on average 1.2534341158514426) internal successors, (17246), 13759 states have internal predecessors, (17246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:57:13,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13760 states to 13760 states and 17246 transitions. [2021-11-23 16:57:13,012 INFO L78 Accepts]: Start accepts. Automaton has 13760 states and 17246 transitions. Word has length 155 [2021-11-23 16:57:13,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:57:13,012 INFO L470 AbstractCegarLoop]: Abstraction has 13760 states and 17246 transitions. [2021-11-23 16:57:13,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 18.875) internal successors, (302), 15 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:57:13,013 INFO L276 IsEmpty]: Start isEmpty. Operand 13760 states and 17246 transitions. [2021-11-23 16:57:13,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-23 16:57:13,016 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:57:13,016 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:57:13,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2021-11-23 16:57:13,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (114)] Forceful destruction successful, exit code 0 [2021-11-23 16:57:13,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (115)] Ended with exit code 0 [2021-11-23 16:57:13,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:57:13,617 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-23 16:57:13,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:57:13,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1105250981, now seen corresponding path program 1 times [2021-11-23 16:57:13,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:57:13,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [642264244] [2021-11-23 16:57:13,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:57:13,618 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:57:13,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:57:13,619 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:57:13,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (117)] Waiting until timeout for monitored process [2021-11-23 16:57:13,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:57:13,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-23 16:57:13,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:57:25,187 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:25,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:57:32,575 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:32,575 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:57:32,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [642264244] [2021-11-23 16:57:32,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [642264244] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:57:32,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [692250578] [2021-11-23 16:57:32,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:57:32,576 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:57:32,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:57:32,577 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:57:32,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (118)] Waiting until timeout for monitored process [2021-11-23 16:57:33,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:57:33,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 16:57:33,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:57:41,579 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:41,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:57:43,698 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:43,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [692250578] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:57:43,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077715444] [2021-11-23 16:57:43,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:57:43,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:57:43,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:57:43,699 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:57:43,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60db270-9072-4fdb-a34c-5ac7127b6050/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-11-23 16:57:43,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:57:43,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-23 16:57:43,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:58:08,697 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:58:08,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:58:24,075 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:58:24,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077715444] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:58:24,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:58:24,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 15, 13, 33, 31] total 127 [2021-11-23 16:58:24,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960315098] [2021-11-23 16:58:24,076 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:58:24,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2021-11-23 16:58:24,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:58:24,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2021-11-23 16:58:24,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=953, Invalid=15049, Unknown=0, NotChecked=0, Total=16002 [2021-11-23 16:58:24,080 INFO L87 Difference]: Start difference. First operand 13760 states and 17246 transitions. Second operand has 127 states, 127 states have (on average 6.606299212598425) internal successors, (839), 127 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)