./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/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_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/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_6db89313-fa37-4bea-9568-aed465aa569c/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 2d43a579fead76cada979bbaf2912558c79980eef82c3d2143337dc895995c75 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:14:56,550 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:14:56,554 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:14:56,619 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:14:56,620 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:14:56,624 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:14:56,627 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:14:56,631 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:14:56,635 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:14:56,641 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:14:56,642 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:14:56,645 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:14:56,645 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:14:56,648 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:14:56,650 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:14:56,656 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:14:56,662 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:14:56,663 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:14:56,666 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:14:56,675 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:14:56,677 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:14:56,679 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:14:56,683 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:14:56,684 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:14:56,695 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:14:56,696 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:14:56,696 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:14:56,699 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:14:56,699 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:14:56,701 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:14:56,702 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:14:56,703 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:14:56,705 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:14:56,707 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:14:56,708 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:14:56,709 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:14:56,710 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:14:56,710 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:14:56,710 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:14:56,711 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:14:56,713 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:14:56,714 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:14:56,765 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:14:56,766 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:14:56,767 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:14:56,767 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:14:56,776 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:14:56,776 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:14:56,777 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:14:56,777 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:14:56,777 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:14:56,778 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:14:56,779 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:14:56,779 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:14:56,780 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:14:56,780 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:14:56,780 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:14:56,781 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:14:56,781 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:14:56,782 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:14:56,783 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:14:56,783 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:14:56,784 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:14:56,784 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:14:56,784 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:14:56,785 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:14:56,785 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:14:56,785 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:14:56,787 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:14:56,788 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:14:56,788 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:14:56,788 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:14:56,789 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:14:56,789 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:14:56,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:14:56,790 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:14:56,790 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:14:56,791 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:14:56,791 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:14:56,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:14:56,792 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:14:56,792 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:14:56,792 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:14:56,793 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_6db89313-fa37-4bea-9568-aed465aa569c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2d43a579fead76cada979bbaf2912558c79980eef82c3d2143337dc895995c75 [2021-11-23 17:14:57,176 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:14:57,202 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:14:57,205 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:14:57,207 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:14:57,208 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:14:57,210 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-23 17:14:57,289 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/data/ee9064ae1/25bc4a24a5b543fea8a72acb005cf180/FLAGda1265c68 [2021-11-23 17:14:58,476 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:14:58,477 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-23 17:14:58,559 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/data/ee9064ae1/25bc4a24a5b543fea8a72acb005cf180/FLAGda1265c68 [2021-11-23 17:14:58,761 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/data/ee9064ae1/25bc4a24a5b543fea8a72acb005cf180 [2021-11-23 17:14:58,764 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:14:58,766 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:14:58,768 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:14:58,768 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:14:58,773 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:14:58,774 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:14:58" (1/1) ... [2021-11-23 17:14:58,776 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18cd0c89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:58, skipping insertion in model container [2021-11-23 17:14:58,777 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:14:58" (1/1) ... [2021-11-23 17:14:58,785 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:14:59,201 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:14:59,975 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_6db89313-fa37-4bea-9568-aed465aa569c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[19354,19367] [2021-11-23 17:15:01,942 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:15:01,968 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:15:02,115 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_6db89313-fa37-4bea-9568-aed465aa569c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[19354,19367] [2021-11-23 17:15:03,669 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:15:03,757 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:15:03,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:03 WrapperNode [2021-11-23 17:15:03,758 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:15:03,760 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:15:03,760 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:15:03,760 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:15:03,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:03" (1/1) ... [2021-11-23 17:15:03,886 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:03" (1/1) ... [2021-11-23 17:15:04,305 INFO L137 Inliner]: procedures = 25, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 18587 [2021-11-23 17:15:04,306 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:15:04,307 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:15:04,307 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:15:04,308 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:15:04,318 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:03" (1/1) ... [2021-11-23 17:15:04,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:03" (1/1) ... [2021-11-23 17:15:04,406 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:03" (1/1) ... [2021-11-23 17:15:04,408 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:03" (1/1) ... [2021-11-23 17:15:04,664 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:03" (1/1) ... [2021-11-23 17:15:04,800 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:03" (1/1) ... [2021-11-23 17:15:04,875 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:03" (1/1) ... [2021-11-23 17:15:04,960 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:15:04,961 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:15:04,961 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:15:04,961 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:15:04,962 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:03" (1/1) ... [2021-11-23 17:15:04,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:15:04,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:15:05,015 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:15:05,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:15:05,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:15:05,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:15:05,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:15:05,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:15:06,080 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:15:06,083 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:15:15,052 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:15:15,233 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 17:15:15,239 INFO L158 Benchmark]: Toolchain (without parser) took 16471.42ms. Allocated memory was 98.6MB in the beginning and 608.2MB in the end (delta: 509.6MB). Free memory was 56.3MB in the beginning and 423.8MB in the end (delta: -367.5MB). Peak memory consumption was 391.7MB. Max. memory is 16.1GB. [2021-11-23 17:15:15,239 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 98.6MB. Free memory is still 72.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:15:15,241 INFO L158 Benchmark]: CACSL2BoogieTranslator took 4990.83ms. Allocated memory was 98.6MB in the beginning and 167.8MB in the end (delta: 69.2MB). Free memory was 56.3MB in the beginning and 92.1MB in the end (delta: -35.7MB). Peak memory consumption was 79.9MB. Max. memory is 16.1GB. [2021-11-23 17:15:15,242 INFO L158 Benchmark]: Boogie Procedure Inliner took 546.98ms. Allocated memory is still 167.8MB. Free memory was 92.1MB in the beginning and 59.8MB in the end (delta: 32.3MB). Peak memory consumption was 62.0MB. Max. memory is 16.1GB. [2021-11-23 17:15:15,243 INFO L158 Benchmark]: Boogie Preprocessor took 652.75ms. Allocated memory was 167.8MB in the beginning and 335.5MB in the end (delta: 167.8MB). Free memory was 59.8MB in the beginning and 204.3MB in the end (delta: -144.5MB). Peak memory consumption was 31.2MB. Max. memory is 16.1GB. [2021-11-23 17:15:15,244 INFO L158 Benchmark]: RCFGBuilder took 10275.20ms. Allocated memory was 335.5MB in the beginning and 608.2MB in the end (delta: 272.6MB). Free memory was 204.3MB in the beginning and 423.8MB in the end (delta: -219.5MB). Peak memory consumption was 302.5MB. Max. memory is 16.1GB. [2021-11-23 17:15:15,249 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 98.6MB. Free memory is still 72.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 4990.83ms. Allocated memory was 98.6MB in the beginning and 167.8MB in the end (delta: 69.2MB). Free memory was 56.3MB in the beginning and 92.1MB in the end (delta: -35.7MB). Peak memory consumption was 79.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 546.98ms. Allocated memory is still 167.8MB. Free memory was 92.1MB in the beginning and 59.8MB in the end (delta: 32.3MB). Peak memory consumption was 62.0MB. Max. memory is 16.1GB. * Boogie Preprocessor took 652.75ms. Allocated memory was 167.8MB in the beginning and 335.5MB in the end (delta: 167.8MB). Free memory was 59.8MB in the beginning and 204.3MB in the end (delta: -144.5MB). Peak memory consumption was 31.2MB. Max. memory is 16.1GB. * RCFGBuilder took 10275.20ms. Allocated memory was 335.5MB in the beginning and 608.2MB in the end (delta: 272.6MB). Free memory was 204.3MB in the beginning and 423.8MB in the end (delta: -219.5MB). Peak memory consumption was 302.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:15:15,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/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_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/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_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/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_6db89313-fa37-4bea-9568-aed465aa569c/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 2d43a579fead76cada979bbaf2912558c79980eef82c3d2143337dc895995c75 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:15:18,192 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:15:18,197 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:15:18,254 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:15:18,255 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:15:18,257 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:15:18,259 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:15:18,262 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:15:18,265 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:15:18,266 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:15:18,268 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:15:18,269 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:15:18,270 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:15:18,271 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:15:18,273 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:15:18,276 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:15:18,277 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:15:18,278 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:15:18,281 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:15:18,284 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:15:18,287 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:15:18,288 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:15:18,290 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:15:18,292 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:15:18,296 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:15:18,297 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:15:18,297 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:15:18,298 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:15:18,299 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:15:18,300 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:15:18,301 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:15:18,302 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:15:18,303 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:15:18,304 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:15:18,322 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:15:18,323 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:15:18,324 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:15:18,325 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:15:18,325 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:15:18,327 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:15:18,328 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:15:18,337 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:15:18,394 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:15:18,395 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:15:18,395 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:15:18,396 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:15:18,397 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:15:18,397 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:15:18,397 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:15:18,398 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:15:18,398 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:15:18,398 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:15:18,400 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:15:18,400 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:15:18,402 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:15:18,402 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:15:18,402 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:15:18,403 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:15:18,403 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:15:18,403 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:15:18,404 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:15:18,404 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:15:18,404 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:15:18,404 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:15:18,405 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:15:18,405 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:15:18,405 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:15:18,406 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:15:18,406 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:15:18,406 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:15:18,407 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:15:18,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:15:18,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:15:18,408 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:15:18,408 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:15:18,408 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:15:18,409 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:15:18,409 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:15:18,409 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:15:18,410 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:15:18,410 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_6db89313-fa37-4bea-9568-aed465aa569c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2d43a579fead76cada979bbaf2912558c79980eef82c3d2143337dc895995c75 [2021-11-23 17:15:18,924 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:15:18,955 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:15:18,958 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:15:18,960 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:15:18,961 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:15:18,962 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-23 17:15:19,048 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/data/578192e53/809838f3d7f347688fa92ccf73838393/FLAG8d8fc0377 [2021-11-23 17:15:20,274 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:15:20,274 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-23 17:15:20,328 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/data/578192e53/809838f3d7f347688fa92ccf73838393/FLAG8d8fc0377 [2021-11-23 17:15:20,504 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/data/578192e53/809838f3d7f347688fa92ccf73838393 [2021-11-23 17:15:20,508 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:15:20,511 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:15:20,516 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:15:20,516 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:15:20,520 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:15:20,523 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:15:20" (1/1) ... [2021-11-23 17:15:20,525 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ae5b7cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:20, skipping insertion in model container [2021-11-23 17:15:20,525 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:15:20" (1/1) ... [2021-11-23 17:15:20,534 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:15:20,926 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:15:21,718 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_6db89313-fa37-4bea-9568-aed465aa569c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[19354,19367] [2021-11-23 17:15:24,291 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:15:24,336 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:15:24,467 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_6db89313-fa37-4bea-9568-aed465aa569c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[19354,19367] [2021-11-23 17:15:26,246 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:15:26,293 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:15:26,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:26 WrapperNode [2021-11-23 17:15:26,294 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:15:26,295 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:15:26,295 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:15:26,295 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:15:26,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:26" (1/1) ... [2021-11-23 17:15:26,434 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:26" (1/1) ... [2021-11-23 17:15:26,824 INFO L137 Inliner]: procedures = 25, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 18572 [2021-11-23 17:15:26,824 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:15:26,826 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:15:26,826 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:15:26,826 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:15:26,837 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:26" (1/1) ... [2021-11-23 17:15:26,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:26" (1/1) ... [2021-11-23 17:15:26,913 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:26" (1/1) ... [2021-11-23 17:15:26,926 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:26" (1/1) ... [2021-11-23 17:15:27,275 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:26" (1/1) ... [2021-11-23 17:15:27,368 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:26" (1/1) ... [2021-11-23 17:15:27,453 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:26" (1/1) ... [2021-11-23 17:15:27,531 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:15:27,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:15:27,533 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:15:27,533 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:15:27,534 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:26" (1/1) ... [2021-11-23 17:15:27,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:15:27,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:15:27,573 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:15:27,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:15:27,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:15:27,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:15:27,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:15:27,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:15:28,527 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:15:28,530 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:15:42,796 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:15:42,862 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:15:42,862 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 17:15:42,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:15:42 BoogieIcfgContainer [2021-11-23 17:15:42,869 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:15:42,872 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:15:42,872 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:15:42,876 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:15:42,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:15:20" (1/3) ... [2021-11-23 17:15:42,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1bdf02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:15:42, skipping insertion in model container [2021-11-23 17:15:42,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:26" (2/3) ... [2021-11-23 17:15:42,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1bdf02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:15:42, skipping insertion in model container [2021-11-23 17:15:42,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:15:42" (3/3) ... [2021-11-23 17:15:42,880 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-23 17:15:42,886 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:15:42,887 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:15:42,963 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:15:42,972 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 17:15:42,972 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:15:43,058 INFO L276 IsEmpty]: Start isEmpty. Operand has 2868 states, 2866 states have (on average 1.9089323098394975) internal successors, (5471), 2867 states have internal predecessors, (5471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:43,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-23 17:15:43,101 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:15:43,102 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] [2021-11-23 17:15:43,103 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:15:43,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:15:43,109 INFO L85 PathProgramCache]: Analyzing trace with hash -2083361813, now seen corresponding path program 1 times [2021-11-23 17:15:43,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:15:43,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2073168802] [2021-11-23 17:15:43,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:43,129 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:15:43,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:15:43,137 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:15:43,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:15:44,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:44,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 674 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:15:44,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:45,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:15:45,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:15:45,215 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:15:45,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2073168802] [2021-11-23 17:15:45,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2073168802] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:15:45,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:15:45,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:15:45,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595161668] [2021-11-23 17:15:45,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:15:45,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:15:45,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:15:45,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:15:45,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:15:45,284 INFO L87 Difference]: Start difference. First operand has 2868 states, 2866 states have (on average 1.9089323098394975) internal successors, (5471), 2867 states have internal predecessors, (5471), 0 states have call successors, (0), 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 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:47,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:15:47,830 INFO L93 Difference]: Finished difference Result 3220 states and 6057 transitions. [2021-11-23 17:15:47,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:15:47,833 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2021-11-23 17:15:47,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:15:47,872 INFO L225 Difference]: With dead ends: 3220 [2021-11-23 17:15:47,872 INFO L226 Difference]: Without dead ends: 2037 [2021-11-23 17:15:47,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 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 17:15:47,890 INFO L933 BasicCegarLoop]: 3862 mSDtfsCounter, 139 mSDsluCounter, 2643 mSDsCounter, 0 mSdLazyCounter, 1189 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 6505 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:15:47,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 6505 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1189 Invalid, 0 Unknown, 15 Unchecked, 2.3s Time] [2021-11-23 17:15:47,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2037 states. [2021-11-23 17:15:48,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2037 to 2037. [2021-11-23 17:15:48,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2037 states, 2036 states have (on average 1.2824165029469548) internal successors, (2611), 2036 states have internal predecessors, (2611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:48,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2037 states to 2037 states and 2611 transitions. [2021-11-23 17:15:48,158 INFO L78 Accepts]: Start accepts. Automaton has 2037 states and 2611 transitions. Word has length 78 [2021-11-23 17:15:48,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:15:48,159 INFO L470 AbstractCegarLoop]: Abstraction has 2037 states and 2611 transitions. [2021-11-23 17:15:48,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:48,160 INFO L276 IsEmpty]: Start isEmpty. Operand 2037 states and 2611 transitions. [2021-11-23 17:15:48,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 17:15:48,169 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:15:48,170 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 17:15:48,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:15:48,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:15:48,388 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:15:48,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:15:48,390 INFO L85 PathProgramCache]: Analyzing trace with hash 696230651, now seen corresponding path program 1 times [2021-11-23 17:15:48,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:15:48,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [531195852] [2021-11-23 17:15:48,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:48,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:15:48,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:15:48,396 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:15:48,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:15:49,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:49,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:15:49,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:49,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:15:49,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:15:49,922 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:15:49,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [531195852] [2021-11-23 17:15:49,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [531195852] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:15:49,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:15:49,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:15:49,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636441614] [2021-11-23 17:15:49,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:15:49,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:15:49,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:15:49,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:15:49,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:15:49,928 INFO L87 Difference]: Start difference. First operand 2037 states and 2611 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 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 17:15:51,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:15:51,791 INFO L93 Difference]: Finished difference Result 2652 states and 3472 transitions. [2021-11-23 17:15:51,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:15:51,792 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 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 17:15:51,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:15:51,809 INFO L225 Difference]: With dead ends: 2652 [2021-11-23 17:15:51,809 INFO L226 Difference]: Without dead ends: 2042 [2021-11-23 17:15:51,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:15:51,813 INFO L933 BasicCegarLoop]: 2601 mSDtfsCounter, 50 mSDsluCounter, 1609 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 4210 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:15:51,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 4210 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 985 Invalid, 0 Unknown, 14 Unchecked, 1.7s Time] [2021-11-23 17:15:51,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2042 states. [2021-11-23 17:15:51,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2042 to 2041. [2021-11-23 17:15:51,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2041 states, 2040 states have (on average 1.2823529411764707) internal successors, (2616), 2040 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:51,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2041 states to 2041 states and 2616 transitions. [2021-11-23 17:15:51,905 INFO L78 Accepts]: Start accepts. Automaton has 2041 states and 2616 transitions. Word has length 79 [2021-11-23 17:15:51,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:15:51,906 INFO L470 AbstractCegarLoop]: Abstraction has 2041 states and 2616 transitions. [2021-11-23 17:15:51,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 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 17:15:51,907 INFO L276 IsEmpty]: Start isEmpty. Operand 2041 states and 2616 transitions. [2021-11-23 17:15:51,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-23 17:15:51,915 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:15:51,915 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 17:15:51,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:15:52,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:15:52,133 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:15:52,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:15:52,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1086850142, now seen corresponding path program 1 times [2021-11-23 17:15:52,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:15:52,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1188388468] [2021-11-23 17:15:52,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:52,136 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:15:52,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:15:52,139 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:15:52,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:15:52,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:53,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:15:53,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:53,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:15:53,617 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:15:53,619 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:15:53,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1188388468] [2021-11-23 17:15:53,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1188388468] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:15:53,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:15:53,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:15:53,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515200523] [2021-11-23 17:15:53,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:15:53,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:15:53,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:15:53,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:15:53,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:15:53,630 INFO L87 Difference]: Start difference. First operand 2041 states and 2616 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 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 17:15:55,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:15:55,452 INFO L93 Difference]: Finished difference Result 2473 states and 3252 transitions. [2021-11-23 17:15:55,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:15:55,453 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 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 17:15:55,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:15:55,467 INFO L225 Difference]: With dead ends: 2473 [2021-11-23 17:15:55,468 INFO L226 Difference]: Without dead ends: 2048 [2021-11-23 17:15:55,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:15:55,471 INFO L933 BasicCegarLoop]: 2597 mSDtfsCounter, 50 mSDsluCounter, 1621 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 4218 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:15:55,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 4218 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 981 Invalid, 0 Unknown, 18 Unchecked, 1.7s Time] [2021-11-23 17:15:55,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2048 states. [2021-11-23 17:15:55,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2048 to 2046. [2021-11-23 17:15:55,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2046 states, 2045 states have (on average 1.282640586797066) internal successors, (2623), 2045 states have internal predecessors, (2623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:55,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2046 states to 2046 states and 2623 transitions. [2021-11-23 17:15:55,536 INFO L78 Accepts]: Start accepts. Automaton has 2046 states and 2623 transitions. Word has length 80 [2021-11-23 17:15:55,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:15:55,537 INFO L470 AbstractCegarLoop]: Abstraction has 2046 states and 2623 transitions. [2021-11-23 17:15:55,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 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 17:15:55,537 INFO L276 IsEmpty]: Start isEmpty. Operand 2046 states and 2623 transitions. [2021-11-23 17:15:55,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-23 17:15:55,543 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:15:55,544 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 17:15:55,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-23 17:15:55,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:15:55,759 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:15:55,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:15:55,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1570606344, now seen corresponding path program 1 times [2021-11-23 17:15:55,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:15:55,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1124250981] [2021-11-23 17:15:55,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:55,761 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:15:55,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:15:55,763 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:15:55,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:15:56,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:56,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:15:56,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:56,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:15:56,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:15:56,765 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:15:56,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1124250981] [2021-11-23 17:15:56,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1124250981] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:15:56,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:15:56,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:15:56,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768541879] [2021-11-23 17:15:56,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:15:56,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:15:56,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:15:56,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:15:56,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:15:56,768 INFO L87 Difference]: Start difference. First operand 2046 states and 2623 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 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 17:15:56,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:15:56,954 INFO L93 Difference]: Finished difference Result 3986 states and 5184 transitions. [2021-11-23 17:15:56,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:15:56,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 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 17:15:56,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:15:56,969 INFO L225 Difference]: With dead ends: 3986 [2021-11-23 17:15:56,969 INFO L226 Difference]: Without dead ends: 1989 [2021-11-23 17:15:56,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:15:56,975 INFO L933 BasicCegarLoop]: 2250 mSDtfsCounter, 2218 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2218 SdHoareTripleChecker+Valid, 2587 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:15:56,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2218 Valid, 2587 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:15:56,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1989 states. [2021-11-23 17:15:57,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1989 to 1987. [2021-11-23 17:15:57,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1987 states, 1986 states have (on average 1.3152064451158108) internal successors, (2612), 1986 states have internal predecessors, (2612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:57,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1987 states to 1987 states and 2612 transitions. [2021-11-23 17:15:57,043 INFO L78 Accepts]: Start accepts. Automaton has 1987 states and 2612 transitions. Word has length 80 [2021-11-23 17:15:57,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:15:57,044 INFO L470 AbstractCegarLoop]: Abstraction has 1987 states and 2612 transitions. [2021-11-23 17:15:57,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 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 17:15:57,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1987 states and 2612 transitions. [2021-11-23 17:15:57,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-23 17:15:57,050 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:15:57,051 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:15:57,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:15:57,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:15:57,268 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:15:57,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:15:57,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1502753322, now seen corresponding path program 1 times [2021-11-23 17:15:57,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:15:57,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1301906893] [2021-11-23 17:15:57,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:57,270 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:15:57,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:15:57,272 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:15:57,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:15:57,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:57,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:15:57,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:58,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:15:58,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:15:58,540 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:15:58,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1301906893] [2021-11-23 17:15:58,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1301906893] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:15:58,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:15:58,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:15:58,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064614598] [2021-11-23 17:15:58,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:15:58,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:15:58,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:15:58,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:15:58,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:15:58,547 INFO L87 Difference]: Start difference. First operand 1987 states and 2612 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 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 17:16:00,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:00,509 INFO L93 Difference]: Finished difference Result 2545 states and 3466 transitions. [2021-11-23 17:16:00,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:16:00,510 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 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 17:16:00,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:00,522 INFO L225 Difference]: With dead ends: 2545 [2021-11-23 17:16:00,522 INFO L226 Difference]: Without dead ends: 1714 [2021-11-23 17:16:00,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:16:00,525 INFO L933 BasicCegarLoop]: 1921 mSDtfsCounter, 32 mSDsluCounter, 2333 mSDsCounter, 0 mSdLazyCounter, 1460 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 4254 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:00,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 4254 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1460 Invalid, 0 Unknown, 14 Unchecked, 1.8s Time] [2021-11-23 17:16:00,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2021-11-23 17:16:00,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1714. [2021-11-23 17:16:00,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1714 states, 1713 states have (on average 1.3274956217162872) internal successors, (2274), 1713 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:00,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1714 states to 1714 states and 2274 transitions. [2021-11-23 17:16:00,583 INFO L78 Accepts]: Start accepts. Automaton has 1714 states and 2274 transitions. Word has length 80 [2021-11-23 17:16:00,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:00,584 INFO L470 AbstractCegarLoop]: Abstraction has 1714 states and 2274 transitions. [2021-11-23 17:16:00,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 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 17:16:00,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1714 states and 2274 transitions. [2021-11-23 17:16:00,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-23 17:16:00,589 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:00,590 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 17:16:00,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:00,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:16:00,803 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:00,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:00,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1320786739, now seen corresponding path program 1 times [2021-11-23 17:16:00,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:00,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [50712271] [2021-11-23 17:16:00,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:00,805 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:00,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:00,806 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:00,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:16:01,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:01,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:16:01,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:01,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:01,725 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:16:01,725 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:01,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [50712271] [2021-11-23 17:16:01,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [50712271] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:16:01,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:16:01,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:16:01,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970691314] [2021-11-23 17:16:01,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:16:01,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:16:01,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:01,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:16:01,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:16:01,729 INFO L87 Difference]: Start difference. First operand 1714 states and 2274 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 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 17:16:01,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:01,936 INFO L93 Difference]: Finished difference Result 3652 states and 4938 transitions. [2021-11-23 17:16:01,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:16:01,937 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 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 17:16:01,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:01,951 INFO L225 Difference]: With dead ends: 3652 [2021-11-23 17:16:01,952 INFO L226 Difference]: Without dead ends: 1994 [2021-11-23 17:16:01,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:16:01,962 INFO L933 BasicCegarLoop]: 1790 mSDtfsCounter, 1760 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1760 SdHoareTripleChecker+Valid, 2122 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:01,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1760 Valid, 2122 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:16:01,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1994 states. [2021-11-23 17:16:02,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1994 to 1992. [2021-11-23 17:16:02,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1992 states, 1991 states have (on average 1.3666499246609745) internal successors, (2721), 1991 states have internal predecessors, (2721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:02,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1992 states to 1992 states and 2721 transitions. [2021-11-23 17:16:02,041 INFO L78 Accepts]: Start accepts. Automaton has 1992 states and 2721 transitions. Word has length 81 [2021-11-23 17:16:02,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:02,042 INFO L470 AbstractCegarLoop]: Abstraction has 1992 states and 2721 transitions. [2021-11-23 17:16:02,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 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 17:16:02,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1992 states and 2721 transitions. [2021-11-23 17:16:02,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-23 17:16:02,049 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:02,049 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 17:16:02,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:02,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:16:02,263 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:02,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:02,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1535071209, now seen corresponding path program 1 times [2021-11-23 17:16:02,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:02,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1857176088] [2021-11-23 17:16:02,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:02,264 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:02,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:02,265 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:02,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:16:02,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:02,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:16:02,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:04,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:04,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:16:04,553 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:04,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1857176088] [2021-11-23 17:16:04,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1857176088] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:16:04,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:16:04,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:16:04,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821436967] [2021-11-23 17:16:04,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:16:04,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 17:16:04,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:04,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 17:16:04,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:16:04,558 INFO L87 Difference]: Start difference. First operand 1992 states and 2721 transitions. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 17:16:05,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:05,384 INFO L93 Difference]: Finished difference Result 4077 states and 5872 transitions. [2021-11-23 17:16:05,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:16:05,386 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 17:16:05,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:05,411 INFO L225 Difference]: With dead ends: 4077 [2021-11-23 17:16:05,413 INFO L226 Difference]: Without dead ends: 3135 [2021-11-23 17:16:05,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:16:05,421 INFO L933 BasicCegarLoop]: 2116 mSDtfsCounter, 2052 mSDsluCounter, 5014 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2052 SdHoareTripleChecker+Valid, 7130 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 661 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:05,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2052 Valid, 7130 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 205 Invalid, 0 Unknown, 661 Unchecked, 0.7s Time] [2021-11-23 17:16:05,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3135 states. [2021-11-23 17:16:05,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3135 to 1982. [2021-11-23 17:16:05,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1982 states, 1981 states have (on average 1.3669863705199394) internal successors, (2708), 1981 states have internal predecessors, (2708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:05,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 2708 transitions. [2021-11-23 17:16:05,583 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 2708 transitions. Word has length 81 [2021-11-23 17:16:05,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:05,584 INFO L470 AbstractCegarLoop]: Abstraction has 1982 states and 2708 transitions. [2021-11-23 17:16:05,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 17:16:05,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 2708 transitions. [2021-11-23 17:16:05,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-23 17:16:05,590 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:05,590 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 17:16:05,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:05,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:16:05,811 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:05,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:05,812 INFO L85 PathProgramCache]: Analyzing trace with hash -339679213, now seen corresponding path program 1 times [2021-11-23 17:16:05,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:05,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [273905782] [2021-11-23 17:16:05,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:05,813 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:05,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:05,814 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:05,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:16:06,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:06,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:16:06,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:07,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:07,061 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:16:07,062 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:07,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [273905782] [2021-11-23 17:16:07,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [273905782] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:16:07,062 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:16:07,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:16:07,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675472116] [2021-11-23 17:16:07,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:16:07,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:16:07,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:07,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:16:07,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:16:07,065 INFO L87 Difference]: Start difference. First operand 1982 states and 2708 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 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 17:16:08,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:08,498 INFO L93 Difference]: Finished difference Result 2926 states and 4148 transitions. [2021-11-23 17:16:08,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:16:08,499 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 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 17:16:08,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:08,512 INFO L225 Difference]: With dead ends: 2926 [2021-11-23 17:16:08,513 INFO L226 Difference]: Without dead ends: 1991 [2021-11-23 17:16:08,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:16:08,516 INFO L933 BasicCegarLoop]: 1784 mSDtfsCounter, 32 mSDsluCounter, 3030 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 4814 SdHoareTripleChecker+Invalid, 1527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 759 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:08,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 4814 Invalid, 1527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 767 Invalid, 0 Unknown, 759 Unchecked, 1.3s Time] [2021-11-23 17:16:08,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1991 states. [2021-11-23 17:16:08,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1991 to 1989. [2021-11-23 17:16:08,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1989 states, 1988 states have (on average 1.3667002012072436) internal successors, (2717), 1988 states have internal predecessors, (2717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:08,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1989 states to 1989 states and 2717 transitions. [2021-11-23 17:16:08,633 INFO L78 Accepts]: Start accepts. Automaton has 1989 states and 2717 transitions. Word has length 81 [2021-11-23 17:16:08,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:08,634 INFO L470 AbstractCegarLoop]: Abstraction has 1989 states and 2717 transitions. [2021-11-23 17:16:08,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 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 17:16:08,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1989 states and 2717 transitions. [2021-11-23 17:16:08,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-23 17:16:08,639 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:08,640 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 17:16:08,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:08,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:16:08,857 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:08,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:08,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1795143322, now seen corresponding path program 1 times [2021-11-23 17:16:08,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:08,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [351921808] [2021-11-23 17:16:08,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:08,859 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:08,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:08,861 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:08,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:16:09,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:09,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:16:09,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:10,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:10,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:16:10,006 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:10,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [351921808] [2021-11-23 17:16:10,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [351921808] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:16:10,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:16:10,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:16:10,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777268233] [2021-11-23 17:16:10,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:16:10,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:16:10,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:10,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:16:10,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:16:10,010 INFO L87 Difference]: Start difference. First operand 1989 states and 2717 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 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 17:16:11,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:11,691 INFO L93 Difference]: Finished difference Result 2942 states and 4166 transitions. [2021-11-23 17:16:11,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:16:11,691 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 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 17:16:11,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:11,708 INFO L225 Difference]: With dead ends: 2942 [2021-11-23 17:16:11,708 INFO L226 Difference]: Without dead ends: 1990 [2021-11-23 17:16:11,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:16:11,714 INFO L933 BasicCegarLoop]: 1787 mSDtfsCounter, 30 mSDsluCounter, 3207 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 4994 SdHoareTripleChecker+Invalid, 2087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 713 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:11,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 4994 Invalid, 2087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1373 Invalid, 0 Unknown, 713 Unchecked, 1.5s Time] [2021-11-23 17:16:11,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1990 states. [2021-11-23 17:16:11,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1990 to 1990. [2021-11-23 17:16:11,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1990 states, 1989 states have (on average 1.3665158371040724) internal successors, (2718), 1989 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:11,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1990 states to 1990 states and 2718 transitions. [2021-11-23 17:16:11,819 INFO L78 Accepts]: Start accepts. Automaton has 1990 states and 2718 transitions. Word has length 81 [2021-11-23 17:16:11,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:11,819 INFO L470 AbstractCegarLoop]: Abstraction has 1990 states and 2718 transitions. [2021-11-23 17:16:11,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 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 17:16:11,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1990 states and 2718 transitions. [2021-11-23 17:16:11,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-23 17:16:11,825 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:11,826 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 17:16:11,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:12,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:16:12,041 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:12,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:12,042 INFO L85 PathProgramCache]: Analyzing trace with hash 795757437, now seen corresponding path program 1 times [2021-11-23 17:16:12,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:12,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [129489216] [2021-11-23 17:16:12,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:12,043 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:12,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:12,044 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:12,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 17:16:12,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:12,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 674 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:16:12,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:13,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:13,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:16:13,255 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:13,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [129489216] [2021-11-23 17:16:13,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [129489216] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:16:13,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:16:13,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:16:13,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121447334] [2021-11-23 17:16:13,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:16:13,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:16:13,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:13,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:16:13,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:16:13,257 INFO L87 Difference]: Start difference. First operand 1990 states and 2718 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 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 17:16:14,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:14,117 INFO L93 Difference]: Finished difference Result 2922 states and 4141 transitions. [2021-11-23 17:16:14,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:16:14,118 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 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 17:16:14,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:14,128 INFO L225 Difference]: With dead ends: 2922 [2021-11-23 17:16:14,129 INFO L226 Difference]: Without dead ends: 1902 [2021-11-23 17:16:14,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:16:14,132 INFO L933 BasicCegarLoop]: 1680 mSDtfsCounter, 47 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 2728 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:14,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 2728 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 629 Invalid, 0 Unknown, 16 Unchecked, 0.8s Time] [2021-11-23 17:16:14,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1902 states. [2021-11-23 17:16:14,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1902 to 1902. [2021-11-23 17:16:14,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1902 states, 1901 states have (on average 1.372435560231457) internal successors, (2609), 1901 states have internal predecessors, (2609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:14,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 2609 transitions. [2021-11-23 17:16:14,236 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 2609 transitions. Word has length 81 [2021-11-23 17:16:14,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:14,236 INFO L470 AbstractCegarLoop]: Abstraction has 1902 states and 2609 transitions. [2021-11-23 17:16:14,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 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 17:16:14,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 2609 transitions. [2021-11-23 17:16:14,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-23 17:16:14,242 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:14,242 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 17:16:14,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:14,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:16:14,463 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:14,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:14,463 INFO L85 PathProgramCache]: Analyzing trace with hash 2041428531, now seen corresponding path program 1 times [2021-11-23 17:16:14,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:14,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [710640516] [2021-11-23 17:16:14,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:14,464 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:14,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:14,466 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:14,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 17:16:15,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:15,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:16:15,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:15,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:15,790 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:16:15,790 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:15,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [710640516] [2021-11-23 17:16:15,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [710640516] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:16:15,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:16:15,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:16:15,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692740433] [2021-11-23 17:16:15,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:16:15,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:16:15,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:15,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:16:15,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:16:15,794 INFO L87 Difference]: Start difference. First operand 1902 states and 2609 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 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 17:16:17,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:17,007 INFO L93 Difference]: Finished difference Result 2834 states and 4032 transitions. [2021-11-23 17:16:17,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:16:17,008 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 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 17:16:17,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:17,021 INFO L225 Difference]: With dead ends: 2834 [2021-11-23 17:16:17,021 INFO L226 Difference]: Without dead ends: 1814 [2021-11-23 17:16:17,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:16:17,025 INFO L933 BasicCegarLoop]: 1571 mSDtfsCounter, 36 mSDsluCounter, 1898 mSDsCounter, 0 mSdLazyCounter, 1198 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 3469 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:17,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 3469 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1198 Invalid, 0 Unknown, 16 Unchecked, 1.1s Time] [2021-11-23 17:16:17,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1814 states. [2021-11-23 17:16:17,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1814 to 1814. [2021-11-23 17:16:17,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 1.3789299503585217) internal successors, (2500), 1813 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:17,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 2500 transitions. [2021-11-23 17:16:17,122 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 2500 transitions. Word has length 81 [2021-11-23 17:16:17,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:17,122 INFO L470 AbstractCegarLoop]: Abstraction has 1814 states and 2500 transitions. [2021-11-23 17:16:17,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 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 17:16:17,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 2500 transitions. [2021-11-23 17:16:17,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-23 17:16:17,128 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:17,128 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] [2021-11-23 17:16:17,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:17,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:16:17,343 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:17,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:17,343 INFO L85 PathProgramCache]: Analyzing trace with hash -2090831713, now seen corresponding path program 1 times [2021-11-23 17:16:17,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:17,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1151645343] [2021-11-23 17:16:17,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:17,344 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:17,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:17,345 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:17,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 17:16:18,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:18,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:16:18,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:18,436 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 17:16:18,436 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:16:18,436 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:18,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1151645343] [2021-11-23 17:16:18,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1151645343] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:16:18,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:16:18,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:16:18,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099213989] [2021-11-23 17:16:18,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:16:18,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:16:18,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:18,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:16:18,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:16:18,439 INFO L87 Difference]: Start difference. First operand 1814 states and 2500 transitions. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 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 17:16:20,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:20,541 INFO L93 Difference]: Finished difference Result 3692 states and 5430 transitions. [2021-11-23 17:16:20,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 17:16:20,551 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 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 17:16:20,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:20,569 INFO L225 Difference]: With dead ends: 3692 [2021-11-23 17:16:20,569 INFO L226 Difference]: Without dead ends: 2956 [2021-11-23 17:16:20,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:16:20,573 INFO L933 BasicCegarLoop]: 1005 mSDtfsCounter, 3801 mSDsluCounter, 1436 mSDsCounter, 0 mSdLazyCounter, 1394 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3801 SdHoareTripleChecker+Valid, 2441 SdHoareTripleChecker+Invalid, 1700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:20,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3801 Valid, 2441 Invalid, 1700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1394 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-23 17:16:20,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2956 states. [2021-11-23 17:16:20,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2956 to 1818. [2021-11-23 17:16:20,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 1.3736929003852505) internal successors, (2496), 1817 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:20,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 2496 transitions. [2021-11-23 17:16:20,712 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 2496 transitions. Word has length 82 [2021-11-23 17:16:20,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:20,712 INFO L470 AbstractCegarLoop]: Abstraction has 1818 states and 2496 transitions. [2021-11-23 17:16:20,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 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 17:16:20,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 2496 transitions. [2021-11-23 17:16:20,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-23 17:16:20,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:20,733 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 17:16:20,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:20,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:16:20,944 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:20,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:20,944 INFO L85 PathProgramCache]: Analyzing trace with hash -248554957, now seen corresponding path program 1 times [2021-11-23 17:16:20,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:20,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1859597455] [2021-11-23 17:16:20,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:20,946 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:20,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:20,947 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:20,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 17:16:21,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:21,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:16:21,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:22,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:22,043 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:16:22,043 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:22,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1859597455] [2021-11-23 17:16:22,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1859597455] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:16:22,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:16:22,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:16:22,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032420274] [2021-11-23 17:16:22,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:16:22,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:16:22,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:22,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:16:22,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:16:22,046 INFO L87 Difference]: Start difference. First operand 1818 states and 2496 transitions. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 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 17:16:24,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:24,123 INFO L93 Difference]: Finished difference Result 4937 states and 7311 transitions. [2021-11-23 17:16:24,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 17:16:24,124 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 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 17:16:24,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:24,145 INFO L225 Difference]: With dead ends: 4937 [2021-11-23 17:16:24,145 INFO L226 Difference]: Without dead ends: 4177 [2021-11-23 17:16:24,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:16:24,150 INFO L933 BasicCegarLoop]: 1014 mSDtfsCounter, 4483 mSDsluCounter, 1570 mSDsCounter, 0 mSdLazyCounter, 1540 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4483 SdHoareTripleChecker+Valid, 2584 SdHoareTripleChecker+Invalid, 1844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 1540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:24,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4483 Valid, 2584 Invalid, 1844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 1540 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-23 17:16:24,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4177 states. [2021-11-23 17:16:24,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4177 to 1836. [2021-11-23 17:16:24,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1836 states, 1835 states have (on average 1.3689373297002725) internal successors, (2512), 1835 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:24,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1836 states to 1836 states and 2512 transitions. [2021-11-23 17:16:24,360 INFO L78 Accepts]: Start accepts. Automaton has 1836 states and 2512 transitions. Word has length 82 [2021-11-23 17:16:24,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:24,362 INFO L470 AbstractCegarLoop]: Abstraction has 1836 states and 2512 transitions. [2021-11-23 17:16:24,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 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 17:16:24,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1836 states and 2512 transitions. [2021-11-23 17:16:24,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-23 17:16:24,367 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:24,367 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 17:16:24,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:24,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:16:24,589 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:24,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:24,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1549613280, now seen corresponding path program 1 times [2021-11-23 17:16:24,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:24,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [839155977] [2021-11-23 17:16:24,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:24,590 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:24,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:24,592 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:24,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 17:16:25,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:25,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:16:25,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:25,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:25,433 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:16:25,433 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:25,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [839155977] [2021-11-23 17:16:25,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [839155977] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:16:25,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:16:25,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:16:25,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025100921] [2021-11-23 17:16:25,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:16:25,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:16:25,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:25,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:16:25,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:16:25,438 INFO L87 Difference]: Start difference. First operand 1836 states and 2512 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 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 17:16:25,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:25,673 INFO L93 Difference]: Finished difference Result 3332 states and 4746 transitions. [2021-11-23 17:16:25,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:16:25,673 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 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 17:16:25,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:25,686 INFO L225 Difference]: With dead ends: 3332 [2021-11-23 17:16:25,686 INFO L226 Difference]: Without dead ends: 2554 [2021-11-23 17:16:25,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:16:25,689 INFO L933 BasicCegarLoop]: 1596 mSDtfsCounter, 824 mSDsluCounter, 1057 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 2653 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:25,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [824 Valid, 2653 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:16:25,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2554 states. [2021-11-23 17:16:25,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2554 to 2552. [2021-11-23 17:16:25,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2551 states have (on average 1.3923951391611133) internal successors, (3552), 2551 states have internal predecessors, (3552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:25,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 3552 transitions. [2021-11-23 17:16:25,854 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 3552 transitions. Word has length 82 [2021-11-23 17:16:25,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:25,854 INFO L470 AbstractCegarLoop]: Abstraction has 2552 states and 3552 transitions. [2021-11-23 17:16:25,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 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 17:16:25,854 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 3552 transitions. [2021-11-23 17:16:25,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-23 17:16:25,858 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:25,858 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 17:16:25,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:26,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:16:26,059 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:26,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:26,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1485846688, now seen corresponding path program 1 times [2021-11-23 17:16:26,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:26,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1015342914] [2021-11-23 17:16:26,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:26,060 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:26,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:26,061 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:26,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 17:16:26,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:26,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:16:26,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:27,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:27,003 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:16:27,003 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:27,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1015342914] [2021-11-23 17:16:27,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1015342914] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:16:27,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:16:27,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:16:27,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133956649] [2021-11-23 17:16:27,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:16:27,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:16:27,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:27,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:16:27,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:16:27,006 INFO L87 Difference]: Start difference. First operand 2552 states and 3552 transitions. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 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 17:16:29,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:29,073 INFO L93 Difference]: Finished difference Result 7604 states and 11164 transitions. [2021-11-23 17:16:29,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 17:16:29,073 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 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 17:16:29,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:29,085 INFO L225 Difference]: With dead ends: 7604 [2021-11-23 17:16:29,085 INFO L226 Difference]: Without dead ends: 6490 [2021-11-23 17:16:29,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:16:29,088 INFO L933 BasicCegarLoop]: 1011 mSDtfsCounter, 3620 mSDsluCounter, 1558 mSDsCounter, 0 mSdLazyCounter, 1522 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3620 SdHoareTripleChecker+Valid, 2569 SdHoareTripleChecker+Invalid, 1821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 1522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:29,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3620 Valid, 2569 Invalid, 1821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 1522 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-23 17:16:29,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6490 states. [2021-11-23 17:16:29,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6490 to 2668. [2021-11-23 17:16:29,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2668 states, 2667 states have (on average 1.3828271466066742) internal successors, (3688), 2667 states have internal predecessors, (3688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:29,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2668 states to 2668 states and 3688 transitions. [2021-11-23 17:16:29,280 INFO L78 Accepts]: Start accepts. Automaton has 2668 states and 3688 transitions. Word has length 82 [2021-11-23 17:16:29,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:29,281 INFO L470 AbstractCegarLoop]: Abstraction has 2668 states and 3688 transitions. [2021-11-23 17:16:29,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 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 17:16:29,282 INFO L276 IsEmpty]: Start isEmpty. Operand 2668 states and 3688 transitions. [2021-11-23 17:16:29,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-23 17:16:29,287 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:29,288 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 17:16:29,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:29,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:16:29,505 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:29,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:29,505 INFO L85 PathProgramCache]: Analyzing trace with hash -610531481, now seen corresponding path program 1 times [2021-11-23 17:16:29,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:29,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [914812506] [2021-11-23 17:16:29,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:29,507 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:29,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:29,508 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:29,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 17:16:30,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:30,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:16:30,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:30,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:30,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:16:30,685 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:30,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [914812506] [2021-11-23 17:16:30,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [914812506] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:16:30,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:16:30,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:16:30,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064519545] [2021-11-23 17:16:30,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:16:30,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:16:30,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:30,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:16:30,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:16:30,688 INFO L87 Difference]: Start difference. First operand 2668 states and 3688 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 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 17:16:31,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:31,988 INFO L93 Difference]: Finished difference Result 3743 states and 5293 transitions. [2021-11-23 17:16:31,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:16:31,989 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 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 17:16:31,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:31,992 INFO L225 Difference]: With dead ends: 3743 [2021-11-23 17:16:31,992 INFO L226 Difference]: Without dead ends: 2673 [2021-11-23 17:16:31,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:16:31,995 INFO L933 BasicCegarLoop]: 1561 mSDtfsCounter, 39 mSDsluCounter, 1890 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 3451 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:31,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 3451 Invalid, 1212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1191 Invalid, 0 Unknown, 20 Unchecked, 1.1s Time] [2021-11-23 17:16:32,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2673 states. [2021-11-23 17:16:32,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2673 to 2672. [2021-11-23 17:16:32,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2672 states, 2671 states have (on average 1.3826282291276675) internal successors, (3693), 2671 states have internal predecessors, (3693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:32,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2672 states to 2672 states and 3693 transitions. [2021-11-23 17:16:32,160 INFO L78 Accepts]: Start accepts. Automaton has 2672 states and 3693 transitions. Word has length 82 [2021-11-23 17:16:32,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:32,160 INFO L470 AbstractCegarLoop]: Abstraction has 2672 states and 3693 transitions. [2021-11-23 17:16:32,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 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 17:16:32,161 INFO L276 IsEmpty]: Start isEmpty. Operand 2672 states and 3693 transitions. [2021-11-23 17:16:32,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-23 17:16:32,166 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:32,166 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:16:32,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:32,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:16:32,375 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:32,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:32,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1811751208, now seen corresponding path program 1 times [2021-11-23 17:16:32,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:32,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [459731873] [2021-11-23 17:16:32,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:32,376 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:32,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:32,377 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:32,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 17:16:32,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:33,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:16:33,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:33,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:33,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:16:33,172 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:33,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [459731873] [2021-11-23 17:16:33,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [459731873] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:16:33,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:16:33,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:16:33,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996293029] [2021-11-23 17:16:33,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:16:33,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:16:33,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:33,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:16:33,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:16:33,174 INFO L87 Difference]: Start difference. First operand 2672 states and 3693 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 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 17:16:33,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:33,460 INFO L93 Difference]: Finished difference Result 4876 states and 6979 transitions. [2021-11-23 17:16:33,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:16:33,461 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 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 17:16:33,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:33,470 INFO L225 Difference]: With dead ends: 4876 [2021-11-23 17:16:33,471 INFO L226 Difference]: Without dead ends: 3759 [2021-11-23 17:16:33,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:16:33,475 INFO L933 BasicCegarLoop]: 1699 mSDtfsCounter, 764 mSDsluCounter, 1106 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 764 SdHoareTripleChecker+Valid, 2805 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:33,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [764 Valid, 2805 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:16:33,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3759 states. [2021-11-23 17:16:33,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3759 to 3753. [2021-11-23 17:16:33,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3753 states, 3752 states have (on average 1.4067164179104477) internal successors, (5278), 3752 states have internal predecessors, (5278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:33,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3753 states to 3753 states and 5278 transitions. [2021-11-23 17:16:33,880 INFO L78 Accepts]: Start accepts. Automaton has 3753 states and 5278 transitions. Word has length 82 [2021-11-23 17:16:33,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:33,880 INFO L470 AbstractCegarLoop]: Abstraction has 3753 states and 5278 transitions. [2021-11-23 17:16:33,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 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 17:16:33,881 INFO L276 IsEmpty]: Start isEmpty. Operand 3753 states and 5278 transitions. [2021-11-23 17:16:33,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-23 17:16:33,887 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:33,887 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 17:16:33,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-23 17:16:34,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:16:34,105 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:34,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:34,105 INFO L85 PathProgramCache]: Analyzing trace with hash 554793791, now seen corresponding path program 1 times [2021-11-23 17:16:34,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:34,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [603780866] [2021-11-23 17:16:34,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:34,106 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:34,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:34,107 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:34,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 17:16:34,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:34,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:16:34,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:35,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:35,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:16:35,097 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:35,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [603780866] [2021-11-23 17:16:35,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [603780866] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:16:35,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:16:35,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:16:35,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876741882] [2021-11-23 17:16:35,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:16:35,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:16:35,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:35,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:16:35,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:16:35,100 INFO L87 Difference]: Start difference. First operand 3753 states and 5278 transitions. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 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 17:16:37,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:37,760 INFO L93 Difference]: Finished difference Result 12039 states and 17595 transitions. [2021-11-23 17:16:37,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 17:16:37,761 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 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 17:16:37,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:37,793 INFO L225 Difference]: With dead ends: 12039 [2021-11-23 17:16:37,793 INFO L226 Difference]: Without dead ends: 10373 [2021-11-23 17:16:37,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:16:37,799 INFO L933 BasicCegarLoop]: 1016 mSDtfsCounter, 3861 mSDsluCounter, 1488 mSDsCounter, 0 mSdLazyCounter, 1498 mSolverCounterSat, 344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3861 SdHoareTripleChecker+Valid, 2504 SdHoareTripleChecker+Invalid, 1842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 1498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:37,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3861 Valid, 2504 Invalid, 1842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [344 Valid, 1498 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-23 17:16:37,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10373 states. [2021-11-23 17:16:38,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10373 to 4139. [2021-11-23 17:16:38,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4139 states, 4138 states have (on average 1.3910101498308363) internal successors, (5756), 4138 states have internal predecessors, (5756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:38,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4139 states to 4139 states and 5756 transitions. [2021-11-23 17:16:38,393 INFO L78 Accepts]: Start accepts. Automaton has 4139 states and 5756 transitions. Word has length 82 [2021-11-23 17:16:38,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:38,394 INFO L470 AbstractCegarLoop]: Abstraction has 4139 states and 5756 transitions. [2021-11-23 17:16:38,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 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 17:16:38,394 INFO L276 IsEmpty]: Start isEmpty. Operand 4139 states and 5756 transitions. [2021-11-23 17:16:38,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-23 17:16:38,402 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:38,402 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 17:16:38,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:38,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:16:38,619 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:38,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:38,620 INFO L85 PathProgramCache]: Analyzing trace with hash 763673234, now seen corresponding path program 1 times [2021-11-23 17:16:38,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:38,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1594220652] [2021-11-23 17:16:38,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:38,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:38,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:38,622 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:38,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 17:16:39,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:39,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:16:39,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:39,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:39,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:16:39,415 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:39,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1594220652] [2021-11-23 17:16:39,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1594220652] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:16:39,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:16:39,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:16:39,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565864282] [2021-11-23 17:16:39,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:16:39,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:16:39,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:39,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:16:39,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:16:39,417 INFO L87 Difference]: Start difference. First operand 4139 states and 5756 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 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 17:16:40,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:40,000 INFO L93 Difference]: Finished difference Result 9354 states and 13242 transitions. [2021-11-23 17:16:40,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:16:40,001 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 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 17:16:40,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:40,013 INFO L225 Difference]: With dead ends: 9354 [2021-11-23 17:16:40,014 INFO L226 Difference]: Without dead ends: 6759 [2021-11-23 17:16:40,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:16:40,021 INFO L933 BasicCegarLoop]: 2128 mSDtfsCounter, 1204 mSDsluCounter, 1077 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1204 SdHoareTripleChecker+Valid, 3205 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:40,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1204 Valid, 3205 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:16:40,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6759 states. [2021-11-23 17:16:40,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6759 to 6757. [2021-11-23 17:16:40,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6757 states, 6756 states have (on average 1.387951450562463) internal successors, (9377), 6756 states have internal predecessors, (9377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:40,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6757 states to 6757 states and 9377 transitions. [2021-11-23 17:16:40,755 INFO L78 Accepts]: Start accepts. Automaton has 6757 states and 9377 transitions. Word has length 82 [2021-11-23 17:16:40,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:40,755 INFO L470 AbstractCegarLoop]: Abstraction has 6757 states and 9377 transitions. [2021-11-23 17:16:40,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 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 17:16:40,756 INFO L276 IsEmpty]: Start isEmpty. Operand 6757 states and 9377 transitions. [2021-11-23 17:16:40,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-23 17:16:40,767 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:40,767 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 17:16:40,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:40,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:16:40,983 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:40,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:40,983 INFO L85 PathProgramCache]: Analyzing trace with hash 590935659, now seen corresponding path program 1 times [2021-11-23 17:16:40,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:40,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [460907004] [2021-11-23 17:16:40,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:40,984 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:40,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:40,985 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:40,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-23 17:16:41,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:41,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:16:41,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:41,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:41,770 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:16:41,770 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:41,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [460907004] [2021-11-23 17:16:41,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [460907004] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:16:41,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:16:41,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:16:41,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103707636] [2021-11-23 17:16:41,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:16:41,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:16:41,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:41,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:16:41,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:16:41,773 INFO L87 Difference]: Start difference. First operand 6757 states and 9377 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 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 17:16:42,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:42,751 INFO L93 Difference]: Finished difference Result 14418 states and 20457 transitions. [2021-11-23 17:16:42,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:16:42,751 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 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 17:16:42,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:42,764 INFO L225 Difference]: With dead ends: 14418 [2021-11-23 17:16:42,764 INFO L226 Difference]: Without dead ends: 10244 [2021-11-23 17:16:42,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:16:42,773 INFO L933 BasicCegarLoop]: 1695 mSDtfsCounter, 763 mSDsluCounter, 1106 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 2801 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:42,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [763 Valid, 2801 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:16:42,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10244 states. [2021-11-23 17:16:43,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10244 to 10226. [2021-11-23 17:16:43,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10226 states, 10225 states have (on average 1.4007823960880195) internal successors, (14323), 10225 states have internal predecessors, (14323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:43,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10226 states to 10226 states and 14323 transitions. [2021-11-23 17:16:43,976 INFO L78 Accepts]: Start accepts. Automaton has 10226 states and 14323 transitions. Word has length 82 [2021-11-23 17:16:43,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:43,977 INFO L470 AbstractCegarLoop]: Abstraction has 10226 states and 14323 transitions. [2021-11-23 17:16:43,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 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 17:16:43,977 INFO L276 IsEmpty]: Start isEmpty. Operand 10226 states and 14323 transitions. [2021-11-23 17:16:43,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-23 17:16:43,987 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:43,988 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 17:16:44,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-23 17:16:44,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:16:44,205 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:44,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:44,206 INFO L85 PathProgramCache]: Analyzing trace with hash -451242065, now seen corresponding path program 1 times [2021-11-23 17:16:44,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:44,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [867051736] [2021-11-23 17:16:44,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:44,208 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:44,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:44,209 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:44,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-23 17:16:44,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:44,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:16:44,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:45,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:45,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:16:45,283 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:45,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [867051736] [2021-11-23 17:16:45,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [867051736] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:16:45,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:16:45,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:16:45,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368688070] [2021-11-23 17:16:45,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:16:45,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:16:45,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:45,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:16:45,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:16:45,285 INFO L87 Difference]: Start difference. First operand 10226 states and 14323 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 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 17:16:47,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:47,024 INFO L93 Difference]: Finished difference Result 16834 states and 23948 transitions. [2021-11-23 17:16:47,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:16:47,025 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 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 17:16:47,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:47,036 INFO L225 Difference]: With dead ends: 16834 [2021-11-23 17:16:47,036 INFO L226 Difference]: Without dead ends: 9886 [2021-11-23 17:16:47,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:16:47,044 INFO L933 BasicCegarLoop]: 1452 mSDtfsCounter, 48 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 2364 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:47,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 2364 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 537 Invalid, 0 Unknown, 18 Unchecked, 0.7s Time] [2021-11-23 17:16:47,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9886 states. [2021-11-23 17:16:48,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9886 to 9886. [2021-11-23 17:16:48,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9886 states, 9885 states have (on average 1.4019221041982801) internal successors, (13858), 9885 states have internal predecessors, (13858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:48,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9886 states to 9886 states and 13858 transitions. [2021-11-23 17:16:48,119 INFO L78 Accepts]: Start accepts. Automaton has 9886 states and 13858 transitions. Word has length 82 [2021-11-23 17:16:48,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:48,119 INFO L470 AbstractCegarLoop]: Abstraction has 9886 states and 13858 transitions. [2021-11-23 17:16:48,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 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 17:16:48,120 INFO L276 IsEmpty]: Start isEmpty. Operand 9886 states and 13858 transitions. [2021-11-23 17:16:48,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-23 17:16:48,132 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:48,132 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] [2021-11-23 17:16:48,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:48,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:16:48,339 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:48,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:48,339 INFO L85 PathProgramCache]: Analyzing trace with hash 992721658, now seen corresponding path program 1 times [2021-11-23 17:16:48,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:48,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [701178718] [2021-11-23 17:16:48,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:48,340 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:48,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:48,341 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:48,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-23 17:16:48,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:48,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:16:48,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:49,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:49,415 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:16:49,415 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:49,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [701178718] [2021-11-23 17:16:49,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [701178718] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:16:49,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:16:49,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:16:49,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464228113] [2021-11-23 17:16:49,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:16:49,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:16:49,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:49,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:16:49,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:16:49,416 INFO L87 Difference]: Start difference. First operand 9886 states and 13858 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:51,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:51,462 INFO L93 Difference]: Finished difference Result 11080 states and 15579 transitions. [2021-11-23 17:16:51,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:16:51,463 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2021-11-23 17:16:51,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:51,474 INFO L225 Difference]: With dead ends: 11080 [2021-11-23 17:16:51,474 INFO L226 Difference]: Without dead ends: 9883 [2021-11-23 17:16:51,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:16:51,479 INFO L933 BasicCegarLoop]: 1445 mSDtfsCounter, 41 mSDsluCounter, 1709 mSDsCounter, 0 mSdLazyCounter, 1147 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 3154 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:51,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 3154 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1147 Invalid, 0 Unknown, 25 Unchecked, 1.2s Time] [2021-11-23 17:16:51,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9883 states. [2021-11-23 17:16:52,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9883 to 9883. [2021-11-23 17:16:52,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9883 states, 9882 states have (on average 1.4019429265330905) internal successors, (13854), 9882 states have internal predecessors, (13854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:52,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9883 states to 9883 states and 13854 transitions. [2021-11-23 17:16:52,473 INFO L78 Accepts]: Start accepts. Automaton has 9883 states and 13854 transitions. Word has length 83 [2021-11-23 17:16:52,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:52,473 INFO L470 AbstractCegarLoop]: Abstraction has 9883 states and 13854 transitions. [2021-11-23 17:16:52,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:52,474 INFO L276 IsEmpty]: Start isEmpty. Operand 9883 states and 13854 transitions. [2021-11-23 17:16:52,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-23 17:16:52,486 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:52,486 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] [2021-11-23 17:16:52,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:52,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:16:52,687 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:52,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:52,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1427495216, now seen corresponding path program 1 times [2021-11-23 17:16:52,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:52,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1223137238] [2021-11-23 17:16:52,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:52,689 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:52,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:52,689 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:52,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-23 17:16:53,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:53,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 674 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:16:53,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:53,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:53,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:16:53,479 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:53,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1223137238] [2021-11-23 17:16:53,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1223137238] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:16:53,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:16:53,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:16:53,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581684899] [2021-11-23 17:16:53,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:16:53,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:16:53,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:53,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:16:53,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:16:53,482 INFO L87 Difference]: Start difference. First operand 9883 states and 13854 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:55,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:55,437 INFO L93 Difference]: Finished difference Result 23324 states and 33001 transitions. [2021-11-23 17:16:55,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:16:55,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2021-11-23 17:16:55,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:55,458 INFO L225 Difference]: With dead ends: 23324 [2021-11-23 17:16:55,458 INFO L226 Difference]: Without dead ends: 17143 [2021-11-23 17:16:55,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:16:55,466 INFO L933 BasicCegarLoop]: 1637 mSDtfsCounter, 742 mSDsluCounter, 987 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 2624 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:55,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [742 Valid, 2624 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 17:16:55,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17143 states. [2021-11-23 17:16:57,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17143 to 17141. [2021-11-23 17:16:57,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17141 states, 17140 states have (on average 1.39049008168028) internal successors, (23833), 17140 states have internal predecessors, (23833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:57,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17141 states to 17141 states and 23833 transitions. [2021-11-23 17:16:57,201 INFO L78 Accepts]: Start accepts. Automaton has 17141 states and 23833 transitions. Word has length 83 [2021-11-23 17:16:57,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:57,202 INFO L470 AbstractCegarLoop]: Abstraction has 17141 states and 23833 transitions. [2021-11-23 17:16:57,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:57,202 INFO L276 IsEmpty]: Start isEmpty. Operand 17141 states and 23833 transitions. [2021-11-23 17:16:57,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-23 17:16:57,217 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:57,217 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] [2021-11-23 17:16:57,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:57,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:16:57,418 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:57,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:57,419 INFO L85 PathProgramCache]: Analyzing trace with hash -405127857, now seen corresponding path program 1 times [2021-11-23 17:16:57,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:57,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1349444072] [2021-11-23 17:16:57,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:57,419 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:57,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:57,420 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:57,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-23 17:16:58,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:58,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:16:58,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:58,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:58,267 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:16:58,267 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:58,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1349444072] [2021-11-23 17:16:58,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1349444072] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:16:58,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:16:58,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:16:58,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353494396] [2021-11-23 17:16:58,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:16:58,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:16:58,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:58,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:16:58,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:16:58,270 INFO L87 Difference]: Start difference. First operand 17141 states and 23833 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:01,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:17:01,614 INFO L93 Difference]: Finished difference Result 35593 states and 49864 transitions. [2021-11-23 17:17:01,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:17:01,614 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2021-11-23 17:17:01,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:17:01,658 INFO L225 Difference]: With dead ends: 35593 [2021-11-23 17:17:01,658 INFO L226 Difference]: Without dead ends: 27206 [2021-11-23 17:17:01,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:17:01,671 INFO L933 BasicCegarLoop]: 1356 mSDtfsCounter, 1331 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1331 SdHoareTripleChecker+Valid, 1666 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:17:01,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1331 Valid, 1666 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 17:17:01,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27206 states. [2021-11-23 17:17:04,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27206 to 27140. [2021-11-23 17:17:04,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27140 states, 27139 states have (on average 1.411916430229559) internal successors, (38318), 27139 states have internal predecessors, (38318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:04,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27140 states to 27140 states and 38318 transitions. [2021-11-23 17:17:04,896 INFO L78 Accepts]: Start accepts. Automaton has 27140 states and 38318 transitions. Word has length 83 [2021-11-23 17:17:04,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:17:04,896 INFO L470 AbstractCegarLoop]: Abstraction has 27140 states and 38318 transitions. [2021-11-23 17:17:04,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:04,897 INFO L276 IsEmpty]: Start isEmpty. Operand 27140 states and 38318 transitions. [2021-11-23 17:17:04,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-23 17:17:04,908 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:17:04,908 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, 1, 1, 1, 1] [2021-11-23 17:17:04,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:05,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:17:05,109 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:17:05,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:17:05,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1692591963, now seen corresponding path program 1 times [2021-11-23 17:17:05,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:17:05,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1967981470] [2021-11-23 17:17:05,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:17:05,110 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:17:05,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:17:05,111 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:17:05,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-23 17:17:05,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:17:05,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:17:05,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:06,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:17:06,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:17:06,233 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:17:06,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1967981470] [2021-11-23 17:17:06,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1967981470] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:17:06,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:17:06,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:17:06,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544963960] [2021-11-23 17:17:06,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:17:06,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:17:06,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:17:06,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:17:06,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:17:06,236 INFO L87 Difference]: Start difference. First operand 27140 states and 38318 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:10,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:17:10,269 INFO L93 Difference]: Finished difference Result 31434 states and 44459 transitions. [2021-11-23 17:17:10,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:17:10,269 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2021-11-23 17:17:10,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:17:10,314 INFO L225 Difference]: With dead ends: 31434 [2021-11-23 17:17:10,314 INFO L226 Difference]: Without dead ends: 27137 [2021-11-23 17:17:10,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:17:10,327 INFO L933 BasicCegarLoop]: 1367 mSDtfsCounter, 37 mSDsluCounter, 1642 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 3009 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 581 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:17:10,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 3009 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 496 Invalid, 0 Unknown, 581 Unchecked, 0.7s Time] [2021-11-23 17:17:10,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27137 states. [2021-11-23 17:17:13,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27137 to 27137. [2021-11-23 17:17:13,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27137 states, 27136 states have (on average 1.4119251179245282) internal successors, (38314), 27136 states have internal predecessors, (38314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:13,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27137 states to 27137 states and 38314 transitions. [2021-11-23 17:17:13,964 INFO L78 Accepts]: Start accepts. Automaton has 27137 states and 38314 transitions. Word has length 83 [2021-11-23 17:17:13,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:17:13,965 INFO L470 AbstractCegarLoop]: Abstraction has 27137 states and 38314 transitions. [2021-11-23 17:17:13,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:13,965 INFO L276 IsEmpty]: Start isEmpty. Operand 27137 states and 38314 transitions. [2021-11-23 17:17:13,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-23 17:17:13,977 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:17:13,977 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] [2021-11-23 17:17:13,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:14,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:17:14,179 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:17:14,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:17:14,179 INFO L85 PathProgramCache]: Analyzing trace with hash -403786206, now seen corresponding path program 1 times [2021-11-23 17:17:14,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:17:14,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [780474078] [2021-11-23 17:17:14,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:17:14,180 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:17:14,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:17:14,181 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:17:14,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-23 17:17:14,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:17:14,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:17:14,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:15,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:17:15,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:17:15,375 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:17:15,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [780474078] [2021-11-23 17:17:15,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [780474078] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:17:15,376 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:17:15,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:17:15,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910024698] [2021-11-23 17:17:15,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:17:15,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:17:15,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:17:15,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:17:15,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:17:15,378 INFO L87 Difference]: Start difference. First operand 27137 states and 38314 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:19,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:17:19,050 INFO L93 Difference]: Finished difference Result 36235 states and 51453 transitions. [2021-11-23 17:17:19,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:17:19,051 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2021-11-23 17:17:19,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:17:19,088 INFO L225 Difference]: With dead ends: 36235 [2021-11-23 17:17:19,088 INFO L226 Difference]: Without dead ends: 27117 [2021-11-23 17:17:19,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:17:19,102 INFO L933 BasicCegarLoop]: 1347 mSDtfsCounter, 46 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 2206 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:17:19,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 2206 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 492 Invalid, 0 Unknown, 20 Unchecked, 0.6s Time] [2021-11-23 17:17:19,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27117 states. [2021-11-23 17:17:22,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27117 to 27117. [2021-11-23 17:17:22,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27117 states, 27116 states have (on average 1.412044549343561) internal successors, (38289), 27116 states have internal predecessors, (38289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:22,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27117 states to 27117 states and 38289 transitions. [2021-11-23 17:17:22,366 INFO L78 Accepts]: Start accepts. Automaton has 27117 states and 38289 transitions. Word has length 83 [2021-11-23 17:17:22,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:17:22,366 INFO L470 AbstractCegarLoop]: Abstraction has 27117 states and 38289 transitions. [2021-11-23 17:17:22,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:22,366 INFO L276 IsEmpty]: Start isEmpty. Operand 27117 states and 38289 transitions. [2021-11-23 17:17:22,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-23 17:17:22,377 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:17:22,378 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] [2021-11-23 17:17:22,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:22,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:17:22,578 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:17:22,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:17:22,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1627227074, now seen corresponding path program 1 times [2021-11-23 17:17:22,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:17:22,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1899914330] [2021-11-23 17:17:22,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:17:22,580 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:17:22,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:17:22,580 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:17:22,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-23 17:17:23,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:17:23,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:17:23,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:23,775 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 17:17:23,775 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:17:23,775 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:17:23,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1899914330] [2021-11-23 17:17:23,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1899914330] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:17:23,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:17:23,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:17:23,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882733628] [2021-11-23 17:17:23,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:17:23,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:17:23,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:17:23,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:17:23,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:17:23,778 INFO L87 Difference]: Start difference. First operand 27117 states and 38289 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:28,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:17:28,038 INFO L93 Difference]: Finished difference Result 36651 states and 52016 transitions. [2021-11-23 17:17:28,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:17:28,039 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2021-11-23 17:17:28,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:17:28,076 INFO L225 Difference]: With dead ends: 36651 [2021-11-23 17:17:28,076 INFO L226 Difference]: Without dead ends: 27097 [2021-11-23 17:17:28,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:17:28,086 INFO L933 BasicCegarLoop]: 1322 mSDtfsCounter, 29 mSDsluCounter, 2366 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 3688 SdHoareTripleChecker+Invalid, 1531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 528 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:17:28,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 3688 Invalid, 1531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1002 Invalid, 0 Unknown, 528 Unchecked, 1.0s Time] [2021-11-23 17:17:28,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27097 states. [2021-11-23 17:17:31,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27097 to 27097. [2021-11-23 17:17:31,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27097 states, 27096 states have (on average 1.4121641570711545) internal successors, (38264), 27096 states have internal predecessors, (38264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:31,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27097 states to 27097 states and 38264 transitions. [2021-11-23 17:17:31,776 INFO L78 Accepts]: Start accepts. Automaton has 27097 states and 38264 transitions. Word has length 83 [2021-11-23 17:17:31,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:17:31,776 INFO L470 AbstractCegarLoop]: Abstraction has 27097 states and 38264 transitions. [2021-11-23 17:17:31,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:31,777 INFO L276 IsEmpty]: Start isEmpty. Operand 27097 states and 38264 transitions. [2021-11-23 17:17:31,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-23 17:17:31,788 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:17:31,788 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:17:31,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:32,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:17:32,006 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:17:32,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:17:32,006 INFO L85 PathProgramCache]: Analyzing trace with hash -155029479, now seen corresponding path program 1 times [2021-11-23 17:17:32,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:17:32,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [114299311] [2021-11-23 17:17:32,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:17:32,008 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:17:32,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:17:32,009 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:17:32,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-23 17:17:32,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:17:32,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:17:32,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:33,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:17:33,703 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:17:33,704 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:17:33,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [114299311] [2021-11-23 17:17:33,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [114299311] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:17:33,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:17:33,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:17:33,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236240616] [2021-11-23 17:17:33,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:17:33,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:17:33,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:17:33,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:17:33,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:17:33,706 INFO L87 Difference]: Start difference. First operand 27097 states and 38264 transitions. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:37,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:17:37,118 INFO L93 Difference]: Finished difference Result 29195 states and 41225 transitions. [2021-11-23 17:17:37,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:17:37,118 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2021-11-23 17:17:37,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:17:37,154 INFO L225 Difference]: With dead ends: 29195 [2021-11-23 17:17:37,154 INFO L226 Difference]: Without dead ends: 27109 [2021-11-23 17:17:37,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:17:37,160 INFO L933 BasicCegarLoop]: 1316 mSDtfsCounter, 62 mSDsluCounter, 3349 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 4665 SdHoareTripleChecker+Invalid, 1481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1478 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:17:37,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 4665 Invalid, 1481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 1478 Unchecked, 0.1s Time] [2021-11-23 17:17:37,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27109 states. [2021-11-23 17:17:40,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27109 to 27106. [2021-11-23 17:17:40,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27106 states, 27105 states have (on average 1.412174875484228) internal successors, (38277), 27105 states have internal predecessors, (38277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:40,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27106 states to 27106 states and 38277 transitions. [2021-11-23 17:17:40,563 INFO L78 Accepts]: Start accepts. Automaton has 27106 states and 38277 transitions. Word has length 83 [2021-11-23 17:17:40,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:17:40,564 INFO L470 AbstractCegarLoop]: Abstraction has 27106 states and 38277 transitions. [2021-11-23 17:17:40,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:40,564 INFO L276 IsEmpty]: Start isEmpty. Operand 27106 states and 38277 transitions. [2021-11-23 17:17:40,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-23 17:17:40,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:17:40,578 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:17:40,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:40,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:17:40,806 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:17:40,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:17:40,807 INFO L85 PathProgramCache]: Analyzing trace with hash 959993409, now seen corresponding path program 1 times [2021-11-23 17:17:40,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:17:40,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2129130469] [2021-11-23 17:17:40,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:17:40,808 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:17:40,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:17:40,809 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:17:40,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db89313-fa37-4bea-9568-aed465aa569c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-23 17:17:41,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:17:41,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:17:41,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:41,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:17:41,824 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:17:41,824 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:17:41,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2129130469] [2021-11-23 17:17:41,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2129130469] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:17:41,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:17:41,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:17:41,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366683094] [2021-11-23 17:17:41,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:17:41,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:17:41,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:17:41,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:17:41,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:17:41,826 INFO L87 Difference]: Start difference. First operand 27106 states and 38277 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:45,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:17:45,341 INFO L93 Difference]: Finished difference Result 31762 states and 44866 transitions. [2021-11-23 17:17:45,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:17:45,342 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2021-11-23 17:17:45,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:17:45,380 INFO L225 Difference]: With dead ends: 31762 [2021-11-23 17:17:45,380 INFO L226 Difference]: Without dead ends: 27086 [2021-11-23 17:17:45,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:17:45,390 INFO L933 BasicCegarLoop]: 1299 mSDtfsCounter, 45 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 2126 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:17:45,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 2126 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 476 Invalid, 0 Unknown, 18 Unchecked, 0.6s Time] [2021-11-23 17:17:45,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27086 states.