./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-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_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/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_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/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_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/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 e1221f43edcd55fb28cc2c33b3cd78828237d81c097e561fccaa486cdd56e141 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:30:53,506 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:30:53,509 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:30:53,567 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:30:53,568 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:30:53,573 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:30:53,576 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:30:53,580 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:30:53,584 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:30:53,591 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:30:53,593 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:30:53,595 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:30:53,596 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:30:53,600 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:30:53,604 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:30:53,609 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:30:53,611 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:30:53,612 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:30:53,616 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:30:53,627 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:30:53,629 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:30:53,631 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:30:53,636 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:30:53,637 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:30:53,649 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:30:53,650 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:30:53,650 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:30:53,653 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:30:53,654 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:30:53,656 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:30:53,658 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:30:53,659 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:30:53,662 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:30:53,663 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:30:53,669 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:30:53,670 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:30:53,671 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:30:53,671 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:30:53,671 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:30:53,673 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:30:53,673 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:30:53,675 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:30:53,736 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:30:53,739 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:30:53,740 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:30:53,740 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:30:53,749 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:30:53,750 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:30:53,750 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:30:53,750 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:30:53,751 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:30:53,751 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:30:53,753 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:30:53,753 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:30:53,753 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:30:53,754 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:30:53,754 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:30:53,755 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:30:53,755 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:30:53,755 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:30:53,756 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:30:53,757 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:30:53,757 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:30:53,757 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:30:53,758 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:30:53,758 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:30:53,758 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:30:53,759 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:30:53,761 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:30:53,761 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:30:53,762 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:30:53,762 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:30:53,762 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:30:53,763 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:30:53,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:30:53,773 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:30:53,773 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:30:53,773 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:30:53,774 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:30:53,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:30:53,775 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:30:53,775 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:30:53,775 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:30:53,776 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_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1221f43edcd55fb28cc2c33b3cd78828237d81c097e561fccaa486cdd56e141 [2021-11-23 17:30:54,126 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:30:54,163 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:30:54,166 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:30:54,169 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:30:54,170 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:30:54,171 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-23 17:30:54,287 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/data/c8250a5f3/9b3b04583b1e4730b3c0f5ac4390159e/FLAGbe8310870 [2021-11-23 17:30:54,941 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:30:54,942 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-23 17:30:54,955 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/data/c8250a5f3/9b3b04583b1e4730b3c0f5ac4390159e/FLAGbe8310870 [2021-11-23 17:30:55,177 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/data/c8250a5f3/9b3b04583b1e4730b3c0f5ac4390159e [2021-11-23 17:30:55,181 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:30:55,183 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:30:55,188 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:30:55,188 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:30:55,196 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:30:55,198 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:30:55" (1/1) ... [2021-11-23 17:30:55,200 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@408e08b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:30:55, skipping insertion in model container [2021-11-23 17:30:55,200 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:30:55" (1/1) ... [2021-11-23 17:30:55,211 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:30:55,289 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:30:55,603 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_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[7107,7120] [2021-11-23 17:30:55,701 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:30:55,717 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:30:55,793 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_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[7107,7120] [2021-11-23 17:30:55,843 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:30:55,868 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:30:55,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:30:55 WrapperNode [2021-11-23 17:30:55,869 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:30:55,870 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:30:55,870 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:30:55,870 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:30:55,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:30:55" (1/1) ... [2021-11-23 17:30:55,894 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:30:55" (1/1) ... [2021-11-23 17:30:55,950 INFO L137 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 636 [2021-11-23 17:30:55,950 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:30:55,951 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:30:55,951 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:30:55,951 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:30:55,961 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:30:55" (1/1) ... [2021-11-23 17:30:55,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:30:55" (1/1) ... [2021-11-23 17:30:55,974 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:30:55" (1/1) ... [2021-11-23 17:30:55,976 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:30:55" (1/1) ... [2021-11-23 17:30:55,993 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:30:55" (1/1) ... [2021-11-23 17:30:56,002 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:30:55" (1/1) ... [2021-11-23 17:30:56,006 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:30:55" (1/1) ... [2021-11-23 17:30:56,021 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:30:56,022 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:30:56,022 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:30:56,022 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:30:56,032 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:30:55" (1/1) ... [2021-11-23 17:30:56,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:30:56,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:30:56,098 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:30:56,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:30:56,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:30:56,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:30:56,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:30:56,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:30:56,350 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:30:56,352 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:30:57,226 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:30:57,278 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 17:30:57,284 INFO L158 Benchmark]: Toolchain (without parser) took 2099.73ms. Allocated memory was 94.4MB in the beginning and 115.3MB in the end (delta: 21.0MB). Free memory was 70.1MB in the beginning and 82.8MB in the end (delta: -12.8MB). Peak memory consumption was 49.8MB. Max. memory is 16.1GB. [2021-11-23 17:30:57,289 INFO L158 Benchmark]: CDTParser took 0.42ms. Allocated memory is still 94.4MB. Free memory is still 66.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:30:57,290 INFO L158 Benchmark]: CACSL2BoogieTranslator took 681.71ms. Allocated memory is still 94.4MB. Free memory was 69.9MB in the beginning and 60.9MB in the end (delta: 8.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 17:30:57,293 INFO L158 Benchmark]: Boogie Procedure Inliner took 80.37ms. Allocated memory is still 94.4MB. Free memory was 60.9MB in the beginning and 57.8MB in the end (delta: 3.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:30:57,294 INFO L158 Benchmark]: Boogie Preprocessor took 69.99ms. Allocated memory is still 94.4MB. Free memory was 57.8MB in the beginning and 55.4MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:30:57,296 INFO L158 Benchmark]: RCFGBuilder took 1259.60ms. Allocated memory was 94.4MB in the beginning and 115.3MB in the end (delta: 21.0MB). Free memory was 55.4MB in the beginning and 82.8MB in the end (delta: -27.4MB). Peak memory consumption was 38.7MB. Max. memory is 16.1GB. [2021-11-23 17:30:57,300 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.42ms. Allocated memory is still 94.4MB. Free memory is still 66.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 681.71ms. Allocated memory is still 94.4MB. Free memory was 69.9MB in the beginning and 60.9MB in the end (delta: 8.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 80.37ms. Allocated memory is still 94.4MB. Free memory was 60.9MB in the beginning and 57.8MB in the end (delta: 3.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 69.99ms. Allocated memory is still 94.4MB. Free memory was 57.8MB in the beginning and 55.4MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1259.60ms. Allocated memory was 94.4MB in the beginning and 115.3MB in the end (delta: 21.0MB). Free memory was 55.4MB in the beginning and 82.8MB in the end (delta: -27.4MB). Peak memory consumption was 38.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:30:57,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/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_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/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_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/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_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/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 e1221f43edcd55fb28cc2c33b3cd78828237d81c097e561fccaa486cdd56e141 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:31:00,280 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:31:00,285 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:31:00,350 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:31:00,350 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:31:00,357 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:31:00,359 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:31:00,365 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:31:00,370 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:31:00,380 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:31:00,382 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:31:00,384 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:31:00,385 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:31:00,388 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:31:00,392 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:31:00,397 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:31:00,399 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:31:00,402 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:31:00,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:31:00,414 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:31:00,417 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:31:00,419 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:31:00,422 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:31:00,425 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:31:00,437 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:31:00,437 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:31:00,438 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:31:00,440 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:31:00,441 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:31:00,443 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:31:00,443 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:31:00,445 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:31:00,447 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:31:00,448 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:31:00,450 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:31:00,471 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:31:00,473 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:31:00,473 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:31:00,474 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:31:00,477 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:31:00,478 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:31:00,479 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:31:00,537 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:31:00,537 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:31:00,538 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:31:00,538 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:31:00,540 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:31:00,540 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:31:00,541 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:31:00,541 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:31:00,541 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:31:00,541 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:31:00,543 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:31:00,543 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:31:00,545 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:31:00,546 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:31:00,546 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:31:00,546 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:31:00,547 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:31:00,547 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:31:00,547 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:31:00,548 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:31:00,548 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:31:00,548 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:31:00,549 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:31:00,549 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:31:00,549 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:31:00,549 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:31:00,550 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:31:00,550 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:31:00,550 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:31:00,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:31:00,551 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:31:00,551 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:31:00,552 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:31:00,553 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:31:00,553 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:31:00,553 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:31:00,554 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:31:00,554 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:31:00,554 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_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1221f43edcd55fb28cc2c33b3cd78828237d81c097e561fccaa486cdd56e141 [2021-11-23 17:31:01,132 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:31:01,159 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:31:01,162 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:31:01,164 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:31:01,165 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:31:01,166 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-23 17:31:01,260 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/data/50a477359/21df86521d674b54be32215c0e12fe59/FLAG49da2c3c1 [2021-11-23 17:31:02,045 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:31:02,049 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-23 17:31:02,067 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/data/50a477359/21df86521d674b54be32215c0e12fe59/FLAG49da2c3c1 [2021-11-23 17:31:02,332 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/data/50a477359/21df86521d674b54be32215c0e12fe59 [2021-11-23 17:31:02,335 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:31:02,337 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:31:02,346 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:31:02,346 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:31:02,351 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:31:02,352 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:31:02" (1/1) ... [2021-11-23 17:31:02,353 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a26fdb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:02, skipping insertion in model container [2021-11-23 17:31:02,354 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:31:02" (1/1) ... [2021-11-23 17:31:02,363 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:31:02,415 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:31:02,712 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[7107,7120] [2021-11-23 17:31:02,796 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:31:02,811 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:31:02,876 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_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[7107,7120] [2021-11-23 17:31:02,941 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:31:02,963 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:31:02,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:02 WrapperNode [2021-11-23 17:31:02,964 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:31:02,965 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:31:02,966 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:31:02,966 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:31:02,975 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:02" (1/1) ... [2021-11-23 17:31:02,996 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:02" (1/1) ... [2021-11-23 17:31:03,040 INFO L137 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 624 [2021-11-23 17:31:03,040 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:31:03,041 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:31:03,042 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:31:03,042 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:31:03,052 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:02" (1/1) ... [2021-11-23 17:31:03,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:02" (1/1) ... [2021-11-23 17:31:03,062 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:02" (1/1) ... [2021-11-23 17:31:03,062 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:02" (1/1) ... [2021-11-23 17:31:03,081 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:02" (1/1) ... [2021-11-23 17:31:03,090 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:02" (1/1) ... [2021-11-23 17:31:03,095 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:02" (1/1) ... [2021-11-23 17:31:03,102 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:31:03,103 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:31:03,104 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:31:03,104 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:31:03,105 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:02" (1/1) ... [2021-11-23 17:31:03,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:31:03,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:31:03,170 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:31:03,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:31:03,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:31:03,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:31:03,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:31:03,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:31:03,383 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:31:03,385 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:31:04,319 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:31:04,330 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:31:04,331 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 17:31:04,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:31:04 BoogieIcfgContainer [2021-11-23 17:31:04,334 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:31:04,336 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:31:04,336 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:31:04,340 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:31:04,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:31:02" (1/3) ... [2021-11-23 17:31:04,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7295d237 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:31:04, skipping insertion in model container [2021-11-23 17:31:04,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:02" (2/3) ... [2021-11-23 17:31:04,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7295d237 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:31:04, skipping insertion in model container [2021-11-23 17:31:04,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:31:04" (3/3) ... [2021-11-23 17:31:04,344 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-23 17:31:04,351 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:31:04,352 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:31:04,435 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:31:04,446 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 17:31:04,446 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:31:04,488 INFO L276 IsEmpty]: Start isEmpty. Operand has 170 states, 168 states have (on average 1.7202380952380953) internal successors, (289), 169 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:04,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-23 17:31:04,499 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:04,500 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] [2021-11-23 17:31:04,500 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:04,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:04,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1270648051, now seen corresponding path program 1 times [2021-11-23 17:31:04,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:04,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [927798914] [2021-11-23 17:31:04,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:04,536 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:04,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:04,538 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:04,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:31:04,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:04,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:31:04,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:05,966 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 17:31:05,967 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:31:05,968 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:05,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [927798914] [2021-11-23 17:31:05,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [927798914] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:31:05,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:31:05,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 17:31:05,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722990023] [2021-11-23 17:31:05,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:31:05,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:31:05,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:06,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:31:06,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:31:06,014 INFO L87 Difference]: Start difference. First operand has 170 states, 168 states have (on average 1.7202380952380953) internal successors, (289), 169 states have internal predecessors, (289), 0 states have call successors, (0), 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 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:06,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:06,253 INFO L93 Difference]: Finished difference Result 376 states and 614 transitions. [2021-11-23 17:31:06,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:31:06,256 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2021-11-23 17:31:06,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:06,272 INFO L225 Difference]: With dead ends: 376 [2021-11-23 17:31:06,272 INFO L226 Difference]: Without dead ends: 249 [2021-11-23 17:31:06,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:31:06,281 INFO L933 BasicCegarLoop]: 370 mSDtfsCounter, 237 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:06,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 1070 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 40 Invalid, 0 Unknown, 65 Unchecked, 0.2s Time] [2021-11-23 17:31:06,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-11-23 17:31:06,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 184. [2021-11-23 17:31:06,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.4480874316939891) internal successors, (265), 183 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:06,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 265 transitions. [2021-11-23 17:31:06,346 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 265 transitions. Word has length 63 [2021-11-23 17:31:06,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:06,347 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 265 transitions. [2021-11-23 17:31:06,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:06,348 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 265 transitions. [2021-11-23 17:31:06,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 17:31:06,351 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:06,351 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] [2021-11-23 17:31:06,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:06,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:31:06,566 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:06,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:06,567 INFO L85 PathProgramCache]: Analyzing trace with hash -691456228, now seen corresponding path program 1 times [2021-11-23 17:31:06,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:06,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1231897456] [2021-11-23 17:31:06,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:06,568 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:06,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:06,572 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:06,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:31:06,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:06,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:31:06,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:07,223 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 17:31:07,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:31:07,224 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:07,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1231897456] [2021-11-23 17:31:07,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1231897456] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:31:07,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:31:07,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:31:07,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860207374] [2021-11-23 17:31:07,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:31:07,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:31:07,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:07,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:31:07,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:31:07,229 INFO L87 Difference]: Start difference. First operand 184 states and 265 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:07,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:07,472 INFO L93 Difference]: Finished difference Result 311 states and 462 transitions. [2021-11-23 17:31:07,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:31:07,473 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2021-11-23 17:31:07,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:07,475 INFO L225 Difference]: With dead ends: 311 [2021-11-23 17:31:07,475 INFO L226 Difference]: Without dead ends: 185 [2021-11-23 17:31:07,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 60 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 17:31:07,478 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 23 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:07,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 609 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 176 Invalid, 0 Unknown, 100 Unchecked, 0.2s Time] [2021-11-23 17:31:07,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-11-23 17:31:07,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2021-11-23 17:31:07,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.4456521739130435) internal successors, (266), 184 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:07,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 266 transitions. [2021-11-23 17:31:07,533 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 266 transitions. Word has length 64 [2021-11-23 17:31:07,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:07,534 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 266 transitions. [2021-11-23 17:31:07,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:07,535 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 266 transitions. [2021-11-23 17:31:07,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 17:31:07,542 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:07,542 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] [2021-11-23 17:31:07,564 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-23 17:31:07,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:31:07,760 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:07,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:07,761 INFO L85 PathProgramCache]: Analyzing trace with hash 321235706, now seen corresponding path program 1 times [2021-11-23 17:31:07,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:07,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277171260] [2021-11-23 17:31:07,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:07,762 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:07,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:07,764 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:07,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:31:07,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:07,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:31:07,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:08,386 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 17:31:08,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:31:08,387 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:08,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277171260] [2021-11-23 17:31:08,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1277171260] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:31:08,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:31:08,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:31:08,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102475781] [2021-11-23 17:31:08,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:31:08,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:31:08,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:08,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:31:08,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:31:08,391 INFO L87 Difference]: Start difference. First operand 185 states and 266 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:08,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:08,536 INFO L93 Difference]: Finished difference Result 301 states and 448 transitions. [2021-11-23 17:31:08,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:31:08,537 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2021-11-23 17:31:08,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:08,539 INFO L225 Difference]: With dead ends: 301 [2021-11-23 17:31:08,539 INFO L226 Difference]: Without dead ends: 195 [2021-11-23 17:31:08,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 60 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 17:31:08,542 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 28 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:08,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 516 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 100 Unchecked, 0.1s Time] [2021-11-23 17:31:08,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-11-23 17:31:08,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 193. [2021-11-23 17:31:08,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.4375) internal successors, (276), 192 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:08,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 276 transitions. [2021-11-23 17:31:08,559 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 276 transitions. Word has length 64 [2021-11-23 17:31:08,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:08,559 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 276 transitions. [2021-11-23 17:31:08,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:08,560 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 276 transitions. [2021-11-23 17:31:08,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 17:31:08,562 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:08,562 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:31:08,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:08,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:31:08,776 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:08,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:08,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1092020245, now seen corresponding path program 1 times [2021-11-23 17:31:08,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:08,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [221823555] [2021-11-23 17:31:08,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:08,777 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:08,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:08,778 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:08,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:31:08,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:08,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:31:08,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:09,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:09,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:31:09,310 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:09,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [221823555] [2021-11-23 17:31:09,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [221823555] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:31:09,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:31:09,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:31:09,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981285467] [2021-11-23 17:31:09,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:31:09,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:31:09,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:09,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:31:09,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:31:09,317 INFO L87 Difference]: Start difference. First operand 193 states and 276 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:09,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:09,552 INFO L93 Difference]: Finished difference Result 310 states and 459 transitions. [2021-11-23 17:31:09,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:31:09,552 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2021-11-23 17:31:09,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:09,554 INFO L225 Difference]: With dead ends: 310 [2021-11-23 17:31:09,554 INFO L226 Difference]: Without dead ends: 194 [2021-11-23 17:31:09,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 60 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 17:31:09,556 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 28 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:09,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 494 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 168 Invalid, 0 Unknown, 16 Unchecked, 0.2s Time] [2021-11-23 17:31:09,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-11-23 17:31:09,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2021-11-23 17:31:09,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.4352331606217616) internal successors, (277), 193 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:09,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 277 transitions. [2021-11-23 17:31:09,576 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 277 transitions. Word has length 64 [2021-11-23 17:31:09,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:09,581 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 277 transitions. [2021-11-23 17:31:09,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:09,581 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 277 transitions. [2021-11-23 17:31:09,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 17:31:09,585 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:09,585 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] [2021-11-23 17:31:09,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:09,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:31:09,798 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:09,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:09,799 INFO L85 PathProgramCache]: Analyzing trace with hash 767343591, now seen corresponding path program 1 times [2021-11-23 17:31:09,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:09,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [22970333] [2021-11-23 17:31:09,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:09,800 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:09,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:09,804 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:09,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:31:09,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:09,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:31:09,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:11,019 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 17:31:11,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:31:11,020 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:11,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [22970333] [2021-11-23 17:31:11,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [22970333] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:31:11,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:31:11,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:31:11,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015636533] [2021-11-23 17:31:11,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:31:11,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 17:31:11,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:11,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 17:31:11,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:31:11,023 INFO L87 Difference]: Start difference. First operand 194 states and 277 transitions. Second operand has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:11,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:11,254 INFO L93 Difference]: Finished difference Result 310 states and 453 transitions. [2021-11-23 17:31:11,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 17:31:11,254 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-11-23 17:31:11,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:11,256 INFO L225 Difference]: With dead ends: 310 [2021-11-23 17:31:11,257 INFO L226 Difference]: Without dead ends: 227 [2021-11-23 17:31:11,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:31:11,258 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 48 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 236 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:11,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 891 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 142 Invalid, 0 Unknown, 236 Unchecked, 0.2s Time] [2021-11-23 17:31:11,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-11-23 17:31:11,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2021-11-23 17:31:11,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.4133333333333333) internal successors, (318), 225 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:11,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 318 transitions. [2021-11-23 17:31:11,280 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 318 transitions. Word has length 65 [2021-11-23 17:31:11,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:11,281 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 318 transitions. [2021-11-23 17:31:11,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:11,282 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 318 transitions. [2021-11-23 17:31:11,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 17:31:11,283 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:11,283 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] [2021-11-23 17:31:11,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:11,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:31:11,505 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:11,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:11,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1981002841, now seen corresponding path program 1 times [2021-11-23 17:31:11,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:11,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [835809912] [2021-11-23 17:31:11,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:11,506 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:11,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:11,507 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:11,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:31:11,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:11,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:31:11,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:12,428 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 17:31:12,428 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:31:12,428 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:12,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [835809912] [2021-11-23 17:31:12,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [835809912] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:31:12,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:31:12,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:31:12,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936204062] [2021-11-23 17:31:12,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:31:12,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 17:31:12,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:12,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 17:31:12,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:31:12,431 INFO L87 Difference]: Start difference. First operand 226 states and 318 transitions. Second operand has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:12,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:12,569 INFO L93 Difference]: Finished difference Result 331 states and 482 transitions. [2021-11-23 17:31:12,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 17:31:12,570 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-11-23 17:31:12,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:12,572 INFO L225 Difference]: With dead ends: 331 [2021-11-23 17:31:12,572 INFO L226 Difference]: Without dead ends: 236 [2021-11-23 17:31:12,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:31:12,574 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 36 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:12,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 563 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2021-11-23 17:31:12,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-23 17:31:12,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 235. [2021-11-23 17:31:12,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.3974358974358974) internal successors, (327), 234 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:12,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 327 transitions. [2021-11-23 17:31:12,589 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 327 transitions. Word has length 65 [2021-11-23 17:31:12,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:12,591 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 327 transitions. [2021-11-23 17:31:12,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:12,591 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 327 transitions. [2021-11-23 17:31:12,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 17:31:12,592 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:12,592 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] [2021-11-23 17:31:12,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:12,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:31:12,808 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:12,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:12,809 INFO L85 PathProgramCache]: Analyzing trace with hash 2109661127, now seen corresponding path program 1 times [2021-11-23 17:31:12,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:12,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2144308386] [2021-11-23 17:31:12,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:12,812 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:12,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:12,813 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:12,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:31:12,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:12,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:31:12,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:14,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:14,063 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:31:14,064 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:14,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2144308386] [2021-11-23 17:31:14,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2144308386] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:31:14,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:31:14,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:31:14,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770120305] [2021-11-23 17:31:14,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:31:14,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 17:31:14,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:14,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 17:31:14,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:31:14,066 INFO L87 Difference]: Start difference. First operand 235 states and 327 transitions. Second operand has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:14,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:14,098 INFO L93 Difference]: Finished difference Result 336 states and 481 transitions. [2021-11-23 17:31:14,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:31:14,099 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-11-23 17:31:14,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:14,104 INFO L225 Difference]: With dead ends: 336 [2021-11-23 17:31:14,105 INFO L226 Difference]: Without dead ends: 259 [2021-11-23 17:31:14,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:31:14,108 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 36 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:14,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 678 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 125 Unchecked, 0.0s Time] [2021-11-23 17:31:14,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-11-23 17:31:14,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 257. [2021-11-23 17:31:14,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.3828125) internal successors, (354), 256 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:14,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 354 transitions. [2021-11-23 17:31:14,124 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 354 transitions. Word has length 65 [2021-11-23 17:31:14,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:14,124 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 354 transitions. [2021-11-23 17:31:14,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:14,125 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 354 transitions. [2021-11-23 17:31:14,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 17:31:14,128 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:14,128 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] [2021-11-23 17:31:14,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:14,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:31:14,341 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:14,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:14,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1812219333, now seen corresponding path program 1 times [2021-11-23 17:31:14,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:14,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1729895611] [2021-11-23 17:31:14,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:14,342 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:14,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:14,345 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:14,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:31:14,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:14,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:31:14,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:14,997 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 17:31:14,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:31:14,998 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:14,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1729895611] [2021-11-23 17:31:14,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1729895611] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:31:14,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:31:14,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:31:14,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301872045] [2021-11-23 17:31:14,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:31:15,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:31:15,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:15,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:31:15,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:31:15,001 INFO L87 Difference]: Start difference. First operand 257 states and 354 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:15,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:15,150 INFO L93 Difference]: Finished difference Result 393 states and 563 transitions. [2021-11-23 17:31:15,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:31:15,151 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-11-23 17:31:15,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:15,153 INFO L225 Difference]: With dead ends: 393 [2021-11-23 17:31:15,153 INFO L226 Difference]: Without dead ends: 257 [2021-11-23 17:31:15,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 61 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 17:31:15,155 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 39 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:15,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 374 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 8 Unchecked, 0.1s Time] [2021-11-23 17:31:15,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-11-23 17:31:15,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2021-11-23 17:31:15,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.37890625) internal successors, (353), 256 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:15,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 353 transitions. [2021-11-23 17:31:15,170 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 353 transitions. Word has length 65 [2021-11-23 17:31:15,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:15,170 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 353 transitions. [2021-11-23 17:31:15,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:15,171 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 353 transitions. [2021-11-23 17:31:15,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-23 17:31:15,172 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:15,172 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] [2021-11-23 17:31:15,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:15,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:31:15,386 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:15,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:15,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1898666630, now seen corresponding path program 1 times [2021-11-23 17:31:15,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:15,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1643794777] [2021-11-23 17:31:15,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:15,387 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:15,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:15,388 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:15,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:31:15,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:15,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:31:15,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:15,904 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 17:31:15,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:31:15,904 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:15,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1643794777] [2021-11-23 17:31:15,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1643794777] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:31:15,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:31:15,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:31:15,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206258616] [2021-11-23 17:31:15,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:31:15,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:31:15,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:15,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:31:15,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:31:15,908 INFO L87 Difference]: Start difference. First operand 257 states and 353 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:16,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:16,036 INFO L93 Difference]: Finished difference Result 369 states and 530 transitions. [2021-11-23 17:31:16,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:31:16,037 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-11-23 17:31:16,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:16,039 INFO L225 Difference]: With dead ends: 369 [2021-11-23 17:31:16,039 INFO L226 Difference]: Without dead ends: 263 [2021-11-23 17:31:16,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 62 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 17:31:16,041 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 37 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:16,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 395 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 21 Unchecked, 0.1s Time] [2021-11-23 17:31:16,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-11-23 17:31:16,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 261. [2021-11-23 17:31:16,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.376923076923077) internal successors, (358), 260 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:16,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 358 transitions. [2021-11-23 17:31:16,057 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 358 transitions. Word has length 66 [2021-11-23 17:31:16,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:16,057 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 358 transitions. [2021-11-23 17:31:16,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:16,057 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 358 transitions. [2021-11-23 17:31:16,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-23 17:31:16,058 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:16,058 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] [2021-11-23 17:31:16,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:16,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:31:16,270 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:16,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:16,271 INFO L85 PathProgramCache]: Analyzing trace with hash -812854982, now seen corresponding path program 1 times [2021-11-23 17:31:16,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:16,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1814845100] [2021-11-23 17:31:16,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:16,272 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:16,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:16,275 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:16,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 17:31:16,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:16,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:31:16,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:17,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:17,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:31:17,215 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:17,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1814845100] [2021-11-23 17:31:17,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1814845100] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:31:17,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:31:17,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 17:31:17,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147455322] [2021-11-23 17:31:17,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:31:17,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:31:17,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:17,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:31:17,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:31:17,217 INFO L87 Difference]: Start difference. First operand 261 states and 358 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:17,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:17,377 INFO L93 Difference]: Finished difference Result 681 states and 1027 transitions. [2021-11-23 17:31:17,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:31:17,378 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-11-23 17:31:17,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:17,383 INFO L225 Difference]: With dead ends: 681 [2021-11-23 17:31:17,383 INFO L226 Difference]: Without dead ends: 605 [2021-11-23 17:31:17,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:31:17,384 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 835 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 908 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:17,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [835 Valid, 908 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:31:17,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-11-23 17:31:17,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 354. [2021-11-23 17:31:17,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 1.4362606232294617) internal successors, (507), 353 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:17,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 507 transitions. [2021-11-23 17:31:17,412 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 507 transitions. Word has length 66 [2021-11-23 17:31:17,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:17,412 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 507 transitions. [2021-11-23 17:31:17,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:17,413 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 507 transitions. [2021-11-23 17:31:17,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 17:31:17,414 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:17,414 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] [2021-11-23 17:31:17,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:17,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:31:17,626 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:17,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:17,627 INFO L85 PathProgramCache]: Analyzing trace with hash 308957109, now seen corresponding path program 1 times [2021-11-23 17:31:17,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:17,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [287021567] [2021-11-23 17:31:17,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:17,627 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:17,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:17,628 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:17,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 17:31:17,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:17,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:31:17,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:17,891 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 17:31:17,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:31:17,892 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:17,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [287021567] [2021-11-23 17:31:17,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [287021567] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:31:17,893 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:31:17,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:31:17,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594637476] [2021-11-23 17:31:17,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:31:17,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:31:17,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:17,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:31:17,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:31:17,896 INFO L87 Difference]: Start difference. First operand 354 states and 507 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:17,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:17,969 INFO L93 Difference]: Finished difference Result 508 states and 750 transitions. [2021-11-23 17:31:17,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:31:17,969 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2021-11-23 17:31:17,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:17,974 INFO L225 Difference]: With dead ends: 508 [2021-11-23 17:31:17,974 INFO L226 Difference]: Without dead ends: 506 [2021-11-23 17:31:17,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:31:17,975 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 230 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:17,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 719 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:31:17,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-11-23 17:31:18,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 358. [2021-11-23 17:31:18,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.4313725490196079) internal successors, (511), 357 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:18,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 511 transitions. [2021-11-23 17:31:18,006 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 511 transitions. Word has length 67 [2021-11-23 17:31:18,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:18,006 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 511 transitions. [2021-11-23 17:31:18,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:18,007 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 511 transitions. [2021-11-23 17:31:18,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-23 17:31:18,008 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:18,008 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] [2021-11-23 17:31:18,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:18,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:31:18,226 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:18,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:18,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1249029969, now seen corresponding path program 1 times [2021-11-23 17:31:18,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:18,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1744539591] [2021-11-23 17:31:18,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:18,227 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:18,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:18,228 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:18,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 17:31:18,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:18,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:31:18,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:18,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:18,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:31:18,595 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:18,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1744539591] [2021-11-23 17:31:18,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1744539591] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:31:18,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:31:18,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:31:18,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31738611] [2021-11-23 17:31:18,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:31:18,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:31:18,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:18,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:31:18,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:31:18,599 INFO L87 Difference]: Start difference. First operand 358 states and 511 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:18,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:18,647 INFO L93 Difference]: Finished difference Result 584 states and 867 transitions. [2021-11-23 17:31:18,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:31:18,648 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-11-23 17:31:18,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:18,651 INFO L225 Difference]: With dead ends: 584 [2021-11-23 17:31:18,651 INFO L226 Difference]: Without dead ends: 430 [2021-11-23 17:31:18,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:31:18,653 INFO L933 BasicCegarLoop]: 338 mSDtfsCounter, 162 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:18,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 785 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2021-11-23 17:31:18,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-11-23 17:31:18,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 427. [2021-11-23 17:31:18,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 1.4530516431924883) internal successors, (619), 426 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:18,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 619 transitions. [2021-11-23 17:31:18,690 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 619 transitions. Word has length 68 [2021-11-23 17:31:18,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:18,690 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 619 transitions. [2021-11-23 17:31:18,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:18,691 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 619 transitions. [2021-11-23 17:31:18,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-23 17:31:18,692 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:18,692 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] [2021-11-23 17:31:18,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:18,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:31:18,907 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:18,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:18,908 INFO L85 PathProgramCache]: Analyzing trace with hash -264834943, now seen corresponding path program 1 times [2021-11-23 17:31:18,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:18,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [445514293] [2021-11-23 17:31:18,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:18,909 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:18,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:18,910 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:18,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 17:31:19,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:19,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:31:19,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:19,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:19,135 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:31:19,136 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:19,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [445514293] [2021-11-23 17:31:19,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [445514293] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:31:19,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:31:19,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:31:19,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146019028] [2021-11-23 17:31:19,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:31:19,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:31:19,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:19,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:31:19,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:31:19,138 INFO L87 Difference]: Start difference. First operand 427 states and 619 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:19,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:19,213 INFO L93 Difference]: Finished difference Result 932 states and 1404 transitions. [2021-11-23 17:31:19,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:31:19,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-11-23 17:31:19,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:19,219 INFO L225 Difference]: With dead ends: 932 [2021-11-23 17:31:19,219 INFO L226 Difference]: Without dead ends: 691 [2021-11-23 17:31:19,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 66 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 17:31:19,221 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 151 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:19,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 464 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:31:19,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2021-11-23 17:31:19,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 689. [2021-11-23 17:31:19,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 688 states have (on average 1.4738372093023255) internal successors, (1014), 688 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:19,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 1014 transitions. [2021-11-23 17:31:19,273 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 1014 transitions. Word has length 68 [2021-11-23 17:31:19,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:19,273 INFO L470 AbstractCegarLoop]: Abstraction has 689 states and 1014 transitions. [2021-11-23 17:31:19,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:19,274 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 1014 transitions. [2021-11-23 17:31:19,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-23 17:31:19,276 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:19,276 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:31:19,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:19,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:31:19,495 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:19,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:19,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1299167488, now seen corresponding path program 1 times [2021-11-23 17:31:19,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:19,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2113372319] [2021-11-23 17:31:19,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:19,497 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:19,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:19,498 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:19,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 17:31:19,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:19,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:31:19,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:19,904 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 17:31:19,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:31:19,904 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:19,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2113372319] [2021-11-23 17:31:19,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2113372319] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:31:19,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:31:19,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:31:19,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888063774] [2021-11-23 17:31:19,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:31:19,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:31:19,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:19,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:31:19,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:31:19,908 INFO L87 Difference]: Start difference. First operand 689 states and 1014 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:20,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:20,673 INFO L93 Difference]: Finished difference Result 3572 states and 5488 transitions. [2021-11-23 17:31:20,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 17:31:20,674 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-11-23 17:31:20,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:20,696 INFO L225 Difference]: With dead ends: 3572 [2021-11-23 17:31:20,697 INFO L226 Difference]: Without dead ends: 3101 [2021-11-23 17:31:20,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 63 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 17:31:20,699 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 2074 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2074 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:20,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2074 Valid, 501 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 17:31:20,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3101 states. [2021-11-23 17:31:20,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3101 to 740. [2021-11-23 17:31:20,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 1.449255751014885) internal successors, (1071), 739 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:20,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1071 transitions. [2021-11-23 17:31:20,804 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1071 transitions. Word has length 68 [2021-11-23 17:31:20,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:20,804 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 1071 transitions. [2021-11-23 17:31:20,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:20,805 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1071 transitions. [2021-11-23 17:31:20,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-23 17:31:20,806 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:20,807 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] [2021-11-23 17:31:20,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-23 17:31:21,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:31:21,021 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:21,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:21,022 INFO L85 PathProgramCache]: Analyzing trace with hash 366553505, now seen corresponding path program 1 times [2021-11-23 17:31:21,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:21,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [533190665] [2021-11-23 17:31:21,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:21,023 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:21,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:21,024 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:21,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 17:31:21,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:21,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:31:21,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:21,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:21,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:31:21,439 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:21,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [533190665] [2021-11-23 17:31:21,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [533190665] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:31:21,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:31:21,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:31:21,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682399683] [2021-11-23 17:31:21,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:31:21,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:31:21,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:21,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:31:21,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:31:21,443 INFO L87 Difference]: Start difference. First operand 740 states and 1071 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:22,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:22,054 INFO L93 Difference]: Finished difference Result 2577 states and 3865 transitions. [2021-11-23 17:31:22,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 17:31:22,054 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-11-23 17:31:22,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:22,066 INFO L225 Difference]: With dead ends: 2577 [2021-11-23 17:31:22,067 INFO L226 Difference]: Without dead ends: 2070 [2021-11-23 17:31:22,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 63 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 17:31:22,070 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 1157 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1157 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:22,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1157 Valid, 427 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 17:31:22,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2070 states. [2021-11-23 17:31:22,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2070 to 775. [2021-11-23 17:31:22,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 1.4121447028423773) internal successors, (1093), 774 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:22,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1093 transitions. [2021-11-23 17:31:22,206 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1093 transitions. Word has length 68 [2021-11-23 17:31:22,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:22,206 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 1093 transitions. [2021-11-23 17:31:22,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:22,207 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1093 transitions. [2021-11-23 17:31:22,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-23 17:31:22,211 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:22,211 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] [2021-11-23 17:31:22,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:22,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:31:22,424 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:22,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:22,425 INFO L85 PathProgramCache]: Analyzing trace with hash -660438559, now seen corresponding path program 1 times [2021-11-23 17:31:22,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:22,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1129761906] [2021-11-23 17:31:22,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:22,426 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:22,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:22,428 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:22,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 17:31:22,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:22,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:31:22,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:22,669 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 17:31:22,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:31:22,670 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:22,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1129761906] [2021-11-23 17:31:22,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1129761906] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:31:22,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:31:22,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:31:22,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611017898] [2021-11-23 17:31:22,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:31:22,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:31:22,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:22,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:31:22,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:31:22,672 INFO L87 Difference]: Start difference. First operand 775 states and 1093 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:22,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:22,787 INFO L93 Difference]: Finished difference Result 1679 states and 2467 transitions. [2021-11-23 17:31:22,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:31:22,787 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-11-23 17:31:22,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:22,795 INFO L225 Difference]: With dead ends: 1679 [2021-11-23 17:31:22,795 INFO L226 Difference]: Without dead ends: 1204 [2021-11-23 17:31:22,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 66 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 17:31:22,797 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 167 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:22,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 469 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:31:22,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2021-11-23 17:31:22,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 1202. [2021-11-23 17:31:22,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1202 states, 1201 states have (on average 1.4462947543713571) internal successors, (1737), 1201 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:22,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1202 states to 1202 states and 1737 transitions. [2021-11-23 17:31:22,932 INFO L78 Accepts]: Start accepts. Automaton has 1202 states and 1737 transitions. Word has length 68 [2021-11-23 17:31:22,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:22,933 INFO L470 AbstractCegarLoop]: Abstraction has 1202 states and 1737 transitions. [2021-11-23 17:31:22,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:22,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1202 states and 1737 transitions. [2021-11-23 17:31:22,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-23 17:31:22,935 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:22,935 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] [2021-11-23 17:31:22,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:23,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:31:23,155 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:23,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:23,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1777284032, now seen corresponding path program 1 times [2021-11-23 17:31:23,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:23,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1623194324] [2021-11-23 17:31:23,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:23,157 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:23,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:23,158 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:23,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 17:31:23,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:23,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:31:23,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:23,407 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 17:31:23,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:31:23,408 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:23,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1623194324] [2021-11-23 17:31:23,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1623194324] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:31:23,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:31:23,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:31:23,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926381216] [2021-11-23 17:31:23,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:31:23,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:31:23,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:23,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:31:23,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:31:23,412 INFO L87 Difference]: Start difference. First operand 1202 states and 1737 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:23,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:23,653 INFO L93 Difference]: Finished difference Result 2840 states and 4203 transitions. [2021-11-23 17:31:23,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:31:23,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-11-23 17:31:23,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:23,666 INFO L225 Difference]: With dead ends: 2840 [2021-11-23 17:31:23,666 INFO L226 Difference]: Without dead ends: 2028 [2021-11-23 17:31:23,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 66 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 17:31:23,672 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 136 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:23,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 456 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:31:23,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2028 states. [2021-11-23 17:31:23,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2028 to 2026. [2021-11-23 17:31:23,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2026 states, 2025 states have (on average 1.4523456790123457) internal successors, (2941), 2025 states have internal predecessors, (2941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:23,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2026 states to 2026 states and 2941 transitions. [2021-11-23 17:31:23,899 INFO L78 Accepts]: Start accepts. Automaton has 2026 states and 2941 transitions. Word has length 68 [2021-11-23 17:31:23,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:23,900 INFO L470 AbstractCegarLoop]: Abstraction has 2026 states and 2941 transitions. [2021-11-23 17:31:23,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:23,900 INFO L276 IsEmpty]: Start isEmpty. Operand 2026 states and 2941 transitions. [2021-11-23 17:31:23,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-23 17:31:23,902 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:23,902 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] [2021-11-23 17:31:23,914 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-23 17:31:24,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:31:24,115 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:24,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:24,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1723613023, now seen corresponding path program 1 times [2021-11-23 17:31:24,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:24,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1968249001] [2021-11-23 17:31:24,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:24,117 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:24,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:24,118 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:24,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 17:31:24,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:24,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:31:24,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:24,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:24,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:31:24,519 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:24,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1968249001] [2021-11-23 17:31:24,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1968249001] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:31:24,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:31:24,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:31:24,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998532818] [2021-11-23 17:31:24,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:31:24,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:31:24,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:24,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:31:24,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:31:24,524 INFO L87 Difference]: Start difference. First operand 2026 states and 2941 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:25,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:25,920 INFO L93 Difference]: Finished difference Result 10430 states and 15336 transitions. [2021-11-23 17:31:25,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 17:31:25,920 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-11-23 17:31:25,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:25,970 INFO L225 Difference]: With dead ends: 10430 [2021-11-23 17:31:25,971 INFO L226 Difference]: Without dead ends: 8860 [2021-11-23 17:31:25,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 63 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 17:31:25,976 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 1618 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1618 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:25,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1618 Valid, 611 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 17:31:25,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8860 states. [2021-11-23 17:31:26,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8860 to 2278. [2021-11-23 17:31:26,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2278 states, 2277 states have (on average 1.417215634606939) internal successors, (3227), 2277 states have internal predecessors, (3227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:26,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2278 states to 2278 states and 3227 transitions. [2021-11-23 17:31:26,335 INFO L78 Accepts]: Start accepts. Automaton has 2278 states and 3227 transitions. Word has length 68 [2021-11-23 17:31:26,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:26,335 INFO L470 AbstractCegarLoop]: Abstraction has 2278 states and 3227 transitions. [2021-11-23 17:31:26,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:26,336 INFO L276 IsEmpty]: Start isEmpty. Operand 2278 states and 3227 transitions. [2021-11-23 17:31:26,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 17:31:26,338 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:26,338 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] [2021-11-23 17:31:26,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:26,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:31:26,549 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:26,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:26,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1627814641, now seen corresponding path program 1 times [2021-11-23 17:31:26,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:26,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1924097320] [2021-11-23 17:31:26,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:26,551 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:26,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:26,552 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:26,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 17:31:26,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:26,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:31:26,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:27,065 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 17:31:27,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:31:27,066 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:27,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1924097320] [2021-11-23 17:31:27,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1924097320] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:31:27,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:31:27,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:31:27,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031751432] [2021-11-23 17:31:27,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:31:27,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:31:27,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:27,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:31:27,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:31:27,069 INFO L87 Difference]: Start difference. First operand 2278 states and 3227 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:27,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:27,380 INFO L93 Difference]: Finished difference Result 3057 states and 4346 transitions. [2021-11-23 17:31:27,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:31:27,380 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-11-23 17:31:27,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:27,393 INFO L225 Difference]: With dead ends: 3057 [2021-11-23 17:31:27,393 INFO L226 Difference]: Without dead ends: 2278 [2021-11-23 17:31:27,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 65 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 17:31:27,396 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 37 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:27,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 383 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 16 Unchecked, 0.1s Time] [2021-11-23 17:31:27,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2278 states. [2021-11-23 17:31:27,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2278 to 2278. [2021-11-23 17:31:27,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2278 states, 2277 states have (on average 1.416776460254721) internal successors, (3226), 2277 states have internal predecessors, (3226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:27,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2278 states to 2278 states and 3226 transitions. [2021-11-23 17:31:27,670 INFO L78 Accepts]: Start accepts. Automaton has 2278 states and 3226 transitions. Word has length 69 [2021-11-23 17:31:27,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:27,670 INFO L470 AbstractCegarLoop]: Abstraction has 2278 states and 3226 transitions. [2021-11-23 17:31:27,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:27,671 INFO L276 IsEmpty]: Start isEmpty. Operand 2278 states and 3226 transitions. [2021-11-23 17:31:27,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 17:31:27,674 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:27,674 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] [2021-11-23 17:31:27,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:27,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:31:27,886 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:27,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:27,887 INFO L85 PathProgramCache]: Analyzing trace with hash 558054915, now seen corresponding path program 1 times [2021-11-23 17:31:27,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:27,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1575264124] [2021-11-23 17:31:27,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:27,888 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:27,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:27,889 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:27,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-23 17:31:27,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:28,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:31:28,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:28,295 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 17:31:28,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:31:28,296 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:28,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1575264124] [2021-11-23 17:31:28,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1575264124] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:31:28,296 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:31:28,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:31:28,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065794217] [2021-11-23 17:31:28,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:31:28,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:31:28,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:28,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:31:28,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:31:28,298 INFO L87 Difference]: Start difference. First operand 2278 states and 3226 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:29,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:29,587 INFO L93 Difference]: Finished difference Result 9276 states and 13302 transitions. [2021-11-23 17:31:29,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 17:31:29,587 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-11-23 17:31:29,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:29,630 INFO L225 Difference]: With dead ends: 9276 [2021-11-23 17:31:29,630 INFO L226 Difference]: Without dead ends: 7822 [2021-11-23 17:31:29,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 64 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 17:31:29,636 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 1313 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1313 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:29,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1313 Valid, 469 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 17:31:29,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7822 states. [2021-11-23 17:31:30,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7822 to 2568. [2021-11-23 17:31:30,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2568 states, 2567 states have (on average 1.3938449552006233) internal successors, (3578), 2567 states have internal predecessors, (3578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:30,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 3578 transitions. [2021-11-23 17:31:30,025 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 3578 transitions. Word has length 69 [2021-11-23 17:31:30,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:30,026 INFO L470 AbstractCegarLoop]: Abstraction has 2568 states and 3578 transitions. [2021-11-23 17:31:30,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:30,026 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 3578 transitions. [2021-11-23 17:31:30,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 17:31:30,030 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:30,030 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:31:30,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:30,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:31:30,243 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:30,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:30,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1568213221, now seen corresponding path program 1 times [2021-11-23 17:31:30,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:30,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2091336185] [2021-11-23 17:31:30,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:30,244 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:30,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:30,245 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:30,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-23 17:31:30,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:30,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:31:30,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:30,454 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 17:31:30,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:31:30,455 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:30,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2091336185] [2021-11-23 17:31:30,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2091336185] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:31:30,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:31:30,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:31:30,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781172088] [2021-11-23 17:31:30,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:31:30,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:31:30,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:30,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:31:30,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:31:30,456 INFO L87 Difference]: Start difference. First operand 2568 states and 3578 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:30,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:30,796 INFO L93 Difference]: Finished difference Result 4806 states and 6796 transitions. [2021-11-23 17:31:30,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:31:30,797 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-11-23 17:31:30,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:30,803 INFO L225 Difference]: With dead ends: 4806 [2021-11-23 17:31:30,803 INFO L226 Difference]: Without dead ends: 3744 [2021-11-23 17:31:30,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 67 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 17:31:30,807 INFO L933 BasicCegarLoop]: 283 mSDtfsCounter, 182 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:30,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 406 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:31:30,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3744 states. [2021-11-23 17:31:31,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3744 to 3730. [2021-11-23 17:31:31,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3730 states, 3729 states have (on average 1.4170018771788684) internal successors, (5284), 3729 states have internal predecessors, (5284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:31,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3730 states to 3730 states and 5284 transitions. [2021-11-23 17:31:31,420 INFO L78 Accepts]: Start accepts. Automaton has 3730 states and 5284 transitions. Word has length 69 [2021-11-23 17:31:31,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:31,420 INFO L470 AbstractCegarLoop]: Abstraction has 3730 states and 5284 transitions. [2021-11-23 17:31:31,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:31,421 INFO L276 IsEmpty]: Start isEmpty. Operand 3730 states and 5284 transitions. [2021-11-23 17:31:31,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 17:31:31,423 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:31,423 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] [2021-11-23 17:31:31,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:31,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:31:31,635 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:31,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:31,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1954670335, now seen corresponding path program 1 times [2021-11-23 17:31:31,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:31,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1532308265] [2021-11-23 17:31:31,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:31,636 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:31,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:31,637 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:31,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-23 17:31:31,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:31,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:31:31,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:32,045 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 17:31:32,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:31:32,046 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:32,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1532308265] [2021-11-23 17:31:32,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1532308265] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:31:32,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:31:32,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:31:32,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583398726] [2021-11-23 17:31:32,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:31:32,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:31:32,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:32,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:31:32,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:31:32,048 INFO L87 Difference]: Start difference. First operand 3730 states and 5284 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:32,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:32,475 INFO L93 Difference]: Finished difference Result 5084 states and 7230 transitions. [2021-11-23 17:31:32,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:31:32,478 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-11-23 17:31:32,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:32,483 INFO L225 Difference]: With dead ends: 5084 [2021-11-23 17:31:32,483 INFO L226 Difference]: Without dead ends: 3730 [2021-11-23 17:31:32,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 65 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 17:31:32,487 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 35 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:32,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 388 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 18 Unchecked, 0.1s Time] [2021-11-23 17:31:32,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3730 states. [2021-11-23 17:31:32,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3730 to 3730. [2021-11-23 17:31:33,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3730 states, 3729 states have (on average 1.416733708769107) internal successors, (5283), 3729 states have internal predecessors, (5283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:33,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3730 states to 3730 states and 5283 transitions. [2021-11-23 17:31:33,009 INFO L78 Accepts]: Start accepts. Automaton has 3730 states and 5283 transitions. Word has length 69 [2021-11-23 17:31:33,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:33,009 INFO L470 AbstractCegarLoop]: Abstraction has 3730 states and 5283 transitions. [2021-11-23 17:31:33,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:33,010 INFO L276 IsEmpty]: Start isEmpty. Operand 3730 states and 5283 transitions. [2021-11-23 17:31:33,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 17:31:33,013 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:33,013 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] [2021-11-23 17:31:33,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:33,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:31:33,226 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:33,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:33,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1060016565, now seen corresponding path program 1 times [2021-11-23 17:31:33,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:33,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [626141273] [2021-11-23 17:31:33,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:33,227 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:33,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:33,228 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:33,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-23 17:31:33,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:33,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:31:33,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:33,447 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 17:31:33,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:31:33,447 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:33,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [626141273] [2021-11-23 17:31:33,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [626141273] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:31:33,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:31:33,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:31:33,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293235011] [2021-11-23 17:31:33,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:31:33,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:31:33,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:33,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:31:33,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:31:33,452 INFO L87 Difference]: Start difference. First operand 3730 states and 5283 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:34,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:34,085 INFO L93 Difference]: Finished difference Result 9905 states and 14209 transitions. [2021-11-23 17:31:34,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:31:34,085 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-11-23 17:31:34,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:34,101 INFO L225 Difference]: With dead ends: 9905 [2021-11-23 17:31:34,101 INFO L226 Difference]: Without dead ends: 6581 [2021-11-23 17:31:34,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 67 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 17:31:34,107 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 182 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:34,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 334 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:31:34,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6581 states. [2021-11-23 17:31:34,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6581 to 6579. [2021-11-23 17:31:34,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6579 states, 6578 states have (on average 1.4255092733353603) internal successors, (9377), 6578 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 17:31:34,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6579 states to 6579 states and 9377 transitions. [2021-11-23 17:31:34,979 INFO L78 Accepts]: Start accepts. Automaton has 6579 states and 9377 transitions. Word has length 69 [2021-11-23 17:31:34,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:34,979 INFO L470 AbstractCegarLoop]: Abstraction has 6579 states and 9377 transitions. [2021-11-23 17:31:34,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:34,980 INFO L276 IsEmpty]: Start isEmpty. Operand 6579 states and 9377 transitions. [2021-11-23 17:31:34,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 17:31:34,984 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:34,984 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] [2021-11-23 17:31:35,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:35,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:31:35,197 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:35,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:35,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1020956696, now seen corresponding path program 1 times [2021-11-23 17:31:35,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:35,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1591211999] [2021-11-23 17:31:35,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:35,198 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:35,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:35,198 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:35,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-23 17:31:35,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:35,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:31:35,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:35,381 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 17:31:35,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:31:35,381 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:35,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1591211999] [2021-11-23 17:31:35,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1591211999] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:31:35,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:31:35,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:31:35,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029966950] [2021-11-23 17:31:35,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:31:35,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:31:35,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:35,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:31:35,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:31:35,383 INFO L87 Difference]: Start difference. First operand 6579 states and 9377 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:36,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:36,396 INFO L93 Difference]: Finished difference Result 17041 states and 24479 transitions. [2021-11-23 17:31:36,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:31:36,396 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-11-23 17:31:36,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:36,420 INFO L225 Difference]: With dead ends: 17041 [2021-11-23 17:31:36,420 INFO L226 Difference]: Without dead ends: 11390 [2021-11-23 17:31:36,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 67 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 17:31:36,431 INFO L933 BasicCegarLoop]: 311 mSDtfsCounter, 146 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:36,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 516 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:31:36,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11390 states. [2021-11-23 17:31:37,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11390 to 11340. [2021-11-23 17:31:37,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11340 states, 11339 states have (on average 1.4171443689919745) internal successors, (16069), 11339 states have internal predecessors, (16069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:37,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11340 states to 11340 states and 16069 transitions. [2021-11-23 17:31:37,866 INFO L78 Accepts]: Start accepts. Automaton has 11340 states and 16069 transitions. Word has length 69 [2021-11-23 17:31:37,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:37,867 INFO L470 AbstractCegarLoop]: Abstraction has 11340 states and 16069 transitions. [2021-11-23 17:31:37,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:37,867 INFO L276 IsEmpty]: Start isEmpty. Operand 11340 states and 16069 transitions. [2021-11-23 17:31:37,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 17:31:37,874 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:37,874 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] [2021-11-23 17:31:37,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:38,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:31:38,087 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:38,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:38,087 INFO L85 PathProgramCache]: Analyzing trace with hash 378456621, now seen corresponding path program 1 times [2021-11-23 17:31:38,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:38,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [532718108] [2021-11-23 17:31:38,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:38,088 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:38,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:38,089 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:38,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-23 17:31:38,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:38,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:31:38,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:39,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:39,256 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:31:39,256 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:39,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [532718108] [2021-11-23 17:31:39,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [532718108] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:31:39,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:31:39,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:31:39,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268466714] [2021-11-23 17:31:39,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:31:39,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 17:31:39,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:39,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 17:31:39,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:31:39,258 INFO L87 Difference]: Start difference. First operand 11340 states and 16069 transitions. Second operand has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:40,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:40,256 INFO L93 Difference]: Finished difference Result 13666 states and 19313 transitions. [2021-11-23 17:31:40,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:31:40,257 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2021-11-23 17:31:40,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:40,279 INFO L225 Difference]: With dead ends: 13666 [2021-11-23 17:31:40,279 INFO L226 Difference]: Without dead ends: 11355 [2021-11-23 17:31:40,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:31:40,287 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 44 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 182 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:40,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 797 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 182 Unchecked, 0.0s Time] [2021-11-23 17:31:40,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11355 states. [2021-11-23 17:31:41,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11355 to 11355. [2021-11-23 17:31:41,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11355 states, 11354 states have (on average 1.416857495155892) internal successors, (16087), 11354 states have internal predecessors, (16087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:41,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11355 states to 11355 states and 16087 transitions. [2021-11-23 17:31:41,676 INFO L78 Accepts]: Start accepts. Automaton has 11355 states and 16087 transitions. Word has length 70 [2021-11-23 17:31:41,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:41,677 INFO L470 AbstractCegarLoop]: Abstraction has 11355 states and 16087 transitions. [2021-11-23 17:31:41,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:41,678 INFO L276 IsEmpty]: Start isEmpty. Operand 11355 states and 16087 transitions. [2021-11-23 17:31:41,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 17:31:41,684 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:41,684 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] [2021-11-23 17:31:41,697 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-11-23 17:31:41,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:31:41,897 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:41,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:41,898 INFO L85 PathProgramCache]: Analyzing trace with hash -969824756, now seen corresponding path program 1 times [2021-11-23 17:31:41,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:41,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [406122752] [2021-11-23 17:31:41,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:41,898 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:41,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:41,899 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:41,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-23 17:31:41,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:41,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:31:41,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:42,566 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 17:31:42,567 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:31:42,567 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:42,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [406122752] [2021-11-23 17:31:42,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [406122752] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:31:42,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:31:42,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:31:42,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238192553] [2021-11-23 17:31:42,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:31:42,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 17:31:42,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:42,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 17:31:42,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:31:42,569 INFO L87 Difference]: Start difference. First operand 11355 states and 16087 transitions. Second operand has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:43,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:43,702 INFO L93 Difference]: Finished difference Result 13620 states and 19243 transitions. [2021-11-23 17:31:43,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 17:31:43,703 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2021-11-23 17:31:43,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:43,719 INFO L225 Difference]: With dead ends: 13620 [2021-11-23 17:31:43,719 INFO L226 Difference]: Without dead ends: 11361 [2021-11-23 17:31:43,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:31:43,726 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 73 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 317 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:43,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 892 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 317 Unchecked, 0.1s Time] [2021-11-23 17:31:43,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11361 states. [2021-11-23 17:31:45,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11361 to 11355. [2021-11-23 17:31:45,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11355 states, 11354 states have (on average 1.4167694204685573) internal successors, (16086), 11354 states have internal predecessors, (16086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:45,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11355 states to 11355 states and 16086 transitions. [2021-11-23 17:31:45,463 INFO L78 Accepts]: Start accepts. Automaton has 11355 states and 16086 transitions. Word has length 70 [2021-11-23 17:31:45,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:45,463 INFO L470 AbstractCegarLoop]: Abstraction has 11355 states and 16086 transitions. [2021-11-23 17:31:45,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:45,464 INFO L276 IsEmpty]: Start isEmpty. Operand 11355 states and 16086 transitions. [2021-11-23 17:31:45,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 17:31:45,469 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:45,469 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] [2021-11-23 17:31:45,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:45,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:31:45,683 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:45,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:45,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1286369927, now seen corresponding path program 1 times [2021-11-23 17:31:45,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:45,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2024797773] [2021-11-23 17:31:45,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:45,684 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:45,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:45,684 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:45,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-23 17:31:45,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:45,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:31:45,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:46,103 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 17:31:46,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:31:46,104 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:46,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2024797773] [2021-11-23 17:31:46,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2024797773] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:31:46,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:31:46,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:31:46,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247286025] [2021-11-23 17:31:46,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:31:46,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:31:46,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:46,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:31:46,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:31:46,106 INFO L87 Difference]: Start difference. First operand 11355 states and 16086 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:47,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:47,285 INFO L93 Difference]: Finished difference Result 22175 states and 31559 transitions. [2021-11-23 17:31:47,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:31:47,286 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2021-11-23 17:31:47,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:47,301 INFO L225 Difference]: With dead ends: 22175 [2021-11-23 17:31:47,301 INFO L226 Difference]: Without dead ends: 11355 [2021-11-23 17:31:47,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 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 17:31:47,316 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 36 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:47,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 356 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 11 Unchecked, 0.1s Time] [2021-11-23 17:31:47,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11355 states. [2021-11-23 17:31:48,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11355 to 11355. [2021-11-23 17:31:48,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11355 states, 11354 states have (on average 1.4166813457812224) internal successors, (16085), 11354 states have internal predecessors, (16085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:48,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11355 states to 11355 states and 16085 transitions. [2021-11-23 17:31:48,430 INFO L78 Accepts]: Start accepts. Automaton has 11355 states and 16085 transitions. Word has length 70 [2021-11-23 17:31:48,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:48,430 INFO L470 AbstractCegarLoop]: Abstraction has 11355 states and 16085 transitions. [2021-11-23 17:31:48,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:48,431 INFO L276 IsEmpty]: Start isEmpty. Operand 11355 states and 16085 transitions. [2021-11-23 17:31:48,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 17:31:48,436 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:48,437 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] [2021-11-23 17:31:48,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:48,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:31:48,651 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:48,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:48,651 INFO L85 PathProgramCache]: Analyzing trace with hash -87757686, now seen corresponding path program 1 times [2021-11-23 17:31:48,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:48,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1249775143] [2021-11-23 17:31:48,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:48,653 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:48,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:48,654 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:48,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-23 17:31:48,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:48,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:31:48,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:49,097 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 17:31:49,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:31:49,097 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:49,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1249775143] [2021-11-23 17:31:49,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1249775143] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:31:49,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:31:49,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:31:49,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084482397] [2021-11-23 17:31:49,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:31:49,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:31:49,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:49,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:31:49,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:31:49,100 INFO L87 Difference]: Start difference. First operand 11355 states and 16085 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:50,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:50,267 INFO L93 Difference]: Finished difference Result 13714 states and 19338 transitions. [2021-11-23 17:31:50,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:31:50,268 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2021-11-23 17:31:50,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:50,282 INFO L225 Difference]: With dead ends: 13714 [2021-11-23 17:31:50,282 INFO L226 Difference]: Without dead ends: 11355 [2021-11-23 17:31:50,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 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 17:31:50,287 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 32 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:50,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 375 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 17 Unchecked, 0.1s Time] [2021-11-23 17:31:50,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11355 states. [2021-11-23 17:31:51,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11355 to 11355. [2021-11-23 17:31:51,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11355 states, 11354 states have (on average 1.4165932710938876) internal successors, (16084), 11354 states have internal predecessors, (16084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:51,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11355 states to 11355 states and 16084 transitions. [2021-11-23 17:31:51,347 INFO L78 Accepts]: Start accepts. Automaton has 11355 states and 16084 transitions. Word has length 70 [2021-11-23 17:31:51,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:51,348 INFO L470 AbstractCegarLoop]: Abstraction has 11355 states and 16084 transitions. [2021-11-23 17:31:51,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:51,348 INFO L276 IsEmpty]: Start isEmpty. Operand 11355 states and 16084 transitions. [2021-11-23 17:31:51,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 17:31:51,354 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:51,354 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:31:51,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:51,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:31:51,567 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:51,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:51,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1215020811, now seen corresponding path program 1 times [2021-11-23 17:31:51,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:51,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [604452665] [2021-11-23 17:31:51,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:51,569 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:51,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:51,570 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:51,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-23 17:31:51,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:51,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:31:51,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:51,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:51,967 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:31:51,967 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:51,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [604452665] [2021-11-23 17:31:51,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [604452665] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:31:51,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:31:51,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:31:51,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041095927] [2021-11-23 17:31:51,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:31:51,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:31:51,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:51,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:31:51,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:31:51,969 INFO L87 Difference]: Start difference. First operand 11355 states and 16084 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:53,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:53,387 INFO L93 Difference]: Finished difference Result 16059 states and 22775 transitions. [2021-11-23 17:31:53,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:31:53,388 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2021-11-23 17:31:53,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:53,404 INFO L225 Difference]: With dead ends: 16059 [2021-11-23 17:31:53,404 INFO L226 Difference]: Without dead ends: 11347 [2021-11-23 17:31:53,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 67 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 17:31:53,413 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 35 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:53,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 376 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 17 Unchecked, 0.1s Time] [2021-11-23 17:31:53,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11347 states. [2021-11-23 17:31:54,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11347 to 11347. [2021-11-23 17:31:54,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11347 states, 11346 states have (on average 1.4167107350608144) internal successors, (16074), 11346 states have internal predecessors, (16074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:54,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11347 states to 11347 states and 16074 transitions. [2021-11-23 17:31:54,604 INFO L78 Accepts]: Start accepts. Automaton has 11347 states and 16074 transitions. Word has length 71 [2021-11-23 17:31:54,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:54,604 INFO L470 AbstractCegarLoop]: Abstraction has 11347 states and 16074 transitions. [2021-11-23 17:31:54,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:54,605 INFO L276 IsEmpty]: Start isEmpty. Operand 11347 states and 16074 transitions. [2021-11-23 17:31:54,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 17:31:54,610 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:54,610 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] [2021-11-23 17:31:54,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:54,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:31:54,823 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:54,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:54,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1101674246, now seen corresponding path program 1 times [2021-11-23 17:31:54,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:54,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1285758482] [2021-11-23 17:31:54,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:54,824 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:54,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:54,825 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:54,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-23 17:31:54,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:54,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:31:54,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:55,428 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 17:31:55,428 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:31:55,428 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:55,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1285758482] [2021-11-23 17:31:55,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1285758482] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:31:55,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:31:55,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 17:31:55,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363429018] [2021-11-23 17:31:55,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:31:55,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:31:55,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:55,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:31:55,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:31:55,430 INFO L87 Difference]: Start difference. First operand 11347 states and 16074 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:58,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:58,073 INFO L93 Difference]: Finished difference Result 33860 states and 48720 transitions. [2021-11-23 17:31:58,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:31:58,073 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2021-11-23 17:31:58,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:58,119 INFO L225 Difference]: With dead ends: 33860 [2021-11-23 17:31:58,119 INFO L226 Difference]: Without dead ends: 27140 [2021-11-23 17:31:58,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:31:58,136 INFO L933 BasicCegarLoop]: 339 mSDtfsCounter, 721 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 969 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:58,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [721 Valid, 969 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:31:58,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27140 states. [2021-11-23 17:31:59,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27140 to 14379. [2021-11-23 17:31:59,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14379 states, 14378 states have (on average 1.4154263458060927) internal successors, (20351), 14378 states have internal predecessors, (20351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:59,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14379 states to 14379 states and 20351 transitions. [2021-11-23 17:31:59,745 INFO L78 Accepts]: Start accepts. Automaton has 14379 states and 20351 transitions. Word has length 71 [2021-11-23 17:31:59,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:59,746 INFO L470 AbstractCegarLoop]: Abstraction has 14379 states and 20351 transitions. [2021-11-23 17:31:59,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:59,746 INFO L276 IsEmpty]: Start isEmpty. Operand 14379 states and 20351 transitions. [2021-11-23 17:31:59,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 17:31:59,751 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:59,751 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] [2021-11-23 17:31:59,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:59,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:31:59,963 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:59,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:59,964 INFO L85 PathProgramCache]: Analyzing trace with hash -680975913, now seen corresponding path program 1 times [2021-11-23 17:31:59,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:59,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1477292917] [2021-11-23 17:31:59,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:59,964 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:59,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:59,965 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:59,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-23 17:32:00,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:32:00,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:32:00,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:00,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:00,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:32:00,557 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:32:00,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1477292917] [2021-11-23 17:32:00,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1477292917] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:32:00,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:32:00,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 17:32:00,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161772046] [2021-11-23 17:32:00,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:32:00,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:32:00,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:32:00,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:32:00,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:32:00,560 INFO L87 Difference]: Start difference. First operand 14379 states and 20351 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:03,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:32:03,663 INFO L93 Difference]: Finished difference Result 36872 states and 52965 transitions. [2021-11-23 17:32:03,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:32:03,664 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2021-11-23 17:32:03,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:32:03,711 INFO L225 Difference]: With dead ends: 36872 [2021-11-23 17:32:03,711 INFO L226 Difference]: Without dead ends: 30166 [2021-11-23 17:32:03,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:32:03,726 INFO L933 BasicCegarLoop]: 331 mSDtfsCounter, 950 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 950 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:32:03,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [950 Valid, 935 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:32:03,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30166 states. [2021-11-23 17:32:05,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30166 to 16798. [2021-11-23 17:32:05,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16798 states, 16797 states have (on average 1.4155503959040305) internal successors, (23777), 16797 states have internal predecessors, (23777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:05,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16798 states to 16798 states and 23777 transitions. [2021-11-23 17:32:05,635 INFO L78 Accepts]: Start accepts. Automaton has 16798 states and 23777 transitions. Word has length 71 [2021-11-23 17:32:05,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:32:05,636 INFO L470 AbstractCegarLoop]: Abstraction has 16798 states and 23777 transitions. [2021-11-23 17:32:05,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:05,636 INFO L276 IsEmpty]: Start isEmpty. Operand 16798 states and 23777 transitions. [2021-11-23 17:32:05,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 17:32:05,640 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:32:05,640 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] [2021-11-23 17:32:05,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-23 17:32:05,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:32:05,844 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:32:05,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:32:05,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1354216356, now seen corresponding path program 1 times [2021-11-23 17:32:05,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:32:05,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1763369121] [2021-11-23 17:32:05,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:32:05,845 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:32:05,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:32:05,846 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:32:05,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-23 17:32:05,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:32:05,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:32:05,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:06,884 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 17:32:06,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:32:06,885 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:32:06,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1763369121] [2021-11-23 17:32:06,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1763369121] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:32:06,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:32:06,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:32:06,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946101787] [2021-11-23 17:32:06,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:32:06,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 17:32:06,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:32:06,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 17:32:06,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:32:06,887 INFO L87 Difference]: Start difference. First operand 16798 states and 23777 transitions. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:08,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:32:08,884 INFO L93 Difference]: Finished difference Result 32094 states and 45680 transitions. [2021-11-23 17:32:08,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 17:32:08,885 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2021-11-23 17:32:08,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:32:08,908 INFO L225 Difference]: With dead ends: 32094 [2021-11-23 17:32:08,908 INFO L226 Difference]: Without dead ends: 16870 [2021-11-23 17:32:08,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:32:08,924 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 78 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:32:08,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 564 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 92 Unchecked, 0.1s Time] [2021-11-23 17:32:08,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16870 states. [2021-11-23 17:32:10,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16870 to 16870. [2021-11-23 17:32:10,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16870 states, 16869 states have (on average 1.4147252356393385) internal successors, (23865), 16869 states have internal predecessors, (23865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:10,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16870 states to 16870 states and 23865 transitions. [2021-11-23 17:32:10,643 INFO L78 Accepts]: Start accepts. Automaton has 16870 states and 23865 transitions. Word has length 71 [2021-11-23 17:32:10,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:32:10,644 INFO L470 AbstractCegarLoop]: Abstraction has 16870 states and 23865 transitions. [2021-11-23 17:32:10,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:10,644 INFO L276 IsEmpty]: Start isEmpty. Operand 16870 states and 23865 transitions. [2021-11-23 17:32:10,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 17:32:10,648 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:32:10,648 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] [2021-11-23 17:32:10,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-23 17:32:10,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:32:10,849 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:32:10,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:32:10,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1992945285, now seen corresponding path program 1 times [2021-11-23 17:32:10,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:32:10,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [436151014] [2021-11-23 17:32:10,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:32:10,850 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:32:10,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:32:10,851 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:32:10,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-23 17:32:10,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:32:10,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:32:10,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:12,087 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 17:32:12,088 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:32:12,088 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:32:12,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [436151014] [2021-11-23 17:32:12,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [436151014] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:32:12,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:32:12,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:32:12,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366537407] [2021-11-23 17:32:12,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:32:12,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 17:32:12,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:32:12,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 17:32:12,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:32:12,090 INFO L87 Difference]: Start difference. First operand 16870 states and 23865 transitions. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:13,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:32:13,689 INFO L93 Difference]: Finished difference Result 19587 states and 27614 transitions. [2021-11-23 17:32:13,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:32:13,690 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2021-11-23 17:32:13,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:32:13,715 INFO L225 Difference]: With dead ends: 19587 [2021-11-23 17:32:13,715 INFO L226 Difference]: Without dead ends: 16866 [2021-11-23 17:32:13,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:32:13,723 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 55 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:32:13,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 706 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 109 Unchecked, 0.0s Time] [2021-11-23 17:32:13,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16866 states. [2021-11-23 17:32:15,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16866 to 16866. [2021-11-23 17:32:15,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16866 states, 16865 states have (on average 1.4147050103765195) internal successors, (23859), 16865 states have internal predecessors, (23859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:15,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16866 states to 16866 states and 23859 transitions. [2021-11-23 17:32:15,574 INFO L78 Accepts]: Start accepts. Automaton has 16866 states and 23859 transitions. Word has length 71 [2021-11-23 17:32:15,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:32:15,574 INFO L470 AbstractCegarLoop]: Abstraction has 16866 states and 23859 transitions. [2021-11-23 17:32:15,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:15,575 INFO L276 IsEmpty]: Start isEmpty. Operand 16866 states and 23859 transitions. [2021-11-23 17:32:15,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 17:32:15,580 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:32:15,580 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] [2021-11-23 17:32:15,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-23 17:32:15,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:32:15,785 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:32:15,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:32:15,785 INFO L85 PathProgramCache]: Analyzing trace with hash -997105045, now seen corresponding path program 1 times [2021-11-23 17:32:15,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:32:15,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [208939729] [2021-11-23 17:32:15,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:32:15,786 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:32:15,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:32:15,786 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:32:15,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-23 17:32:15,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:32:15,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:32:15,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:15,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:15,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:32:15,977 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:32:15,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [208939729] [2021-11-23 17:32:15,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [208939729] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:32:15,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:32:15,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:32:15,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981140610] [2021-11-23 17:32:15,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:32:15,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:32:15,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:32:15,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:32:15,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:32:15,979 INFO L87 Difference]: Start difference. First operand 16866 states and 23859 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:19,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:32:19,335 INFO L93 Difference]: Finished difference Result 38831 states and 55134 transitions. [2021-11-23 17:32:19,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:32:19,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2021-11-23 17:32:19,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:32:19,384 INFO L225 Difference]: With dead ends: 38831 [2021-11-23 17:32:19,384 INFO L226 Difference]: Without dead ends: 31194 [2021-11-23 17:32:19,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 69 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 17:32:19,394 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 165 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:32:19,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 326 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:32:19,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31194 states. [2021-11-23 17:32:22,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31194 to 31056. [2021-11-23 17:32:22,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31056 states, 31055 states have (on average 1.4237642891643858) internal successors, (44215), 31055 states have internal predecessors, (44215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:23,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31056 states to 31056 states and 44215 transitions. [2021-11-23 17:32:23,016 INFO L78 Accepts]: Start accepts. Automaton has 31056 states and 44215 transitions. Word has length 71 [2021-11-23 17:32:23,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:32:23,016 INFO L470 AbstractCegarLoop]: Abstraction has 31056 states and 44215 transitions. [2021-11-23 17:32:23,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:23,016 INFO L276 IsEmpty]: Start isEmpty. Operand 31056 states and 44215 transitions. [2021-11-23 17:32:23,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 17:32:23,020 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:32:23,020 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] [2021-11-23 17:32:23,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-23 17:32:23,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:32:23,221 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:32:23,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:32:23,221 INFO L85 PathProgramCache]: Analyzing trace with hash 96745802, now seen corresponding path program 1 times [2021-11-23 17:32:23,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:32:23,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [793869991] [2021-11-23 17:32:23,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:32:23,222 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:32:23,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:32:23,222 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:32:23,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-23 17:32:23,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:32:23,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:32:23,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:23,688 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 17:32:23,689 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:32:23,689 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:32:23,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [793869991] [2021-11-23 17:32:23,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [793869991] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:32:23,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:32:23,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:32:23,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946523350] [2021-11-23 17:32:23,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:32:23,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:32:23,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:32:23,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:32:23,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:32:23,690 INFO L87 Difference]: Start difference. First operand 31056 states and 44215 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:27,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:32:27,249 INFO L93 Difference]: Finished difference Result 44929 states and 63707 transitions. [2021-11-23 17:32:27,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:32:27,249 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2021-11-23 17:32:27,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:32:27,305 INFO L225 Difference]: With dead ends: 44929 [2021-11-23 17:32:27,305 INFO L226 Difference]: Without dead ends: 31056 [2021-11-23 17:32:27,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 67 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 17:32:27,322 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 34 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:32:27,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 357 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 13 Unchecked, 0.1s Time] [2021-11-23 17:32:27,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31056 states. [2021-11-23 17:32:31,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31056 to 31056. [2021-11-23 17:32:31,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31056 states, 31055 states have (on average 1.4237320882305586) internal successors, (44214), 31055 states have internal predecessors, (44214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:31,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31056 states to 31056 states and 44214 transitions. [2021-11-23 17:32:31,486 INFO L78 Accepts]: Start accepts. Automaton has 31056 states and 44214 transitions. Word has length 71 [2021-11-23 17:32:31,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:32:31,486 INFO L470 AbstractCegarLoop]: Abstraction has 31056 states and 44214 transitions. [2021-11-23 17:32:31,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:31,487 INFO L276 IsEmpty]: Start isEmpty. Operand 31056 states and 44214 transitions. [2021-11-23 17:32:31,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-23 17:32:31,491 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:32:31,491 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:32:31,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-23 17:32:31,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:32:31,692 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:32:31,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:32:31,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1653357182, now seen corresponding path program 1 times [2021-11-23 17:32:31,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:32:31,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [18121718] [2021-11-23 17:32:31,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:32:31,693 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:32:31,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:32:31,694 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:32:31,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-23 17:32:31,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:32:31,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:32:31,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:32,210 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 17:32:32,210 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:32:32,211 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:32:32,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [18121718] [2021-11-23 17:32:32,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [18121718] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:32:32,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:32:32,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:32:32,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010906637] [2021-11-23 17:32:32,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:32:32,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:32:32,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:32:32,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:32:32,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:32:32,213 INFO L87 Difference]: Start difference. First operand 31056 states and 44214 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:35,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:32:35,933 INFO L93 Difference]: Finished difference Result 42905 states and 60868 transitions. [2021-11-23 17:32:35,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:32:35,934 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-23 17:32:35,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:32:35,991 INFO L225 Difference]: With dead ends: 42905 [2021-11-23 17:32:35,991 INFO L226 Difference]: Without dead ends: 31056 [2021-11-23 17:32:36,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:32:36,006 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 25 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:32:36,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 559 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 128 Invalid, 0 Unknown, 81 Unchecked, 0.2s Time] [2021-11-23 17:32:36,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31056 states. [2021-11-23 17:32:40,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31056 to 31056. [2021-11-23 17:32:40,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31056 states, 31055 states have (on average 1.4236998872967317) internal successors, (44213), 31055 states have internal predecessors, (44213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:40,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31056 states to 31056 states and 44213 transitions. [2021-11-23 17:32:40,597 INFO L78 Accepts]: Start accepts. Automaton has 31056 states and 44213 transitions. Word has length 72 [2021-11-23 17:32:40,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:32:40,598 INFO L470 AbstractCegarLoop]: Abstraction has 31056 states and 44213 transitions. [2021-11-23 17:32:40,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:40,598 INFO L276 IsEmpty]: Start isEmpty. Operand 31056 states and 44213 transitions. [2021-11-23 17:32:40,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-23 17:32:40,602 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:32:40,602 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:32:40,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-23 17:32:40,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:32:40,803 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:32:40,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:32:40,804 INFO L85 PathProgramCache]: Analyzing trace with hash 200331549, now seen corresponding path program 1 times [2021-11-23 17:32:40,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:32:40,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1894152101] [2021-11-23 17:32:40,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:32:40,805 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:32:40,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:32:40,806 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:32:40,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b2d2701-df9d-46e6-bcfc-6f57fca8a0ae/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-23 17:32:40,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:32:40,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:32:40,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:41,633 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 17:32:41,633 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:32:41,633 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:32:41,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1894152101] [2021-11-23 17:32:41,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1894152101] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:32:41,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:32:41,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 17:32:41,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189505485] [2021-11-23 17:32:41,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:32:41,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:32:41,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:32:41,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:32:41,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:32:41,637 INFO L87 Difference]: Start difference. First operand 31056 states and 44213 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:50,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:32:50,168 INFO L93 Difference]: Finished difference Result 75932 states and 109270 transitions. [2021-11-23 17:32:50,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:32:50,169 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-23 17:32:50,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:32:50,300 INFO L225 Difference]: With dead ends: 75932 [2021-11-23 17:32:50,300 INFO L226 Difference]: Without dead ends: 62866 [2021-11-23 17:32:50,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:32:50,330 INFO L933 BasicCegarLoop]: 349 mSDtfsCounter, 629 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 1053 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:32:50,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [629 Valid, 1053 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:32:50,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62866 states.