./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label21.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172c0f5c-eb3c-4e93-8a59-afbc7f769a1a/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172c0f5c-eb3c-4e93-8a59-afbc7f769a1a/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172c0f5c-eb3c-4e93-8a59-afbc7f769a1a/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172c0f5c-eb3c-4e93-8a59-afbc7f769a1a/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label21.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172c0f5c-eb3c-4e93-8a59-afbc7f769a1a/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172c0f5c-eb3c-4e93-8a59-afbc7f769a1a/bin/uautomizer-IVEQpCNsaX --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 14f7b86bfc883455824a54ae68bb832997924960967cf306b251b3f457d9ff4b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:39:22,671 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:39:22,675 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:39:22,750 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:39:22,751 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:39:22,757 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:39:22,760 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:39:22,765 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:39:22,769 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:39:22,776 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:39:22,778 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:39:22,780 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:39:22,781 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:39:22,785 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:39:22,788 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:39:22,794 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:39:22,797 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:39:22,798 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:39:22,801 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:39:22,811 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:39:22,814 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:39:22,816 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:39:22,820 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:39:22,822 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:39:22,833 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:39:22,834 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:39:22,835 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:39:22,837 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:39:22,838 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:39:22,840 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:39:22,841 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:39:22,842 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:39:22,845 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:39:22,847 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:39:22,850 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:39:22,850 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:39:22,851 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:39:22,852 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:39:22,852 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:39:22,854 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:39:22,855 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:39:22,856 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172c0f5c-eb3c-4e93-8a59-afbc7f769a1a/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 09:39:22,916 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:39:22,917 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:39:22,918 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:39:22,926 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:39:22,928 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:39:22,929 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:39:22,929 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:39:22,929 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:39:22,930 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:39:22,930 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:39:22,931 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:39:22,932 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:39:22,932 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 09:39:22,932 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:39:22,932 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 09:39:22,933 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:39:22,933 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 09:39:22,933 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:39:22,934 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 09:39:22,934 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:39:22,934 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:39:22,935 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:39:22,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:39:22,935 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:39:22,936 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:39:22,936 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 09:39:22,936 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:39:22,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:39:22,937 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 09:39:22,939 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 09:39:22,939 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 09:39:22,940 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:39:22,940 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_172c0f5c-eb3c-4e93-8a59-afbc7f769a1a/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172c0f5c-eb3c-4e93-8a59-afbc7f769a1a/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14f7b86bfc883455824a54ae68bb832997924960967cf306b251b3f457d9ff4b [2021-11-09 09:39:23,356 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:39:23,410 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:39:23,413 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:39:23,415 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:39:23,416 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:39:23,418 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172c0f5c-eb3c-4e93-8a59-afbc7f769a1a/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/eca-rers2012/Problem13_label21.c [2021-11-09 09:39:23,518 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172c0f5c-eb3c-4e93-8a59-afbc7f769a1a/bin/uautomizer-IVEQpCNsaX/data/0f6c9fdf7/87c6c435785b480ba7883554c1c2ee30/FLAGd971b53c7 [2021-11-09 09:39:24,728 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:39:24,729 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172c0f5c-eb3c-4e93-8a59-afbc7f769a1a/sv-benchmarks/c/eca-rers2012/Problem13_label21.c [2021-11-09 09:39:24,767 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172c0f5c-eb3c-4e93-8a59-afbc7f769a1a/bin/uautomizer-IVEQpCNsaX/data/0f6c9fdf7/87c6c435785b480ba7883554c1c2ee30/FLAGd971b53c7 [2021-11-09 09:39:25,033 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172c0f5c-eb3c-4e93-8a59-afbc7f769a1a/bin/uautomizer-IVEQpCNsaX/data/0f6c9fdf7/87c6c435785b480ba7883554c1c2ee30 [2021-11-09 09:39:25,037 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:39:25,039 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 09:39:25,045 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:39:25,045 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:39:25,050 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:39:25,051 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:39:25" (1/1) ... [2021-11-09 09:39:25,052 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b9e476f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:39:25, skipping insertion in model container [2021-11-09 09:39:25,053 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:39:25" (1/1) ... [2021-11-09 09:39:25,061 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:39:25,281 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:39:25,631 WARN L228 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_172c0f5c-eb3c-4e93-8a59-afbc7f769a1a/sv-benchmarks/c/eca-rers2012/Problem13_label21.c[3130,3143] [2021-11-09 09:39:27,516 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:39:27,552 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:39:27,618 WARN L228 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_172c0f5c-eb3c-4e93-8a59-afbc7f769a1a/sv-benchmarks/c/eca-rers2012/Problem13_label21.c[3130,3143] [2021-11-09 09:39:28,609 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:39:28,652 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:39:28,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:39:28 WrapperNode [2021-11-09 09:39:28,654 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:39:28,655 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 09:39:28,656 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 09:39:28,656 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 09:39:28,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:39:28" (1/1) ... [2021-11-09 09:39:28,770 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:39:28" (1/1) ... [2021-11-09 09:39:29,703 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 09:39:29,704 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:39:29,704 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:39:29,705 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:39:29,718 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:39:28" (1/1) ... [2021-11-09 09:39:29,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:39:28" (1/1) ... [2021-11-09 09:39:29,970 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:39:28" (1/1) ... [2021-11-09 09:39:29,974 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:39:28" (1/1) ... [2021-11-09 09:39:30,599 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:39:28" (1/1) ... [2021-11-09 09:39:30,708 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:39:28" (1/1) ... [2021-11-09 09:39:30,853 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:39:28" (1/1) ... [2021-11-09 09:39:31,025 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:39:31,027 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:39:31,027 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:39:31,029 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:39:31,030 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:39:28" (1/1) ... [2021-11-09 09:39:31,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:39:31,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172c0f5c-eb3c-4e93-8a59-afbc7f769a1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:39:31,076 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172c0f5c-eb3c-4e93-8a59-afbc7f769a1a/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:39:31,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172c0f5c-eb3c-4e93-8a59-afbc7f769a1a/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:39:31,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 09:39:31,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:39:31,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:39:31,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:39:39,014 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:39:39,014 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-11-09 09:39:39,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:39:39 BoogieIcfgContainer [2021-11-09 09:39:39,020 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:39:39,024 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:39:39,024 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:39:39,030 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:39:39,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:39:25" (1/3) ... [2021-11-09 09:39:39,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c2f0b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:39:39, skipping insertion in model container [2021-11-09 09:39:39,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:39:28" (2/3) ... [2021-11-09 09:39:39,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c2f0b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:39:39, skipping insertion in model container [2021-11-09 09:39:39,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:39:39" (3/3) ... [2021-11-09 09:39:39,035 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label21.c [2021-11-09 09:39:39,046 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:39:39,047 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 09:39:39,138 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:39:39,149 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=PETRI_NET, 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 [2021-11-09 09:39:39,150 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 09:39:39,213 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:39:39,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-09 09:39:39,225 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:39:39,226 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:39:39,226 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:39:39,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:39:39,250 INFO L85 PathProgramCache]: Analyzing trace with hash -279853278, now seen corresponding path program 1 times [2021-11-09 09:39:39,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:39:39,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486500434] [2021-11-09 09:39:39,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:39:39,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:39:39,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:39,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:39:39,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:39:39,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486500434] [2021-11-09 09:39:39,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486500434] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:39:39,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:39:39,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 09:39:39,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728805436] [2021-11-09 09:39:39,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:39:39,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:39:39,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:39:39,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:39:39,664 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 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 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:39:46,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:39:46,901 INFO L93 Difference]: Finished difference Result 3121 states and 5804 transitions. [2021-11-09 09:39:46,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:39:46,904 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-09 09:39:46,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:39:46,948 INFO L225 Difference]: With dead ends: 3121 [2021-11-09 09:39:46,948 INFO L226 Difference]: Without dead ends: 1944 [2021-11-09 09:39:46,959 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:39:46,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-11-09 09:39:47,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1873. [2021-11-09 09:39:47,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1872 states have (on average 1.7393162393162394) internal successors, (3256), 1872 states have internal predecessors, (3256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:39:47,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 3256 transitions. [2021-11-09 09:39:47,157 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 3256 transitions. Word has length 20 [2021-11-09 09:39:47,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:39:47,158 INFO L470 AbstractCegarLoop]: Abstraction has 1873 states and 3256 transitions. [2021-11-09 09:39:47,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:39:47,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 3256 transitions. [2021-11-09 09:39:47,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-09 09:39:47,166 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:39:47,167 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:39:47,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 09:39:47,168 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:39:47,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:39:47,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1306602698, now seen corresponding path program 1 times [2021-11-09 09:39:47,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:39:47,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215365519] [2021-11-09 09:39:47,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:39:47,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:39:47,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:47,415 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:39:47,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:39:47,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215365519] [2021-11-09 09:39:47,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215365519] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:39:47,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:39:47,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 09:39:47,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482321310] [2021-11-09 09:39:47,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:39:47,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:39:47,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:39:47,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:39:47,425 INFO L87 Difference]: Start difference. First operand 1873 states and 3256 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:39:54,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:39:54,123 INFO L93 Difference]: Finished difference Result 5351 states and 9369 transitions. [2021-11-09 09:39:54,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:39:54,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-09 09:39:54,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:39:54,158 INFO L225 Difference]: With dead ends: 5351 [2021-11-09 09:39:54,159 INFO L226 Difference]: Without dead ends: 3480 [2021-11-09 09:39:54,165 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:39:54,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3480 states. [2021-11-09 09:39:54,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3480 to 3479. [2021-11-09 09:39:54,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3479 states, 3478 states have (on average 1.518688901667625) internal successors, (5282), 3478 states have internal predecessors, (5282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:39:54,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3479 states to 3479 states and 5282 transitions. [2021-11-09 09:39:54,282 INFO L78 Accepts]: Start accepts. Automaton has 3479 states and 5282 transitions. Word has length 85 [2021-11-09 09:39:54,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:39:54,283 INFO L470 AbstractCegarLoop]: Abstraction has 3479 states and 5282 transitions. [2021-11-09 09:39:54,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:39:54,284 INFO L276 IsEmpty]: Start isEmpty. Operand 3479 states and 5282 transitions. [2021-11-09 09:39:54,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-09 09:39:54,289 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:39:54,289 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:39:54,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 09:39:54,290 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:39:54,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:39:54,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1302816827, now seen corresponding path program 1 times [2021-11-09 09:39:54,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:39:54,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633498533] [2021-11-09 09:39:54,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:39:54,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:39:54,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:54,474 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:39:54,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:39:54,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633498533] [2021-11-09 09:39:54,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633498533] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:39:54,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:39:54,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 09:39:54,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740969416] [2021-11-09 09:39:54,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:39:54,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:39:54,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:39:54,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:39:54,479 INFO L87 Difference]: Start difference. First operand 3479 states and 5282 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:00,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:40:00,200 INFO L93 Difference]: Finished difference Result 10142 states and 15438 transitions. [2021-11-09 09:40:00,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:40:00,201 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-09 09:40:00,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:40:00,252 INFO L225 Difference]: With dead ends: 10142 [2021-11-09 09:40:00,252 INFO L226 Difference]: Without dead ends: 6665 [2021-11-09 09:40:00,259 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:40:00,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6665 states. [2021-11-09 09:40:00,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6665 to 6657. [2021-11-09 09:40:00,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6657 states, 6656 states have (on average 1.3728966346153846) internal successors, (9138), 6656 states have internal predecessors, (9138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:00,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6657 states to 6657 states and 9138 transitions. [2021-11-09 09:40:00,449 INFO L78 Accepts]: Start accepts. Automaton has 6657 states and 9138 transitions. Word has length 87 [2021-11-09 09:40:00,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:40:00,451 INFO L470 AbstractCegarLoop]: Abstraction has 6657 states and 9138 transitions. [2021-11-09 09:40:00,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:00,451 INFO L276 IsEmpty]: Start isEmpty. Operand 6657 states and 9138 transitions. [2021-11-09 09:40:00,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-09 09:40:00,454 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:40:00,454 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:00,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 09:40:00,455 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:40:00,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:00,456 INFO L85 PathProgramCache]: Analyzing trace with hash 2120781558, now seen corresponding path program 1 times [2021-11-09 09:40:00,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:00,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445540775] [2021-11-09 09:40:00,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:00,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:00,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:00,559 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:00,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:00,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445540775] [2021-11-09 09:40:00,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445540775] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:40:00,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:40:00,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 09:40:00,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042801874] [2021-11-09 09:40:00,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:40:00,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:00,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:40:00,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:40:00,564 INFO L87 Difference]: Start difference. First operand 6657 states and 9138 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:05,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:40:05,432 INFO L93 Difference]: Finished difference Result 19637 states and 26969 transitions. [2021-11-09 09:40:05,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:40:05,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-09 09:40:05,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:40:05,515 INFO L225 Difference]: With dead ends: 19637 [2021-11-09 09:40:05,515 INFO L226 Difference]: Without dead ends: 12982 [2021-11-09 09:40:05,528 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:40:05,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12982 states. [2021-11-09 09:40:05,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12982 to 12964. [2021-11-09 09:40:06,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12964 states, 12963 states have (on average 1.2390650312427678) internal successors, (16062), 12963 states have internal predecessors, (16062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:06,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12964 states to 12964 states and 16062 transitions. [2021-11-09 09:40:06,106 INFO L78 Accepts]: Start accepts. Automaton has 12964 states and 16062 transitions. Word has length 93 [2021-11-09 09:40:06,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:40:06,107 INFO L470 AbstractCegarLoop]: Abstraction has 12964 states and 16062 transitions. [2021-11-09 09:40:06,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:06,109 INFO L276 IsEmpty]: Start isEmpty. Operand 12964 states and 16062 transitions. [2021-11-09 09:40:06,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-09 09:40:06,116 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:40:06,116 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:06,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 09:40:06,117 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:40:06,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:06,122 INFO L85 PathProgramCache]: Analyzing trace with hash -841642226, now seen corresponding path program 1 times [2021-11-09 09:40:06,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:06,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672562068] [2021-11-09 09:40:06,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:06,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:06,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:06,325 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-09 09:40:06,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:06,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672562068] [2021-11-09 09:40:06,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672562068] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:40:06,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:40:06,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 09:40:06,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263188894] [2021-11-09 09:40:06,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:40:06,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:06,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:40:06,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:40:06,329 INFO L87 Difference]: Start difference. First operand 12964 states and 16062 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:11,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:40:11,715 INFO L93 Difference]: Finished difference Result 37781 states and 46952 transitions. [2021-11-09 09:40:11,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:40:11,716 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-11-09 09:40:11,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:40:11,798 INFO L225 Difference]: With dead ends: 37781 [2021-11-09 09:40:11,798 INFO L226 Difference]: Without dead ends: 24819 [2021-11-09 09:40:11,819 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:40:11,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24819 states. [2021-11-09 09:40:12,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24819 to 24812. [2021-11-09 09:40:12,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24812 states, 24811 states have (on average 1.211962436016283) internal successors, (30070), 24811 states have internal predecessors, (30070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:12,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24812 states to 24812 states and 30070 transitions. [2021-11-09 09:40:12,474 INFO L78 Accepts]: Start accepts. Automaton has 24812 states and 30070 transitions. Word has length 109 [2021-11-09 09:40:12,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:40:12,476 INFO L470 AbstractCegarLoop]: Abstraction has 24812 states and 30070 transitions. [2021-11-09 09:40:12,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:12,477 INFO L276 IsEmpty]: Start isEmpty. Operand 24812 states and 30070 transitions. [2021-11-09 09:40:12,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-09 09:40:12,479 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:40:12,480 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:12,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 09:40:12,481 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:40:12,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:12,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1104252474, now seen corresponding path program 1 times [2021-11-09 09:40:12,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:12,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613320185] [2021-11-09 09:40:12,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:12,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:12,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:12,644 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:12,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:12,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613320185] [2021-11-09 09:40:12,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613320185] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:40:12,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:40:12,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 09:40:12,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198167815] [2021-11-09 09:40:12,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:40:12,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:12,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:40:12,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:40:12,649 INFO L87 Difference]: Start difference. First operand 24812 states and 30070 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:17,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:40:17,508 INFO L93 Difference]: Finished difference Result 44112 states and 54199 transitions. [2021-11-09 09:40:17,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:40:17,519 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-11-09 09:40:17,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:40:17,588 INFO L225 Difference]: With dead ends: 44112 [2021-11-09 09:40:17,588 INFO L226 Difference]: Without dead ends: 24821 [2021-11-09 09:40:17,609 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:40:17,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24821 states. [2021-11-09 09:40:18,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24821 to 24812. [2021-11-09 09:40:18,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24812 states, 24811 states have (on average 1.2105517713917213) internal successors, (30035), 24811 states have internal predecessors, (30035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:18,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24812 states to 24812 states and 30035 transitions. [2021-11-09 09:40:18,102 INFO L78 Accepts]: Start accepts. Automaton has 24812 states and 30035 transitions. Word has length 136 [2021-11-09 09:40:18,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:40:18,103 INFO L470 AbstractCegarLoop]: Abstraction has 24812 states and 30035 transitions. [2021-11-09 09:40:18,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:18,104 INFO L276 IsEmpty]: Start isEmpty. Operand 24812 states and 30035 transitions. [2021-11-09 09:40:18,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-11-09 09:40:18,111 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:40:18,112 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:18,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 09:40:18,113 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:40:18,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:18,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1440296515, now seen corresponding path program 1 times [2021-11-09 09:40:18,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:18,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012768869] [2021-11-09 09:40:18,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:18,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:18,350 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:18,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:18,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012768869] [2021-11-09 09:40:18,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012768869] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:40:18,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:40:18,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:40:18,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383273350] [2021-11-09 09:40:18,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:40:18,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:18,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:40:18,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:40:18,357 INFO L87 Difference]: Start difference. First operand 24812 states and 30035 transitions. Second operand has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:24,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:40:24,138 INFO L93 Difference]: Finished difference Result 70074 states and 85509 transitions. [2021-11-09 09:40:24,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:40:24,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 234 [2021-11-09 09:40:24,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:40:24,212 INFO L225 Difference]: With dead ends: 70074 [2021-11-09 09:40:24,213 INFO L226 Difference]: Without dead ends: 45264 [2021-11-09 09:40:24,238 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:40:24,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45264 states. [2021-11-09 09:40:25,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45264 to 42893. [2021-11-09 09:40:25,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42893 states, 42892 states have (on average 1.1765830457894246) internal successors, (50466), 42892 states have internal predecessors, (50466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:25,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42893 states to 42893 states and 50466 transitions. [2021-11-09 09:40:25,217 INFO L78 Accepts]: Start accepts. Automaton has 42893 states and 50466 transitions. Word has length 234 [2021-11-09 09:40:25,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:40:25,218 INFO L470 AbstractCegarLoop]: Abstraction has 42893 states and 50466 transitions. [2021-11-09 09:40:25,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:25,219 INFO L276 IsEmpty]: Start isEmpty. Operand 42893 states and 50466 transitions. [2021-11-09 09:40:25,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-11-09 09:40:25,225 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:40:25,225 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:25,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 09:40:25,226 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:40:25,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:25,227 INFO L85 PathProgramCache]: Analyzing trace with hash 626390365, now seen corresponding path program 1 times [2021-11-09 09:40:25,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:25,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439985443] [2021-11-09 09:40:25,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:25,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:25,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:25,393 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-09 09:40:25,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:25,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439985443] [2021-11-09 09:40:25,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439985443] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:40:25,394 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:40:25,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 09:40:25,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241017609] [2021-11-09 09:40:25,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:40:25,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:25,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:40:25,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:40:25,397 INFO L87 Difference]: Start difference. First operand 42893 states and 50466 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:30,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:40:30,729 INFO L93 Difference]: Finished difference Result 84997 states and 100133 transitions. [2021-11-09 09:40:30,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:40:30,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 249 [2021-11-09 09:40:30,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:40:30,798 INFO L225 Difference]: With dead ends: 84997 [2021-11-09 09:40:30,798 INFO L226 Difference]: Without dead ends: 42893 [2021-11-09 09:40:30,843 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:40:30,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42893 states. [2021-11-09 09:40:31,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42893 to 42893. [2021-11-09 09:40:31,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42893 states, 42892 states have (on average 1.1764664739345332) internal successors, (50461), 42892 states have internal predecessors, (50461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:31,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42893 states to 42893 states and 50461 transitions. [2021-11-09 09:40:31,815 INFO L78 Accepts]: Start accepts. Automaton has 42893 states and 50461 transitions. Word has length 249 [2021-11-09 09:40:31,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:40:31,816 INFO L470 AbstractCegarLoop]: Abstraction has 42893 states and 50461 transitions. [2021-11-09 09:40:31,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:31,816 INFO L276 IsEmpty]: Start isEmpty. Operand 42893 states and 50461 transitions. [2021-11-09 09:40:31,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-11-09 09:40:31,822 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:40:31,823 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:31,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 09:40:31,824 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:40:31,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:31,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1004312114, now seen corresponding path program 1 times [2021-11-09 09:40:31,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:31,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896842346] [2021-11-09 09:40:31,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:31,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:31,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:31,985 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 240 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-09 09:40:31,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:31,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896842346] [2021-11-09 09:40:31,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896842346] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:40:31,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:40:31,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:40:31,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311996016] [2021-11-09 09:40:31,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:40:31,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:31,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:40:31,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:40:31,996 INFO L87 Difference]: Start difference. First operand 42893 states and 50461 transitions. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:37,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:40:37,543 INFO L93 Difference]: Finished difference Result 104682 states and 125381 transitions. [2021-11-09 09:40:37,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:40:37,549 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 256 [2021-11-09 09:40:37,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:40:37,640 INFO L225 Difference]: With dead ends: 104682 [2021-11-09 09:40:37,640 INFO L226 Difference]: Without dead ends: 62578 [2021-11-09 09:40:37,666 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:40:37,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62578 states. [2021-11-09 09:40:38,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62578 to 60994. [2021-11-09 09:40:38,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60994 states, 60993 states have (on average 1.1660518420146575) internal successors, (71121), 60993 states have internal predecessors, (71121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:38,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60994 states to 60994 states and 71121 transitions. [2021-11-09 09:40:38,796 INFO L78 Accepts]: Start accepts. Automaton has 60994 states and 71121 transitions. Word has length 256 [2021-11-09 09:40:38,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:40:38,797 INFO L470 AbstractCegarLoop]: Abstraction has 60994 states and 71121 transitions. [2021-11-09 09:40:38,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:38,798 INFO L276 IsEmpty]: Start isEmpty. Operand 60994 states and 71121 transitions. [2021-11-09 09:40:38,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-11-09 09:40:38,803 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:40:38,804 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:38,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-09 09:40:38,805 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:40:38,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:38,806 INFO L85 PathProgramCache]: Analyzing trace with hash -81397391, now seen corresponding path program 1 times [2021-11-09 09:40:38,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:38,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540909708] [2021-11-09 09:40:38,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:38,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:39,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:39,551 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 38 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:39,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:39,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540909708] [2021-11-09 09:40:39,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540909708] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:40:39,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180248231] [2021-11-09 09:40:39,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:39,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:40:39,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172c0f5c-eb3c-4e93-8a59-afbc7f769a1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:40:39,559 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172c0f5c-eb3c-4e93-8a59-afbc7f769a1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:40:39,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172c0f5c-eb3c-4e93-8a59-afbc7f769a1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 09:40:39,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:39,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 09:40:39,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:40:40,717 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-09 09:40:40,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180248231] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:40:40,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:40:40,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-11-09 09:40:40,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282014445] [2021-11-09 09:40:40,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:40:40,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:40,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:40:40,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:40:40,729 INFO L87 Difference]: Start difference. First operand 60994 states and 71121 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:46,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:40:46,222 INFO L93 Difference]: Finished difference Result 121197 states and 141447 transitions. [2021-11-09 09:40:46,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:40:46,223 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 261 [2021-11-09 09:40:46,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:40:46,313 INFO L225 Difference]: With dead ends: 121197 [2021-11-09 09:40:46,313 INFO L226 Difference]: Without dead ends: 60992 [2021-11-09 09:40:46,339 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:40:46,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60992 states. [2021-11-09 09:40:47,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60992 to 60991. [2021-11-09 09:40:47,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60991 states, 60990 states have (on average 1.128529267092966) internal successors, (68829), 60990 states have internal predecessors, (68829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:47,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60991 states to 60991 states and 68829 transitions. [2021-11-09 09:40:47,670 INFO L78 Accepts]: Start accepts. Automaton has 60991 states and 68829 transitions. Word has length 261 [2021-11-09 09:40:47,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:40:47,671 INFO L470 AbstractCegarLoop]: Abstraction has 60991 states and 68829 transitions. [2021-11-09 09:40:47,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:47,672 INFO L276 IsEmpty]: Start isEmpty. Operand 60991 states and 68829 transitions. [2021-11-09 09:40:47,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2021-11-09 09:40:47,681 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:40:47,682 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:47,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172c0f5c-eb3c-4e93-8a59-afbc7f769a1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-09 09:40:47,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172c0f5c-eb3c-4e93-8a59-afbc7f769a1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 09:40:47,905 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:40:47,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:47,906 INFO L85 PathProgramCache]: Analyzing trace with hash -256343890, now seen corresponding path program 1 times [2021-11-09 09:40:47,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:47,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270812468] [2021-11-09 09:40:47,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:47,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:48,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:48,134 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-09 09:40:48,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:48,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270812468] [2021-11-09 09:40:48,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270812468] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:40:48,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:40:48,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:40:48,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148249932] [2021-11-09 09:40:48,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:40:48,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:48,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:40:48,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:40:48,139 INFO L87 Difference]: Start difference. First operand 60991 states and 68829 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:54,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:40:54,162 INFO L93 Difference]: Finished difference Result 140089 states and 159778 transitions. [2021-11-09 09:40:54,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:40:54,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 311 [2021-11-09 09:40:54,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:40:54,268 INFO L225 Difference]: With dead ends: 140089 [2021-11-09 09:40:54,268 INFO L226 Difference]: Without dead ends: 79887 [2021-11-09 09:40:54,294 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:40:54,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79887 states. [2021-11-09 09:40:55,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79887 to 79096. [2021-11-09 09:40:55,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79096 states, 79095 states have (on average 1.1100069536633164) internal successors, (87796), 79095 states have internal predecessors, (87796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:55,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79096 states to 79096 states and 87796 transitions. [2021-11-09 09:40:55,941 INFO L78 Accepts]: Start accepts. Automaton has 79096 states and 87796 transitions. Word has length 311 [2021-11-09 09:40:55,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:40:55,942 INFO L470 AbstractCegarLoop]: Abstraction has 79096 states and 87796 transitions. [2021-11-09 09:40:55,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:55,943 INFO L276 IsEmpty]: Start isEmpty. Operand 79096 states and 87796 transitions. [2021-11-09 09:40:55,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-11-09 09:40:55,952 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:40:55,953 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:55,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-09 09:40:55,954 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:40:55,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:55,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1775123547, now seen corresponding path program 1 times [2021-11-09 09:40:55,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:55,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765721921] [2021-11-09 09:40:55,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:55,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:56,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:56,372 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 167 proven. 110 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-09 09:40:56,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:56,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765721921] [2021-11-09 09:40:56,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765721921] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:40:56,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001608325] [2021-11-09 09:40:56,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:56,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:40:56,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172c0f5c-eb3c-4e93-8a59-afbc7f769a1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:40:56,375 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172c0f5c-eb3c-4e93-8a59-afbc7f769a1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:40:56,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172c0f5c-eb3c-4e93-8a59-afbc7f769a1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 09:40:56,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:56,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 09:40:56,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:40:57,595 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-09 09:40:57,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001608325] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:40:57,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:40:57,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-11-09 09:40:57,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000360083] [2021-11-09 09:40:57,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:40:57,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:57,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:40:57,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:40:57,598 INFO L87 Difference]: Start difference. First operand 79096 states and 87796 transitions. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:41:02,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:41:02,713 INFO L93 Difference]: Finished difference Result 157394 states and 174790 transitions. [2021-11-09 09:41:02,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:41:02,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 326 [2021-11-09 09:41:02,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:41:02,822 INFO L225 Difference]: With dead ends: 157394 [2021-11-09 09:41:02,822 INFO L226 Difference]: Without dead ends: 79087 [2021-11-09 09:41:02,858 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:41:02,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79087 states. [2021-11-09 09:41:04,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79087 to 79086. [2021-11-09 09:41:04,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79086 states, 79085 states have (on average 1.0809002971486374) internal successors, (85483), 79085 states have internal predecessors, (85483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:41:04,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79086 states to 79086 states and 85483 transitions. [2021-11-09 09:41:04,367 INFO L78 Accepts]: Start accepts. Automaton has 79086 states and 85483 transitions. Word has length 326 [2021-11-09 09:41:04,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:41:04,368 INFO L470 AbstractCegarLoop]: Abstraction has 79086 states and 85483 transitions. [2021-11-09 09:41:04,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:41:04,369 INFO L276 IsEmpty]: Start isEmpty. Operand 79086 states and 85483 transitions. [2021-11-09 09:41:04,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2021-11-09 09:41:04,380 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:41:04,381 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:41:04,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172c0f5c-eb3c-4e93-8a59-afbc7f769a1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 09:41:04,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172c0f5c-eb3c-4e93-8a59-afbc7f769a1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-09 09:41:04,594 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:41:04,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:41:04,595 INFO L85 PathProgramCache]: Analyzing trace with hash -22099335, now seen corresponding path program 1 times [2021-11-09 09:41:04,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:41:04,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198343909] [2021-11-09 09:41:04,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:04,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:41:04,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:04,840 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 426 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-09 09:41:04,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:41:04,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198343909] [2021-11-09 09:41:04,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198343909] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:41:04,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:41:04,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:41:04,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263064245] [2021-11-09 09:41:04,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:41:04,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:41:04,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:41:04,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:41:04,846 INFO L87 Difference]: Start difference. First operand 79086 states and 85483 transitions. Second operand has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:41:16,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:41:16,076 INFO L93 Difference]: Finished difference Result 221341 states and 239937 transitions. [2021-11-09 09:41:16,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:41:16,077 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 368 [2021-11-09 09:41:16,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:41:16,278 INFO L225 Difference]: With dead ends: 221341 [2021-11-09 09:41:16,278 INFO L226 Difference]: Without dead ends: 143044 [2021-11-09 09:41:16,322 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:41:16,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143044 states. [2021-11-09 09:41:18,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143044 to 139766. [2021-11-09 09:41:18,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139766 states, 139765 states have (on average 1.0780524451758309) internal successors, (150674), 139765 states have internal predecessors, (150674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:41:18,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139766 states to 139766 states and 150674 transitions. [2021-11-09 09:41:18,604 INFO L78 Accepts]: Start accepts. Automaton has 139766 states and 150674 transitions. Word has length 368 [2021-11-09 09:41:18,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:41:18,604 INFO L470 AbstractCegarLoop]: Abstraction has 139766 states and 150674 transitions. [2021-11-09 09:41:18,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:41:18,605 INFO L276 IsEmpty]: Start isEmpty. Operand 139766 states and 150674 transitions. [2021-11-09 09:41:18,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2021-11-09 09:41:18,613 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:41:18,614 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:41:18,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-09 09:41:18,615 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:41:18,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:41:18,616 INFO L85 PathProgramCache]: Analyzing trace with hash -208077102, now seen corresponding path program 1 times [2021-11-09 09:41:18,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:41:18,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604098464] [2021-11-09 09:41:18,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:18,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:41:18,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:19,041 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 251 proven. 110 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-09 09:41:19,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:41:19,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604098464] [2021-11-09 09:41:19,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604098464] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:19,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718714368] [2021-11-09 09:41:19,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:19,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:41:19,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172c0f5c-eb3c-4e93-8a59-afbc7f769a1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:41:19,045 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172c0f5c-eb3c-4e93-8a59-afbc7f769a1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:41:19,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172c0f5c-eb3c-4e93-8a59-afbc7f769a1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 09:41:19,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:19,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 09:41:19,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:41:21,228 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 266 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-09 09:41:21,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718714368] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:41:21,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:41:21,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-11-09 09:41:21,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155855967] [2021-11-09 09:41:21,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:41:21,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:41:21,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:41:21,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:41:21,231 INFO L87 Difference]: Start difference. First operand 139766 states and 150674 transitions. Second operand has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:41:27,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:41:27,010 INFO L93 Difference]: Finished difference Result 276366 states and 299725 transitions. [2021-11-09 09:41:27,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:41:27,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 368 [2021-11-09 09:41:27,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:41:27,209 INFO L225 Difference]: With dead ends: 276366 [2021-11-09 09:41:27,209 INFO L226 Difference]: Without dead ends: 151565 [2021-11-09 09:41:27,249 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:41:27,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151565 states. [2021-11-09 09:41:29,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151565 to 151565. [2021-11-09 09:41:29,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151565 states, 151564 states have (on average 1.0783431421709642) internal successors, (163438), 151564 states have internal predecessors, (163438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:41:29,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151565 states to 151565 states and 163438 transitions. [2021-11-09 09:41:29,856 INFO L78 Accepts]: Start accepts. Automaton has 151565 states and 163438 transitions. Word has length 368 [2021-11-09 09:41:29,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:41:29,858 INFO L470 AbstractCegarLoop]: Abstraction has 151565 states and 163438 transitions. [2021-11-09 09:41:29,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:41:29,858 INFO L276 IsEmpty]: Start isEmpty. Operand 151565 states and 163438 transitions. [2021-11-09 09:41:29,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2021-11-09 09:41:29,873 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:41:29,873 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:41:29,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172c0f5c-eb3c-4e93-8a59-afbc7f769a1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 09:41:30,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172c0f5c-eb3c-4e93-8a59-afbc7f769a1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-09 09:41:30,090 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:41:30,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:41:30,091 INFO L85 PathProgramCache]: Analyzing trace with hash -426963613, now seen corresponding path program 1 times [2021-11-09 09:41:30,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:41:30,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306361194] [2021-11-09 09:41:30,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:30,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:41:30,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:31,318 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 336 proven. 110 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-09 09:41:31,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:41:31,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306361194] [2021-11-09 09:41:31,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306361194] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:31,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277911008] [2021-11-09 09:41:31,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:31,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:41:31,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172c0f5c-eb3c-4e93-8a59-afbc7f769a1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:41:31,329 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172c0f5c-eb3c-4e93-8a59-afbc7f769a1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:41:31,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172c0f5c-eb3c-4e93-8a59-afbc7f769a1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 09:41:32,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:32,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 09:41:32,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:41:33,267 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2021-11-09 09:41:33,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277911008] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:41:33,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:41:33,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-11-09 09:41:33,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96412781] [2021-11-09 09:41:33,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:41:33,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:41:33,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:41:33,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:41:33,271 INFO L87 Difference]: Start difference. First operand 151565 states and 163438 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:41:39,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:41:39,101 INFO L93 Difference]: Finished difference Result 303915 states and 327668 transitions. [2021-11-09 09:41:39,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:41:39,102 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 411 [2021-11-09 09:41:39,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:41:39,380 INFO L225 Difference]: With dead ends: 303915 [2021-11-09 09:41:39,380 INFO L226 Difference]: Without dead ends: 153139 [2021-11-09 09:41:39,444 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 410 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:41:39,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153139 states. [2021-11-09 09:41:41,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153139 to 151550. [2021-11-09 09:41:41,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151550 states, 151549 states have (on average 1.0654507782961287) internal successors, (161468), 151549 states have internal predecessors, (161468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:41:42,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151550 states to 151550 states and 161468 transitions. [2021-11-09 09:41:42,201 INFO L78 Accepts]: Start accepts. Automaton has 151550 states and 161468 transitions. Word has length 411 [2021-11-09 09:41:42,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:41:42,203 INFO L470 AbstractCegarLoop]: Abstraction has 151550 states and 161468 transitions. [2021-11-09 09:41:42,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:41:42,203 INFO L276 IsEmpty]: Start isEmpty. Operand 151550 states and 161468 transitions. [2021-11-09 09:41:42,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-11-09 09:41:42,214 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:41:42,214 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:41:42,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172c0f5c-eb3c-4e93-8a59-afbc7f769a1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 09:41:42,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172c0f5c-eb3c-4e93-8a59-afbc7f769a1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:41:42,415 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:41:42,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:41:42,416 INFO L85 PathProgramCache]: Analyzing trace with hash 700384854, now seen corresponding path program 1 times [2021-11-09 09:41:42,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:41:42,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155071736] [2021-11-09 09:41:42,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:42,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:41:42,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:42,845 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 372 proven. 110 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-11-09 09:41:42,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:41:42,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155071736] [2021-11-09 09:41:42,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155071736] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:42,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705272669] [2021-11-09 09:41:42,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:42,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:41:42,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172c0f5c-eb3c-4e93-8a59-afbc7f769a1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:41:42,848 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172c0f5c-eb3c-4e93-8a59-afbc7f769a1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:41:42,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172c0f5c-eb3c-4e93-8a59-afbc7f769a1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 09:41:43,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:43,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 09:41:43,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:41:45,603 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 319 proven. 0 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2021-11-09 09:41:45,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705272669] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:41:45,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:41:45,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-11-09 09:41:45,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710662333] [2021-11-09 09:41:45,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:41:45,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:41:45,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:41:45,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:41:45,622 INFO L87 Difference]: Start difference. First operand 151550 states and 161468 transitions. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:41:51,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:41:51,756 INFO L93 Difference]: Finished difference Result 333799 states and 356596 transitions. [2021-11-09 09:41:51,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:41:51,757 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 429 [2021-11-09 09:41:51,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:41:52,051 INFO L225 Difference]: With dead ends: 333799 [2021-11-09 09:41:52,051 INFO L226 Difference]: Without dead ends: 183038 [2021-11-09 09:41:52,123 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 428 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:41:52,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183038 states. [2021-11-09 09:41:54,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183038 to 180667. [2021-11-09 09:41:55,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180667 states, 180666 states have (on average 1.0652142627832575) internal successors, (192448), 180666 states have internal predecessors, (192448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:41:55,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180667 states to 180667 states and 192448 transitions. [2021-11-09 09:41:55,443 INFO L78 Accepts]: Start accepts. Automaton has 180667 states and 192448 transitions. Word has length 429 [2021-11-09 09:41:55,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:41:55,444 INFO L470 AbstractCegarLoop]: Abstraction has 180667 states and 192448 transitions. [2021-11-09 09:41:55,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:41:55,445 INFO L276 IsEmpty]: Start isEmpty. Operand 180667 states and 192448 transitions. [2021-11-09 09:41:55,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2021-11-09 09:41:55,457 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:41:55,457 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:41:55,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172c0f5c-eb3c-4e93-8a59-afbc7f769a1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 09:41:55,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172c0f5c-eb3c-4e93-8a59-afbc7f769a1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-09 09:41:55,658 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:41:55,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:41:55,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1720056613, now seen corresponding path program 1 times [2021-11-09 09:41:55,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:41:55,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053641834] [2021-11-09 09:41:55,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:55,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:41:55,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:55,930 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 569 trivial. 0 not checked. [2021-11-09 09:41:55,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:41:55,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053641834] [2021-11-09 09:41:55,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053641834] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:41:55,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:41:55,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:41:55,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795248739] [2021-11-09 09:41:55,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:41:55,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:41:55,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:41:55,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:41:55,938 INFO L87 Difference]: Start difference. First operand 180667 states and 192448 transitions. Second operand has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)