./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem12_label55.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e22f9e-10b4-4ab3-b516-290cdb48b450/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e22f9e-10b4-4ab3-b516-290cdb48b450/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e22f9e-10b4-4ab3-b516-290cdb48b450/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e22f9e-10b4-4ab3-b516-290cdb48b450/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem12_label55.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e22f9e-10b4-4ab3-b516-290cdb48b450/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e22f9e-10b4-4ab3-b516-290cdb48b450/bin/uautomizer-ug76WZFUDN --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 fba727d7a76ab6b9efdfaecb09ee87c47b40a8cbdd36892d05e32f34590b7c75 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 10:46:53,659 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:46:53,661 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:46:53,711 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:46:53,712 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:46:53,713 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:46:53,714 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:46:53,716 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:46:53,718 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:46:53,719 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:46:53,720 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:46:53,721 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:46:53,722 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:46:53,723 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:46:53,724 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:46:53,726 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:46:53,727 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:46:53,728 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:46:53,731 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:46:53,733 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:46:53,751 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:46:53,753 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:46:53,754 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:46:53,755 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:46:53,758 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:46:53,761 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:46:53,761 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:46:53,762 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:46:53,763 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:46:53,764 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:46:53,764 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:46:53,765 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:46:53,766 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:46:53,767 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:46:53,768 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:46:53,768 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:46:53,769 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:46:53,769 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:46:53,770 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:46:53,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:46:53,771 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:46:53,772 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e22f9e-10b4-4ab3-b516-290cdb48b450/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 10:46:53,793 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:46:53,793 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:46:53,793 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:46:53,794 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:46:53,794 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:46:53,795 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:46:53,795 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:46:53,795 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:46:53,796 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:46:53,796 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:46:53,796 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:46:53,796 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:46:53,796 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:46:53,797 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:46:53,797 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 10:46:53,797 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:46:53,797 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 10:46:53,797 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:46:53,798 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 10:46:53,798 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:46:53,798 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 10:46:53,798 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:46:53,798 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:46:53,799 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:46:53,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:46:53,799 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:46:53,799 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:46:53,799 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 10:46:53,800 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:46:53,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:46:53,800 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 10:46:53,800 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 10:46:53,800 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 10:46:53,801 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_d4e22f9e-10b4-4ab3-b516-290cdb48b450/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e22f9e-10b4-4ab3-b516-290cdb48b450/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fba727d7a76ab6b9efdfaecb09ee87c47b40a8cbdd36892d05e32f34590b7c75 [2022-11-20 10:46:54,124 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:46:54,151 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:46:54,153 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:46:54,155 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:46:54,155 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:46:54,156 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e22f9e-10b4-4ab3-b516-290cdb48b450/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/eca-rers2012/Problem12_label55.c [2022-11-20 10:46:57,135 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:46:57,643 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:46:57,644 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e22f9e-10b4-4ab3-b516-290cdb48b450/sv-benchmarks/c/eca-rers2012/Problem12_label55.c [2022-11-20 10:46:57,673 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e22f9e-10b4-4ab3-b516-290cdb48b450/bin/uautomizer-ug76WZFUDN/data/a648d1eb8/5f75106f30f64c1eaff519574e8592ec/FLAG5f54e4025 [2022-11-20 10:46:57,692 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e22f9e-10b4-4ab3-b516-290cdb48b450/bin/uautomizer-ug76WZFUDN/data/a648d1eb8/5f75106f30f64c1eaff519574e8592ec [2022-11-20 10:46:57,696 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:46:57,700 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:46:57,702 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:46:57,703 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:46:57,706 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:46:57,707 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:46:57" (1/1) ... [2022-11-20 10:46:57,708 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@584c4dcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:57, skipping insertion in model container [2022-11-20 10:46:57,709 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:46:57" (1/1) ... [2022-11-20 10:46:57,717 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:46:57,855 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:46:58,068 WARN L237 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_d4e22f9e-10b4-4ab3-b516-290cdb48b450/sv-benchmarks/c/eca-rers2012/Problem12_label55.c[1435,1448] [2022-11-20 10:46:59,173 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:46:59,185 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:46:59,247 WARN L237 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_d4e22f9e-10b4-4ab3-b516-290cdb48b450/sv-benchmarks/c/eca-rers2012/Problem12_label55.c[1435,1448] [2022-11-20 10:46:59,865 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:46:59,890 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:46:59,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:59 WrapperNode [2022-11-20 10:46:59,891 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:46:59,893 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:46:59,893 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:46:59,893 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:46:59,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:59" (1/1) ... [2022-11-20 10:46:59,982 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:59" (1/1) ... [2022-11-20 10:47:00,227 INFO L138 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2022-11-20 10:47:00,227 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:47:00,228 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:47:00,228 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:47:00,228 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:47:00,238 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:59" (1/1) ... [2022-11-20 10:47:00,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:59" (1/1) ... [2022-11-20 10:47:00,361 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:59" (1/1) ... [2022-11-20 10:47:00,361 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:59" (1/1) ... [2022-11-20 10:47:00,521 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:59" (1/1) ... [2022-11-20 10:47:00,550 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:59" (1/1) ... [2022-11-20 10:47:00,590 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:59" (1/1) ... [2022-11-20 10:47:00,607 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:59" (1/1) ... [2022-11-20 10:47:00,746 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:47:00,748 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:47:00,748 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:47:00,749 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:47:00,750 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:59" (1/1) ... [2022-11-20 10:47:00,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:47:00,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e22f9e-10b4-4ab3-b516-290cdb48b450/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:47:00,784 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e22f9e-10b4-4ab3-b516-290cdb48b450/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:47:00,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e22f9e-10b4-4ab3-b516-290cdb48b450/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:47:00,822 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:47:00,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:47:00,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:47:00,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:47:00,914 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:47:00,915 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:47:06,009 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:47:06,037 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:47:06,037 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 10:47:06,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:47:06 BoogieIcfgContainer [2022-11-20 10:47:06,041 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:47:06,043 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:47:06,043 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:47:06,050 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:47:06,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:46:57" (1/3) ... [2022-11-20 10:47:06,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ec223fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:47:06, skipping insertion in model container [2022-11-20 10:47:06,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:59" (2/3) ... [2022-11-20 10:47:06,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ec223fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:47:06, skipping insertion in model container [2022-11-20 10:47:06,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:47:06" (3/3) ... [2022-11-20 10:47:06,055 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label55.c [2022-11-20 10:47:06,075 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:47:06,076 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 10:47:06,170 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:47:06,179 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@102bd1a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:47:06,179 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 10:47:06,191 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:06,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 10:47:06,199 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:47:06,199 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:47:06,200 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:47:06,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:47:06,205 INFO L85 PathProgramCache]: Analyzing trace with hash 297966002, now seen corresponding path program 1 times [2022-11-20 10:47:06,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:47:06,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405830120] [2022-11-20 10:47:06,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:47:06,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:47:06,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:47:06,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:47:06,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:47:06,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405830120] [2022-11-20 10:47:06,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405830120] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:47:06,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:47:06,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:47:06,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7603221] [2022-11-20 10:47:06,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:47:06,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:47:06,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:47:06,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:47:06,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:47:06,458 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 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 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:11,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:47:11,746 INFO L93 Difference]: Finished difference Result 2388 states and 4629 transitions. [2022-11-20 10:47:11,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:47:11,749 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 10:47:11,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:47:11,780 INFO L225 Difference]: With dead ends: 2388 [2022-11-20 10:47:11,783 INFO L226 Difference]: Without dead ends: 1506 [2022-11-20 10:47:11,794 INFO L412 NwaCegarLoop]: 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 [2022-11-20 10:47:11,801 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 851 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2337 mSolverCounterSat, 1058 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 3395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1058 IncrementalHoareTripleChecker+Valid, 2337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:47:11,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [851 Valid, 102 Invalid, 3395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1058 Valid, 2337 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-11-20 10:47:11,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2022-11-20 10:47:11,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2022-11-20 10:47:11,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.869767441860465) internal successors, (2814), 1505 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:11,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2814 transitions. [2022-11-20 10:47:11,907 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2814 transitions. Word has length 8 [2022-11-20 10:47:11,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:47:11,908 INFO L495 AbstractCegarLoop]: Abstraction has 1506 states and 2814 transitions. [2022-11-20 10:47:11,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:11,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2814 transitions. [2022-11-20 10:47:11,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-20 10:47:11,924 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:47:11,924 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 10:47:11,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 10:47:11,925 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:47:11,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:47:11,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1906625532, now seen corresponding path program 1 times [2022-11-20 10:47:11,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:47:11,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605669235] [2022-11-20 10:47:11,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:47:11,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:47:12,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:47:12,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:47:12,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:47:12,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605669235] [2022-11-20 10:47:12,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605669235] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:47:12,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:47:12,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:47:12,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842219137] [2022-11-20 10:47:12,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:47:12,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:47:12,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:47:12,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:47:12,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:47:12,283 INFO L87 Difference]: Start difference. First operand 1506 states and 2814 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:16,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:47:16,810 INFO L93 Difference]: Finished difference Result 4514 states and 8438 transitions. [2022-11-20 10:47:16,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:47:16,811 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-11-20 10:47:16,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:47:16,825 INFO L225 Difference]: With dead ends: 4514 [2022-11-20 10:47:16,825 INFO L226 Difference]: Without dead ends: 3010 [2022-11-20 10:47:16,832 INFO L412 NwaCegarLoop]: 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 [2022-11-20 10:47:16,835 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 918 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2309 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 2859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 2309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:47:16,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [918 Valid, 354 Invalid, 2859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 2309 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-20 10:47:16,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3010 states. [2022-11-20 10:47:16,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3010 to 3008. [2022-11-20 10:47:16,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 1.6531426671100764) internal successors, (4971), 3007 states have internal predecessors, (4971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:16,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 4971 transitions. [2022-11-20 10:47:16,941 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 4971 transitions. Word has length 81 [2022-11-20 10:47:16,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:47:16,944 INFO L495 AbstractCegarLoop]: Abstraction has 3008 states and 4971 transitions. [2022-11-20 10:47:16,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:16,945 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 4971 transitions. [2022-11-20 10:47:16,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-20 10:47:16,952 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:47:16,953 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 10:47:16,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 10:47:16,957 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:47:16,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:47:16,963 INFO L85 PathProgramCache]: Analyzing trace with hash -129197833, now seen corresponding path program 1 times [2022-11-20 10:47:16,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:47:16,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483084821] [2022-11-20 10:47:16,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:47:16,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:47:17,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:47:17,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:47:17,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:47:17,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483084821] [2022-11-20 10:47:17,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483084821] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:47:17,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:47:17,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:47:17,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893701667] [2022-11-20 10:47:17,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:47:17,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:47:17,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:47:17,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:47:17,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:47:17,342 INFO L87 Difference]: Start difference. First operand 3008 states and 4971 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:24,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:47:24,301 INFO L93 Difference]: Finished difference Result 8267 states and 13429 transitions. [2022-11-20 10:47:24,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:47:24,301 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-11-20 10:47:24,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:47:24,319 INFO L225 Difference]: With dead ends: 8267 [2022-11-20 10:47:24,320 INFO L226 Difference]: Without dead ends: 5261 [2022-11-20 10:47:24,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:47:24,324 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 2154 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 4998 mSolverCounterSat, 851 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2154 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 5849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 851 IncrementalHoareTripleChecker+Valid, 4998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:47:24,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2154 Valid, 353 Invalid, 5849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [851 Valid, 4998 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-11-20 10:47:24,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5261 states. [2022-11-20 10:47:24,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5261 to 5261. [2022-11-20 10:47:24,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5261 states, 5260 states have (on average 1.5102661596958176) internal successors, (7944), 5260 states have internal predecessors, (7944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:24,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5261 states to 5261 states and 7944 transitions. [2022-11-20 10:47:24,437 INFO L78 Accepts]: Start accepts. Automaton has 5261 states and 7944 transitions. Word has length 94 [2022-11-20 10:47:24,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:47:24,438 INFO L495 AbstractCegarLoop]: Abstraction has 5261 states and 7944 transitions. [2022-11-20 10:47:24,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:24,438 INFO L276 IsEmpty]: Start isEmpty. Operand 5261 states and 7944 transitions. [2022-11-20 10:47:24,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-11-20 10:47:24,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:47:24,448 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:47:24,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 10:47:24,448 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:47:24,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:47:24,451 INFO L85 PathProgramCache]: Analyzing trace with hash 487011922, now seen corresponding path program 1 times [2022-11-20 10:47:24,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:47:24,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383288143] [2022-11-20 10:47:24,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:47:24,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:47:24,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:47:24,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:47:24,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:47:24,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383288143] [2022-11-20 10:47:24,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383288143] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:47:24,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338345655] [2022-11-20 10:47:24,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:47:24,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:47:24,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e22f9e-10b4-4ab3-b516-290cdb48b450/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:47:24,907 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e22f9e-10b4-4ab3-b516-290cdb48b450/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:47:24,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e22f9e-10b4-4ab3-b516-290cdb48b450/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:47:25,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:47:25,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 10:47:25,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:47:25,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 10:47:25,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:47:25,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338345655] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:47:25,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:47:25,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-11-20 10:47:25,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706891225] [2022-11-20 10:47:25,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:47:25,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:47:25,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:47:25,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:47:25,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:47:25,326 INFO L87 Difference]: Start difference. First operand 5261 states and 7944 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:29,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:47:29,694 INFO L93 Difference]: Finished difference Result 14275 states and 22313 transitions. [2022-11-20 10:47:29,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:47:29,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2022-11-20 10:47:29,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:47:29,727 INFO L225 Difference]: With dead ends: 14275 [2022-11-20 10:47:29,727 INFO L226 Difference]: Without dead ends: 9767 [2022-11-20 10:47:29,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:47:29,735 INFO L413 NwaCegarLoop]: 659 mSDtfsCounter, 621 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2456 mSolverCounterSat, 585 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 3041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 585 IncrementalHoareTripleChecker+Valid, 2456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:47:29,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [621 Valid, 666 Invalid, 3041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [585 Valid, 2456 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-20 10:47:29,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9767 states. [2022-11-20 10:47:29,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9767 to 9767. [2022-11-20 10:47:29,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9767 states, 9766 states have (on average 1.3878763055498669) internal successors, (13554), 9766 states have internal predecessors, (13554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:29,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9767 states to 9767 states and 13554 transitions. [2022-11-20 10:47:29,918 INFO L78 Accepts]: Start accepts. Automaton has 9767 states and 13554 transitions. Word has length 149 [2022-11-20 10:47:29,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:47:29,920 INFO L495 AbstractCegarLoop]: Abstraction has 9767 states and 13554 transitions. [2022-11-20 10:47:29,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:29,922 INFO L276 IsEmpty]: Start isEmpty. Operand 9767 states and 13554 transitions. [2022-11-20 10:47:29,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-11-20 10:47:29,924 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:47:29,924 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:47:29,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e22f9e-10b4-4ab3-b516-290cdb48b450/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 10:47:30,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e22f9e-10b4-4ab3-b516-290cdb48b450/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:47:30,130 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:47:30,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:47:30,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1750673786, now seen corresponding path program 1 times [2022-11-20 10:47:30,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:47:30,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082868717] [2022-11-20 10:47:30,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:47:30,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:47:30,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:47:30,497 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:47:30,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:47:30,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082868717] [2022-11-20 10:47:30,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082868717] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:47:30,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:47:30,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:47:30,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146052232] [2022-11-20 10:47:30,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:47:30,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:47:30,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:47:30,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:47:30,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:47:30,500 INFO L87 Difference]: Start difference. First operand 9767 states and 13554 transitions. Second operand has 4 states, 4 states have (on average 41.25) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:35,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:47:35,270 INFO L93 Difference]: Finished difference Result 23324 states and 32177 transitions. [2022-11-20 10:47:35,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:47:35,271 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2022-11-20 10:47:35,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:47:35,315 INFO L225 Difference]: With dead ends: 23324 [2022-11-20 10:47:35,315 INFO L226 Difference]: Without dead ends: 14273 [2022-11-20 10:47:35,325 INFO L412 NwaCegarLoop]: 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 [2022-11-20 10:47:35,326 INFO L413 NwaCegarLoop]: 694 mSDtfsCounter, 704 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 3107 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 3500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 3107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:47:35,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [704 Valid, 708 Invalid, 3500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 3107 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-11-20 10:47:35,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14273 states. [2022-11-20 10:47:35,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14273 to 14273. [2022-11-20 10:47:35,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14273 states, 14272 states have (on average 1.2779568385650224) internal successors, (18239), 14272 states have internal predecessors, (18239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:35,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14273 states to 14273 states and 18239 transitions. [2022-11-20 10:47:35,643 INFO L78 Accepts]: Start accepts. Automaton has 14273 states and 18239 transitions. Word has length 165 [2022-11-20 10:47:35,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:47:35,643 INFO L495 AbstractCegarLoop]: Abstraction has 14273 states and 18239 transitions. [2022-11-20 10:47:35,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:35,644 INFO L276 IsEmpty]: Start isEmpty. Operand 14273 states and 18239 transitions. [2022-11-20 10:47:35,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-11-20 10:47:35,647 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:47:35,648 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:47:35,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 10:47:35,648 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:47:35,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:47:35,649 INFO L85 PathProgramCache]: Analyzing trace with hash 894032909, now seen corresponding path program 1 times [2022-11-20 10:47:35,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:47:35,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426296004] [2022-11-20 10:47:35,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:47:35,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:47:35,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:47:35,842 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-20 10:47:35,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:47:35,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426296004] [2022-11-20 10:47:35,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426296004] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:47:35,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:47:35,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:47:35,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115291638] [2022-11-20 10:47:35,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:47:35,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:47:35,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:47:35,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:47:35,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:47:35,846 INFO L87 Difference]: Start difference. First operand 14273 states and 18239 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:40,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:47:40,067 INFO L93 Difference]: Finished difference Result 36805 states and 48361 transitions. [2022-11-20 10:47:40,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:47:40,068 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 239 [2022-11-20 10:47:40,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:47:40,114 INFO L225 Difference]: With dead ends: 36805 [2022-11-20 10:47:40,114 INFO L226 Difference]: Without dead ends: 23285 [2022-11-20 10:47:40,212 INFO L412 NwaCegarLoop]: 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 [2022-11-20 10:47:40,216 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 796 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2233 mSolverCounterSat, 705 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 2938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 705 IncrementalHoareTripleChecker+Valid, 2233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:47:40,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [796 Valid, 395 Invalid, 2938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [705 Valid, 2233 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-20 10:47:40,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23285 states. [2022-11-20 10:47:40,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23285 to 23285. [2022-11-20 10:47:40,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23285 states, 23284 states have (on average 1.2641728225390827) internal successors, (29435), 23284 states have internal predecessors, (29435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:40,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23285 states to 23285 states and 29435 transitions. [2022-11-20 10:47:40,538 INFO L78 Accepts]: Start accepts. Automaton has 23285 states and 29435 transitions. Word has length 239 [2022-11-20 10:47:40,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:47:40,539 INFO L495 AbstractCegarLoop]: Abstraction has 23285 states and 29435 transitions. [2022-11-20 10:47:40,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:40,540 INFO L276 IsEmpty]: Start isEmpty. Operand 23285 states and 29435 transitions. [2022-11-20 10:47:40,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-11-20 10:47:40,544 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:47:40,544 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-20 10:47:40,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 10:47:40,545 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:47:40,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:47:40,545 INFO L85 PathProgramCache]: Analyzing trace with hash -2133057864, now seen corresponding path program 1 times [2022-11-20 10:47:40,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:47:40,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822742943] [2022-11-20 10:47:40,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:47:40,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:47:40,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:47:40,836 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-11-20 10:47:40,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:47:40,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822742943] [2022-11-20 10:47:40,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822742943] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:47:40,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:47:40,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:47:40,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477441995] [2022-11-20 10:47:40,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:47:40,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:47:40,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:47:40,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:47:40,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:47:40,841 INFO L87 Difference]: Start difference. First operand 23285 states and 29435 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:45,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:47:45,133 INFO L93 Difference]: Finished difference Result 66094 states and 84228 transitions. [2022-11-20 10:47:45,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:47:45,133 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 270 [2022-11-20 10:47:45,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:47:45,217 INFO L225 Difference]: With dead ends: 66094 [2022-11-20 10:47:45,218 INFO L226 Difference]: Without dead ends: 43562 [2022-11-20 10:47:45,238 INFO L412 NwaCegarLoop]: 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 [2022-11-20 10:47:45,239 INFO L413 NwaCegarLoop]: 1403 mSDtfsCounter, 746 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2354 mSolverCounterSat, 539 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 1411 SdHoareTripleChecker+Invalid, 2893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 539 IncrementalHoareTripleChecker+Valid, 2354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:47:45,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [746 Valid, 1411 Invalid, 2893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [539 Valid, 2354 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-20 10:47:45,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43562 states. [2022-11-20 10:47:45,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43562 to 39056. [2022-11-20 10:47:45,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39056 states, 39055 states have (on average 1.188503392651389) internal successors, (46417), 39055 states have internal predecessors, (46417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:46,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39056 states to 39056 states and 46417 transitions. [2022-11-20 10:47:46,045 INFO L78 Accepts]: Start accepts. Automaton has 39056 states and 46417 transitions. Word has length 270 [2022-11-20 10:47:46,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:47:46,046 INFO L495 AbstractCegarLoop]: Abstraction has 39056 states and 46417 transitions. [2022-11-20 10:47:46,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:46,047 INFO L276 IsEmpty]: Start isEmpty. Operand 39056 states and 46417 transitions. [2022-11-20 10:47:46,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-11-20 10:47:46,056 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:47:46,057 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:47:46,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 10:47:46,057 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:47:46,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:47:46,058 INFO L85 PathProgramCache]: Analyzing trace with hash -722854976, now seen corresponding path program 1 times [2022-11-20 10:47:46,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:47:46,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251224876] [2022-11-20 10:47:46,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:47:46,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:47:46,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:47:46,759 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-20 10:47:46,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:47:46,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251224876] [2022-11-20 10:47:46,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251224876] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:47:46,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:47:46,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:47:46,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435202513] [2022-11-20 10:47:46,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:47:46,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:47:46,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:47:46,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:47:46,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:47:46,763 INFO L87 Difference]: Start difference. First operand 39056 states and 46417 transitions. Second operand has 4 states, 4 states have (on average 60.5) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:51,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:47:51,256 INFO L93 Difference]: Finished difference Result 77398 states and 92114 transitions. [2022-11-20 10:47:51,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:47:51,256 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 60.5) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have 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 [2022-11-20 10:47:51,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:47:51,310 INFO L225 Difference]: With dead ends: 77398 [2022-11-20 10:47:51,310 INFO L226 Difference]: Without dead ends: 39058 [2022-11-20 10:47:51,328 INFO L412 NwaCegarLoop]: 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 [2022-11-20 10:47:51,329 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 851 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 3408 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 3667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 3408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:47:51,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [851 Valid, 324 Invalid, 3667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 3408 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-20 10:47:51,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39058 states. [2022-11-20 10:47:51,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39058 to 39056. [2022-11-20 10:47:51,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39056 states, 39055 states have (on average 1.1725003200614519) internal successors, (45792), 39055 states have internal predecessors, (45792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:52,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39056 states to 39056 states and 45792 transitions. [2022-11-20 10:47:52,049 INFO L78 Accepts]: Start accepts. Automaton has 39056 states and 45792 transitions. Word has length 311 [2022-11-20 10:47:52,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:47:52,051 INFO L495 AbstractCegarLoop]: Abstraction has 39056 states and 45792 transitions. [2022-11-20 10:47:52,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.5) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:52,051 INFO L276 IsEmpty]: Start isEmpty. Operand 39056 states and 45792 transitions. [2022-11-20 10:47:52,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2022-11-20 10:47:52,061 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:47:52,061 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-20 10:47:52,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 10:47:52,061 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:47:52,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:47:52,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1133561799, now seen corresponding path program 1 times [2022-11-20 10:47:52,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:47:52,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228675438] [2022-11-20 10:47:52,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:47:52,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:47:52,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:47:52,481 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-20 10:47:52,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:47:52,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228675438] [2022-11-20 10:47:52,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228675438] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:47:52,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:47:52,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:47:52,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117038742] [2022-11-20 10:47:52,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:47:52,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:47:52,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:47:52,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:47:52,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:47:52,485 INFO L87 Difference]: Start difference. First operand 39056 states and 45792 transitions. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:56,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:47:56,981 INFO L93 Difference]: Finished difference Result 97636 states and 116556 transitions. [2022-11-20 10:47:56,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:47:56,984 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 329 [2022-11-20 10:47:56,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:47:57,085 INFO L225 Difference]: With dead ends: 97636 [2022-11-20 10:47:57,086 INFO L226 Difference]: Without dead ends: 59333 [2022-11-20 10:47:57,115 INFO L412 NwaCegarLoop]: 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 [2022-11-20 10:47:57,116 INFO L413 NwaCegarLoop]: 1361 mSDtfsCounter, 668 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2389 mSolverCounterSat, 518 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 1369 SdHoareTripleChecker+Invalid, 2907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 518 IncrementalHoareTripleChecker+Valid, 2389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:47:57,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [668 Valid, 1369 Invalid, 2907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [518 Valid, 2389 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-20 10:47:57,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59333 states. [2022-11-20 10:47:57,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59333 to 57080. [2022-11-20 10:47:57,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57080 states, 57079 states have (on average 1.1423290527164105) internal successors, (65203), 57079 states have internal predecessors, (65203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:57,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57080 states to 57080 states and 65203 transitions. [2022-11-20 10:47:57,849 INFO L78 Accepts]: Start accepts. Automaton has 57080 states and 65203 transitions. Word has length 329 [2022-11-20 10:47:57,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:47:57,850 INFO L495 AbstractCegarLoop]: Abstraction has 57080 states and 65203 transitions. [2022-11-20 10:47:57,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:57,850 INFO L276 IsEmpty]: Start isEmpty. Operand 57080 states and 65203 transitions. [2022-11-20 10:47:57,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2022-11-20 10:47:57,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:47:57,855 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-20 10:47:57,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 10:47:57,856 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:47:57,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:47:57,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1753823198, now seen corresponding path program 1 times [2022-11-20 10:47:57,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:47:57,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595894407] [2022-11-20 10:47:57,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:47:57,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:47:57,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:47:58,497 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-11-20 10:47:58,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:47:58,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595894407] [2022-11-20 10:47:58,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595894407] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:47:58,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:47:58,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:47:58,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214397938] [2022-11-20 10:47:58,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:47:58,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:47:58,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:47:58,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:47:58,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:47:58,502 INFO L87 Difference]: Start difference. First operand 57080 states and 65203 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:48:02,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:48:02,842 INFO L93 Difference]: Finished difference Result 133684 states and 155378 transitions. [2022-11-20 10:48:02,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:48:02,843 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 330 [2022-11-20 10:48:02,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:48:02,958 INFO L225 Difference]: With dead ends: 133684 [2022-11-20 10:48:02,958 INFO L226 Difference]: Without dead ends: 77357 [2022-11-20 10:48:02,985 INFO L412 NwaCegarLoop]: 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 [2022-11-20 10:48:02,985 INFO L413 NwaCegarLoop]: 416 mSDtfsCounter, 658 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1967 mSolverCounterSat, 841 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 2808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 841 IncrementalHoareTripleChecker+Valid, 1967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:48:02,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [658 Valid, 422 Invalid, 2808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [841 Valid, 1967 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-20 10:48:03,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77357 states. [2022-11-20 10:48:03,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77357 to 69096. [2022-11-20 10:48:03,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69096 states, 69095 states have (on average 1.1377957884072654) internal successors, (78616), 69095 states have internal predecessors, (78616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:48:04,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69096 states to 69096 states and 78616 transitions. [2022-11-20 10:48:04,086 INFO L78 Accepts]: Start accepts. Automaton has 69096 states and 78616 transitions. Word has length 330 [2022-11-20 10:48:04,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:48:04,087 INFO L495 AbstractCegarLoop]: Abstraction has 69096 states and 78616 transitions. [2022-11-20 10:48:04,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:48:04,088 INFO L276 IsEmpty]: Start isEmpty. Operand 69096 states and 78616 transitions. [2022-11-20 10:48:04,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2022-11-20 10:48:04,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:48:04,099 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:48:04,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 10:48:04,100 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:48:04,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:48:04,101 INFO L85 PathProgramCache]: Analyzing trace with hash 2086376952, now seen corresponding path program 1 times [2022-11-20 10:48:04,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:48:04,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953821806] [2022-11-20 10:48:04,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:48:04,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:48:04,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:48:05,119 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 64 proven. 333 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-11-20 10:48:05,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:48:05,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953821806] [2022-11-20 10:48:05,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953821806] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:48:05,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793604801] [2022-11-20 10:48:05,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:48:05,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:48:05,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e22f9e-10b4-4ab3-b516-290cdb48b450/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:48:05,121 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e22f9e-10b4-4ab3-b516-290cdb48b450/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:48:05,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e22f9e-10b4-4ab3-b516-290cdb48b450/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:48:05,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:48:05,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 10:48:05,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:48:05,486 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-11-20 10:48:05,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:48:05,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793604801] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:48:05,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:48:05,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-20 10:48:05,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875842177] [2022-11-20 10:48:05,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:48:05,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:48:05,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:48:05,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:48:05,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:48:05,490 INFO L87 Difference]: Start difference. First operand 69096 states and 78616 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 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) [2022-11-20 10:48:09,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:48:09,507 INFO L93 Difference]: Finished difference Result 152459 states and 173580 transitions. [2022-11-20 10:48:09,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:48:09,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 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) Word has length 446 [2022-11-20 10:48:09,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:48:09,590 INFO L225 Difference]: With dead ends: 152459 [2022-11-20 10:48:09,591 INFO L226 Difference]: Without dead ends: 84116 [2022-11-20 10:48:09,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 445 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:48:09,624 INFO L413 NwaCegarLoop]: 1109 mSDtfsCounter, 866 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2176 mSolverCounterSat, 481 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 866 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 2657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 481 IncrementalHoareTripleChecker+Valid, 2176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:48:09,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [866 Valid, 1117 Invalid, 2657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [481 Valid, 2176 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-20 10:48:09,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84116 states. [2022-11-20 10:48:10,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84116 to 84116. [2022-11-20 10:48:10,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84116 states, 84115 states have (on average 1.125280865481781) internal successors, (94653), 84115 states have internal predecessors, (94653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:48:11,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84116 states to 84116 states and 94653 transitions. [2022-11-20 10:48:11,093 INFO L78 Accepts]: Start accepts. Automaton has 84116 states and 94653 transitions. Word has length 446 [2022-11-20 10:48:11,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:48:11,094 INFO L495 AbstractCegarLoop]: Abstraction has 84116 states and 94653 transitions. [2022-11-20 10:48:11,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 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) [2022-11-20 10:48:11,094 INFO L276 IsEmpty]: Start isEmpty. Operand 84116 states and 94653 transitions. [2022-11-20 10:48:11,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2022-11-20 10:48:11,108 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:48:11,109 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:48:11,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e22f9e-10b4-4ab3-b516-290cdb48b450/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 10:48:11,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e22f9e-10b4-4ab3-b516-290cdb48b450/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:48:11,315 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:48:11,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:48:11,315 INFO L85 PathProgramCache]: Analyzing trace with hash -771262672, now seen corresponding path program 1 times [2022-11-20 10:48:11,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:48:11,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814786162] [2022-11-20 10:48:11,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:48:11,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:48:11,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:48:11,696 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 354 proven. 0 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-11-20 10:48:11,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:48:11,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814786162] [2022-11-20 10:48:11,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814786162] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:48:11,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:48:11,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:48:11,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947085024] [2022-11-20 10:48:11,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:48:11,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:48:11,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:48:11,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:48:11,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:48:11,701 INFO L87 Difference]: Start difference. First operand 84116 states and 94653 transitions. Second operand has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:48:16,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:48:16,493 INFO L93 Difference]: Finished difference Result 202025 states and 229597 transitions. [2022-11-20 10:48:16,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:48:16,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 487 [2022-11-20 10:48:16,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:48:16,634 INFO L225 Difference]: With dead ends: 202025 [2022-11-20 10:48:16,634 INFO L226 Difference]: Without dead ends: 114907 [2022-11-20 10:48:16,678 INFO L412 NwaCegarLoop]: 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 [2022-11-20 10:48:16,679 INFO L413 NwaCegarLoop]: 1275 mSDtfsCounter, 655 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2208 mSolverCounterSat, 611 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 1282 SdHoareTripleChecker+Invalid, 2819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 611 IncrementalHoareTripleChecker+Valid, 2208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:48:16,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [655 Valid, 1282 Invalid, 2819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [611 Valid, 2208 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-20 10:48:16,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114907 states. [2022-11-20 10:48:17,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114907 to 99887. [2022-11-20 10:48:18,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99887 states, 99886 states have (on average 1.1144204393008028) internal successors, (111315), 99886 states have internal predecessors, (111315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:48:18,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99887 states to 99887 states and 111315 transitions. [2022-11-20 10:48:18,118 INFO L78 Accepts]: Start accepts. Automaton has 99887 states and 111315 transitions. Word has length 487 [2022-11-20 10:48:18,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:48:18,119 INFO L495 AbstractCegarLoop]: Abstraction has 99887 states and 111315 transitions. [2022-11-20 10:48:18,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:48:18,119 INFO L276 IsEmpty]: Start isEmpty. Operand 99887 states and 111315 transitions. [2022-11-20 10:48:18,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 579 [2022-11-20 10:48:18,136 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:48:18,137 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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] [2022-11-20 10:48:18,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 10:48:18,137 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:48:18,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:48:18,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1051675525, now seen corresponding path program 1 times [2022-11-20 10:48:18,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:48:18,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962415070] [2022-11-20 10:48:18,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:48:18,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:48:18,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:48:20,146 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 493 proven. 229 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:48:20,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:48:20,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962415070] [2022-11-20 10:48:20,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962415070] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:48:20,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246788633] [2022-11-20 10:48:20,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:48:20,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:48:20,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e22f9e-10b4-4ab3-b516-290cdb48b450/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:48:20,149 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e22f9e-10b4-4ab3-b516-290cdb48b450/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:48:20,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e22f9e-10b4-4ab3-b516-290cdb48b450/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 10:48:20,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:48:20,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 10:48:20,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:48:20,506 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 705 trivial. 0 not checked. [2022-11-20 10:48:20,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:48:20,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246788633] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:48:20,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:48:20,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2022-11-20 10:48:20,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310573867] [2022-11-20 10:48:20,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:48:20,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:48:20,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:48:20,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:48:20,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:48:20,509 INFO L87 Difference]: Start difference. First operand 99887 states and 111315 transitions. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:48:24,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:48:24,895 INFO L93 Difference]: Finished difference Result 202776 states and 225721 transitions. [2022-11-20 10:48:24,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:48:24,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 578 [2022-11-20 10:48:24,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:48:25,009 INFO L225 Difference]: With dead ends: 202776 [2022-11-20 10:48:25,009 INFO L226 Difference]: Without dead ends: 103642 [2022-11-20 10:48:25,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 577 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:48:25,052 INFO L413 NwaCegarLoop]: 1173 mSDtfsCounter, 832 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2077 mSolverCounterSat, 597 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 1181 SdHoareTripleChecker+Invalid, 2674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 597 IncrementalHoareTripleChecker+Valid, 2077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:48:25,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [832 Valid, 1181 Invalid, 2674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [597 Valid, 2077 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-20 10:48:25,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103642 states. [2022-11-20 10:48:26,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103642 to 97634. [2022-11-20 10:48:26,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97634 states, 97633 states have (on average 1.072147736933209) internal successors, (104677), 97633 states have internal predecessors, (104677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:48:26,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97634 states to 97634 states and 104677 transitions. [2022-11-20 10:48:26,564 INFO L78 Accepts]: Start accepts. Automaton has 97634 states and 104677 transitions. Word has length 578 [2022-11-20 10:48:26,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:48:26,564 INFO L495 AbstractCegarLoop]: Abstraction has 97634 states and 104677 transitions. [2022-11-20 10:48:26,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:48:26,565 INFO L276 IsEmpty]: Start isEmpty. Operand 97634 states and 104677 transitions. [2022-11-20 10:48:26,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 580 [2022-11-20 10:48:26,579 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:48:26,580 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:48:26,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e22f9e-10b4-4ab3-b516-290cdb48b450/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 10:48:26,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e22f9e-10b4-4ab3-b516-290cdb48b450/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:48:26,786 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:48:26,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:48:26,787 INFO L85 PathProgramCache]: Analyzing trace with hash -341058602, now seen corresponding path program 1 times [2022-11-20 10:48:26,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:48:26,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421721904] [2022-11-20 10:48:26,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:48:26,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:48:26,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:48:27,140 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 579 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-11-20 10:48:27,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:48:27,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421721904] [2022-11-20 10:48:27,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421721904] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:48:27,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:48:27,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:48:27,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523158453] [2022-11-20 10:48:27,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:48:27,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:48:27,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:48:27,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:48:27,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:48:27,143 INFO L87 Difference]: Start difference. First operand 97634 states and 104677 transitions. Second operand has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:48:32,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:48:32,229 INFO L93 Difference]: Finished difference Result 228310 states and 245588 transitions. [2022-11-20 10:48:32,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:48:32,229 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 579 [2022-11-20 10:48:32,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:48:32,397 INFO L225 Difference]: With dead ends: 228310 [2022-11-20 10:48:32,397 INFO L226 Difference]: Without dead ends: 131429 [2022-11-20 10:48:32,449 INFO L412 NwaCegarLoop]: 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 [2022-11-20 10:48:32,450 INFO L413 NwaCegarLoop]: 1238 mSDtfsCounter, 667 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2291 mSolverCounterSat, 516 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 1246 SdHoareTripleChecker+Invalid, 2807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 516 IncrementalHoareTripleChecker+Valid, 2291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:48:32,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [667 Valid, 1246 Invalid, 2807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [516 Valid, 2291 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-20 10:48:32,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131429 states. [2022-11-20 10:48:33,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131429 to 119413. [2022-11-20 10:48:33,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119413 states, 119412 states have (on average 1.0641727799551133) internal successors, (127075), 119412 states have internal predecessors, (127075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:48:34,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119413 states to 119413 states and 127075 transitions. [2022-11-20 10:48:34,087 INFO L78 Accepts]: Start accepts. Automaton has 119413 states and 127075 transitions. Word has length 579 [2022-11-20 10:48:34,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:48:34,087 INFO L495 AbstractCegarLoop]: Abstraction has 119413 states and 127075 transitions. [2022-11-20 10:48:34,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:48:34,088 INFO L276 IsEmpty]: Start isEmpty. Operand 119413 states and 127075 transitions. [2022-11-20 10:48:34,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 602 [2022-11-20 10:48:34,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:48:34,097 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-20 10:48:34,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 10:48:34,098 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:48:34,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:48:34,098 INFO L85 PathProgramCache]: Analyzing trace with hash 907560909, now seen corresponding path program 1 times [2022-11-20 10:48:34,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:48:34,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944664246] [2022-11-20 10:48:34,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:48:34,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:48:34,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:48:35,464 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 568 proven. 110 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-11-20 10:48:35,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:48:35,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944664246] [2022-11-20 10:48:35,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944664246] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:48:35,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009757407] [2022-11-20 10:48:35,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:48:35,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:48:35,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e22f9e-10b4-4ab3-b516-290cdb48b450/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:48:35,466 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e22f9e-10b4-4ab3-b516-290cdb48b450/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:48:35,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e22f9e-10b4-4ab3-b516-290cdb48b450/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 10:48:35,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:48:35,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 10:48:35,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:48:35,755 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 773 trivial. 0 not checked. [2022-11-20 10:48:35,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:48:35,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009757407] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:48:35,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:48:35,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-20 10:48:35,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479131649] [2022-11-20 10:48:35,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:48:35,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:48:35,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:48:35,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:48:35,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:48:35,759 INFO L87 Difference]: Start difference. First operand 119413 states and 127075 transitions. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:48:40,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:48:40,550 INFO L93 Difference]: Finished difference Result 238073 states and 253392 transitions. [2022-11-20 10:48:40,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:48:40,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 601 [2022-11-20 10:48:40,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:48:40,714 INFO L225 Difference]: With dead ends: 238073 [2022-11-20 10:48:40,714 INFO L226 Difference]: Without dead ends: 119413 [2022-11-20 10:48:40,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 604 GetRequests, 600 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:48:40,774 INFO L413 NwaCegarLoop]: 1296 mSDtfsCounter, 783 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2084 mSolverCounterSat, 625 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 1304 SdHoareTripleChecker+Invalid, 2709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 625 IncrementalHoareTripleChecker+Valid, 2084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:48:40,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [783 Valid, 1304 Invalid, 2709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [625 Valid, 2084 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-20 10:48:40,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119413 states. [2022-11-20 10:48:42,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119413 to 104393. [2022-11-20 10:48:42,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104393 states, 104392 states have (on average 1.038240478197563) internal successors, (108384), 104392 states have internal predecessors, (108384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:48:42,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104393 states to 104393 states and 108384 transitions. [2022-11-20 10:48:42,396 INFO L78 Accepts]: Start accepts. Automaton has 104393 states and 108384 transitions. Word has length 601 [2022-11-20 10:48:42,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:48:42,396 INFO L495 AbstractCegarLoop]: Abstraction has 104393 states and 108384 transitions. [2022-11-20 10:48:42,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:48:42,396 INFO L276 IsEmpty]: Start isEmpty. Operand 104393 states and 108384 transitions. [2022-11-20 10:48:42,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 655 [2022-11-20 10:48:42,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:48:42,408 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:48:42,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e22f9e-10b4-4ab3-b516-290cdb48b450/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 10:48:42,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e22f9e-10b4-4ab3-b516-290cdb48b450/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 10:48:42,609 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:48:42,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:48:42,609 INFO L85 PathProgramCache]: Analyzing trace with hash 766311129, now seen corresponding path program 1 times [2022-11-20 10:48:42,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:48:42,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696206326] [2022-11-20 10:48:42,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:48:42,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:48:42,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:48:43,941 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 451 proven. 0 refuted. 0 times theorem prover too weak. 383 trivial. 0 not checked. [2022-11-20 10:48:43,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:48:43,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696206326] [2022-11-20 10:48:43,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696206326] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:48:43,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:48:43,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:48:43,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165035783] [2022-11-20 10:48:43,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:48:43,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:48:43,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:48:43,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:48:43,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:48:43,944 INFO L87 Difference]: Start difference. First operand 104393 states and 108384 transitions. Second operand has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:48:47,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:48:47,906 INFO L93 Difference]: Finished difference Result 223053 states and 231771 transitions. [2022-11-20 10:48:47,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:48:47,907 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 654 [2022-11-20 10:48:47,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:48:48,017 INFO L225 Difference]: With dead ends: 223053 [2022-11-20 10:48:48,017 INFO L226 Difference]: Without dead ends: 118662 [2022-11-20 10:48:48,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:48:48,056 INFO L413 NwaCegarLoop]: 905 mSDtfsCounter, 644 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2123 mSolverCounterSat, 566 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 2689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 566 IncrementalHoareTripleChecker+Valid, 2123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:48:48,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [644 Valid, 913 Invalid, 2689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [566 Valid, 2123 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-20 10:48:48,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118662 states. [2022-11-20 10:48:49,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118662 to 114156. [2022-11-20 10:48:49,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114156 states, 114155 states have (on average 1.037781963120319) internal successors, (118468), 114155 states have internal predecessors, (118468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:48:49,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114156 states to 114156 states and 118468 transitions. [2022-11-20 10:48:49,654 INFO L78 Accepts]: Start accepts. Automaton has 114156 states and 118468 transitions. Word has length 654 [2022-11-20 10:48:49,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:48:49,654 INFO L495 AbstractCegarLoop]: Abstraction has 114156 states and 118468 transitions. [2022-11-20 10:48:49,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:48:49,655 INFO L276 IsEmpty]: Start isEmpty. Operand 114156 states and 118468 transitions. [2022-11-20 10:48:50,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1174 [2022-11-20 10:48:50,253 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:48:50,265 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:48:50,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 10:48:50,267 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:48:50,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:48:50,267 INFO L85 PathProgramCache]: Analyzing trace with hash -520858787, now seen corresponding path program 1 times [2022-11-20 10:48:50,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:48:50,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723818718] [2022-11-20 10:48:50,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:48:50,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:48:50,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:48:53,357 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 600 proven. 0 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2022-11-20 10:48:53,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:48:53,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723818718] [2022-11-20 10:48:53,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723818718] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:48:53,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:48:53,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 10:48:53,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821380732] [2022-11-20 10:48:53,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:48:53,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:48:53,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:48:53,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:48:53,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:48:53,362 INFO L87 Difference]: Start difference. First operand 114156 states and 118468 transitions. Second operand has 6 states, 6 states have (on average 150.5) internal successors, (903), 6 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:04,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:49:04,620 INFO L93 Difference]: Finished difference Result 310323 states and 321801 transitions. [2022-11-20 10:49:04,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 10:49:04,620 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 150.5) internal successors, (903), 6 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1173 [2022-11-20 10:49:04,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:49:04,794 INFO L225 Difference]: With dead ends: 310323 [2022-11-20 10:49:04,794 INFO L226 Difference]: Without dead ends: 196169 [2022-11-20 10:49:04,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:49:04,835 INFO L413 NwaCegarLoop]: 534 mSDtfsCounter, 2983 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 8094 mSolverCounterSat, 2852 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2983 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 10946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2852 IncrementalHoareTripleChecker+Valid, 8094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:49:04,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2983 Valid, 602 Invalid, 10946 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2852 Valid, 8094 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2022-11-20 10:49:04,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196169 states. [2022-11-20 10:49:06,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196169 to 114907. [2022-11-20 10:49:06,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114907 states, 114906 states have (on average 1.0367778880128105) internal successors, (119132), 114906 states have internal predecessors, (119132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:07,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114907 states to 114907 states and 119132 transitions. [2022-11-20 10:49:07,074 INFO L78 Accepts]: Start accepts. Automaton has 114907 states and 119132 transitions. Word has length 1173 [2022-11-20 10:49:07,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:49:07,076 INFO L495 AbstractCegarLoop]: Abstraction has 114907 states and 119132 transitions. [2022-11-20 10:49:07,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 150.5) internal successors, (903), 6 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:07,076 INFO L276 IsEmpty]: Start isEmpty. Operand 114907 states and 119132 transitions. [2022-11-20 10:49:07,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1263 [2022-11-20 10:49:07,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:49:07,182 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:49:07,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-20 10:49:07,182 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:49:07,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:49:07,183 INFO L85 PathProgramCache]: Analyzing trace with hash -147848648, now seen corresponding path program 1 times [2022-11-20 10:49:07,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:49:07,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881749117] [2022-11-20 10:49:07,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:49:07,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms