./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label23.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label23.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa --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 adf96f71bf2a13ae5fd22bce01b9c481e5a9d21572a73a17cea58c8fcaecb44e --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 01:29:08,815 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 01:29:08,817 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 01:29:08,840 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 01:29:08,841 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 01:29:08,842 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 01:29:08,843 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 01:29:08,845 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 01:29:08,846 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 01:29:08,847 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 01:29:08,848 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 01:29:08,849 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 01:29:08,849 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 01:29:08,850 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 01:29:08,852 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 01:29:08,853 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 01:29:08,854 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 01:29:08,855 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 01:29:08,856 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 01:29:08,858 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 01:29:08,860 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 01:29:08,861 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 01:29:08,862 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 01:29:08,863 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 01:29:08,866 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 01:29:08,866 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 01:29:08,867 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 01:29:08,874 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 01:29:08,875 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 01:29:08,876 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 01:29:08,876 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 01:29:08,877 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 01:29:08,878 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 01:29:08,878 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 01:29:08,880 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 01:29:08,880 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 01:29:08,880 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 01:29:08,881 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 01:29:08,881 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 01:29:08,882 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 01:29:08,882 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 01:29:08,883 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-07 01:29:08,906 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 01:29:08,906 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 01:29:08,906 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 01:29:08,906 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 01:29:08,907 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 01:29:08,907 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 01:29:08,908 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 01:29:08,908 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 01:29:08,908 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 01:29:08,908 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 01:29:08,908 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 01:29:08,908 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 01:29:08,908 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 01:29:08,909 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 01:29:08,909 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 01:29:08,909 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 01:29:08,909 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 01:29:08,909 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 01:29:08,909 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 01:29:08,909 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 01:29:08,909 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 01:29:08,910 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 01:29:08,910 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 01:29:08,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 01:29:08,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:29:08,910 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 01:29:08,910 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 01:29:08,910 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 01:29:08,910 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 01:29:08,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 01:29:08,911 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 01:29:08,911 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 01:29:08,911 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 01:29:08,911 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 01:29:08,911 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_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> adf96f71bf2a13ae5fd22bce01b9c481e5a9d21572a73a17cea58c8fcaecb44e [2021-12-07 01:29:09,108 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 01:29:09,126 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 01:29:09,128 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 01:29:09,129 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 01:29:09,129 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 01:29:09,130 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/eca-rers2012/Problem13_label23.c [2021-12-07 01:29:09,179 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/data/fca2ce9d7/a16262c2dbc143c4b8564c01cc025c47/FLAG830bc9348 [2021-12-07 01:29:09,777 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 01:29:09,778 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/sv-benchmarks/c/eca-rers2012/Problem13_label23.c [2021-12-07 01:29:09,806 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/data/fca2ce9d7/a16262c2dbc143c4b8564c01cc025c47/FLAG830bc9348 [2021-12-07 01:29:10,206 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/data/fca2ce9d7/a16262c2dbc143c4b8564c01cc025c47 [2021-12-07 01:29:10,209 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 01:29:10,210 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 01:29:10,211 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 01:29:10,211 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 01:29:10,215 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 01:29:10,216 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:29:10" (1/1) ... [2021-12-07 01:29:10,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f2f841f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:29:10, skipping insertion in model container [2021-12-07 01:29:10,217 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:29:10" (1/1) ... [2021-12-07 01:29:10,225 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 01:29:10,359 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 01:29:10,522 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/sv-benchmarks/c/eca-rers2012/Problem13_label23.c[2192,2205] [2021-12-07 01:29:11,174 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:29:11,180 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 01:29:11,192 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/sv-benchmarks/c/eca-rers2012/Problem13_label23.c[2192,2205] [2021-12-07 01:29:11,642 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:29:11,661 INFO L208 MainTranslator]: Completed translation [2021-12-07 01:29:11,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:29:11 WrapperNode [2021-12-07 01:29:11,662 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 01:29:11,663 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 01:29:11,663 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 01:29:11,663 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 01:29:11,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:29:11" (1/1) ... [2021-12-07 01:29:11,731 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:29:11" (1/1) ... [2021-12-07 01:29:12,121 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-07 01:29:12,121 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 01:29:12,122 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 01:29:12,122 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 01:29:12,122 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 01:29:12,128 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:29:11" (1/1) ... [2021-12-07 01:29:12,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:29:11" (1/1) ... [2021-12-07 01:29:12,191 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:29:11" (1/1) ... [2021-12-07 01:29:12,192 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:29:11" (1/1) ... [2021-12-07 01:29:12,360 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:29:11" (1/1) ... [2021-12-07 01:29:12,388 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:29:11" (1/1) ... [2021-12-07 01:29:12,459 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:29:11" (1/1) ... [2021-12-07 01:29:12,498 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 01:29:12,499 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 01:29:12,499 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 01:29:12,499 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 01:29:12,500 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:29:11" (1/1) ... [2021-12-07 01:29:12,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:29:12,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:29:12,531 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 01:29:12,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 01:29:12,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 01:29:12,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 01:29:12,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 01:29:12,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 01:29:12,609 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 01:29:12,610 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 01:29:16,238 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 01:29:16,253 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 01:29:16,253 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-07 01:29:16,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:29:16 BoogieIcfgContainer [2021-12-07 01:29:16,256 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 01:29:16,257 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 01:29:16,257 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 01:29:16,260 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 01:29:16,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 01:29:10" (1/3) ... [2021-12-07 01:29:16,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58971bb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:29:16, skipping insertion in model container [2021-12-07 01:29:16,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:29:11" (2/3) ... [2021-12-07 01:29:16,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58971bb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:29:16, skipping insertion in model container [2021-12-07 01:29:16,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:29:16" (3/3) ... [2021-12-07 01:29:16,262 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label23.c [2021-12-07 01:29:16,266 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 01:29:16,266 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-07 01:29:16,305 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 01:29:16,310 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-07 01:29:16,310 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-07 01:29:16,339 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:16,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-07 01:29:16,343 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:16,343 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:29:16,344 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:16,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:16,348 INFO L85 PathProgramCache]: Analyzing trace with hash -461255479, now seen corresponding path program 1 times [2021-12-07 01:29:16,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:16,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359393446] [2021-12-07 01:29:16,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:16,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:16,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:16,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:29:16,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:29:16,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359393446] [2021-12-07 01:29:16,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359393446] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:29:16,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:29:16,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:29:16,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584409987] [2021-12-07 01:29:16,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:29:16,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:29:16,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:16,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:29:16,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:29:16,509 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:20,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:29:20,305 INFO L93 Difference]: Finished difference Result 3160 states and 5843 transitions. [2021-12-07 01:29:20,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:29:20,307 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-12-07 01:29:20,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:29:20,332 INFO L225 Difference]: With dead ends: 3160 [2021-12-07 01:29:20,332 INFO L226 Difference]: Without dead ends: 1983 [2021-12-07 01:29:20,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:29:20,342 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 1090 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 3030 mSolverCounterSat, 974 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1090 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 4004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 974 IncrementalHoareTripleChecker+Valid, 3030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:29:20,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1090 Valid, 340 Invalid, 4004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [974 Valid, 3030 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-12-07 01:29:20,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2021-12-07 01:29:20,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1930. [2021-12-07 01:29:20,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1930 states, 1929 states have (on average 1.7973043027475375) internal successors, (3467), 1929 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:20,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 3467 transitions. [2021-12-07 01:29:20,447 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 3467 transitions. Word has length 13 [2021-12-07 01:29:20,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:29:20,447 INFO L470 AbstractCegarLoop]: Abstraction has 1930 states and 3467 transitions. [2021-12-07 01:29:20,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:20,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 3467 transitions. [2021-12-07 01:29:20,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-07 01:29:20,450 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:20,450 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:29:20,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-07 01:29:20,450 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:20,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:20,451 INFO L85 PathProgramCache]: Analyzing trace with hash 365234242, now seen corresponding path program 1 times [2021-12-07 01:29:20,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:20,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620530910] [2021-12-07 01:29:20,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:20,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:20,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:20,569 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:29:20,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:29:20,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620530910] [2021-12-07 01:29:20,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620530910] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:29:20,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:29:20,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:29:20,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738633223] [2021-12-07 01:29:20,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:29:20,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:29:20,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:20,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:29:20,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:29:20,572 INFO L87 Difference]: Start difference. First operand 1930 states and 3467 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:23,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:29:23,201 INFO L93 Difference]: Finished difference Result 5456 states and 9917 transitions. [2021-12-07 01:29:23,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:29:23,201 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-12-07 01:29:23,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:29:23,216 INFO L225 Difference]: With dead ends: 5456 [2021-12-07 01:29:23,216 INFO L226 Difference]: Without dead ends: 3528 [2021-12-07 01:29:23,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:29:23,220 INFO L933 BasicCegarLoop]: 855 mSDtfsCounter, 923 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 2309 mSolverCounterSat, 878 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 3187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 878 IncrementalHoareTripleChecker+Valid, 2309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:29:23,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [923 Valid, 1007 Invalid, 3187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [878 Valid, 2309 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-07 01:29:23,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3528 states. [2021-12-07 01:29:23,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3528 to 3526. [2021-12-07 01:29:23,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3526 states, 3525 states have (on average 1.5670921985815602) internal successors, (5524), 3525 states have internal predecessors, (5524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:23,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3526 states to 3526 states and 5524 transitions. [2021-12-07 01:29:23,281 INFO L78 Accepts]: Start accepts. Automaton has 3526 states and 5524 transitions. Word has length 78 [2021-12-07 01:29:23,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:29:23,281 INFO L470 AbstractCegarLoop]: Abstraction has 3526 states and 5524 transitions. [2021-12-07 01:29:23,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:23,282 INFO L276 IsEmpty]: Start isEmpty. Operand 3526 states and 5524 transitions. [2021-12-07 01:29:23,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-07 01:29:23,284 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:23,284 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:29:23,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-07 01:29:23,285 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:23,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:23,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1133112465, now seen corresponding path program 1 times [2021-12-07 01:29:23,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:23,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274166108] [2021-12-07 01:29:23,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:23,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:23,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:23,351 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:29:23,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:29:23,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274166108] [2021-12-07 01:29:23,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274166108] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:29:23,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:29:23,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:29:23,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621690971] [2021-12-07 01:29:23,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:29:23,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:29:23,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:23,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:29:23,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:29:23,353 INFO L87 Difference]: Start difference. First operand 3526 states and 5524 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:26,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:29:26,054 INFO L93 Difference]: Finished difference Result 10232 states and 16097 transitions. [2021-12-07 01:29:26,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:29:26,055 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-12-07 01:29:26,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:29:26,079 INFO L225 Difference]: With dead ends: 10232 [2021-12-07 01:29:26,080 INFO L226 Difference]: Without dead ends: 6708 [2021-12-07 01:29:26,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:29:26,084 INFO L933 BasicCegarLoop]: 717 mSDtfsCounter, 972 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2534 mSolverCounterSat, 775 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 972 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 3309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 775 IncrementalHoareTripleChecker+Valid, 2534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:29:26,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [972 Valid, 850 Invalid, 3309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [775 Valid, 2534 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-07 01:29:26,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6708 states. [2021-12-07 01:29:26,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6708 to 6700. [2021-12-07 01:29:26,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6700 states, 6699 states have (on average 1.413046723391551) internal successors, (9466), 6699 states have internal predecessors, (9466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:26,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6700 states to 6700 states and 9466 transitions. [2021-12-07 01:29:26,192 INFO L78 Accepts]: Start accepts. Automaton has 6700 states and 9466 transitions. Word has length 84 [2021-12-07 01:29:26,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:29:26,192 INFO L470 AbstractCegarLoop]: Abstraction has 6700 states and 9466 transitions. [2021-12-07 01:29:26,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:26,193 INFO L276 IsEmpty]: Start isEmpty. Operand 6700 states and 9466 transitions. [2021-12-07 01:29:26,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-07 01:29:26,194 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:26,194 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:29:26,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-07 01:29:26,195 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:26,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:26,195 INFO L85 PathProgramCache]: Analyzing trace with hash 659309084, now seen corresponding path program 1 times [2021-12-07 01:29:26,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:26,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137430879] [2021-12-07 01:29:26,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:26,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:26,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:26,274 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:29:26,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:29:26,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137430879] [2021-12-07 01:29:26,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137430879] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:29:26,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:29:26,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:29:26,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522150193] [2021-12-07 01:29:26,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:29:26,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:29:26,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:26,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:29:26,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:29:26,277 INFO L87 Difference]: Start difference. First operand 6700 states and 9466 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:29,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:29:29,547 INFO L93 Difference]: Finished difference Result 17443 states and 24479 transitions. [2021-12-07 01:29:29,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:29:29,548 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-12-07 01:29:29,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:29:29,590 INFO L225 Difference]: With dead ends: 17443 [2021-12-07 01:29:29,590 INFO L226 Difference]: Without dead ends: 10745 [2021-12-07 01:29:29,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:29:29,600 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 844 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 3291 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 3741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 3291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:29:29,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [844 Valid, 965 Invalid, 3741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [450 Valid, 3291 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-07 01:29:29,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10745 states. [2021-12-07 01:29:29,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10745 to 10669. [2021-12-07 01:29:29,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10669 states, 10668 states have (on average 1.3562992125984252) internal successors, (14469), 10668 states have internal predecessors, (14469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:29,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10669 states to 10669 states and 14469 transitions. [2021-12-07 01:29:29,775 INFO L78 Accepts]: Start accepts. Automaton has 10669 states and 14469 transitions. Word has length 114 [2021-12-07 01:29:29,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:29:29,775 INFO L470 AbstractCegarLoop]: Abstraction has 10669 states and 14469 transitions. [2021-12-07 01:29:29,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:29,775 INFO L276 IsEmpty]: Start isEmpty. Operand 10669 states and 14469 transitions. [2021-12-07 01:29:29,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-07 01:29:29,777 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:29,778 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:29:29,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-07 01:29:29,778 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:29,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:29,778 INFO L85 PathProgramCache]: Analyzing trace with hash -606577547, now seen corresponding path program 1 times [2021-12-07 01:29:29,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:29,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707451361] [2021-12-07 01:29:29,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:29,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:29,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:29,841 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:29:29,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:29:29,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707451361] [2021-12-07 01:29:29,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707451361] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:29:29,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:29:29,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:29:29,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117406290] [2021-12-07 01:29:29,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:29:29,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:29:29,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:29,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:29:29,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:29:29,843 INFO L87 Difference]: Start difference. First operand 10669 states and 14469 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:32,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:29:32,602 INFO L93 Difference]: Finished difference Result 30031 states and 41242 transitions. [2021-12-07 01:29:32,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:29:32,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2021-12-07 01:29:32,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:29:32,637 INFO L225 Difference]: With dead ends: 30031 [2021-12-07 01:29:32,637 INFO L226 Difference]: Without dead ends: 20151 [2021-12-07 01:29:32,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:29:32,645 INFO L933 BasicCegarLoop]: 1010 mSDtfsCounter, 853 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 2484 mSolverCounterSat, 792 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 853 SdHoareTripleChecker+Valid, 1160 SdHoareTripleChecker+Invalid, 3276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 792 IncrementalHoareTripleChecker+Valid, 2484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:29:32,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [853 Valid, 1160 Invalid, 3276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [792 Valid, 2484 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-07 01:29:32,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20151 states. [2021-12-07 01:29:32,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20151 to 18550. [2021-12-07 01:29:32,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18550 states, 18549 states have (on average 1.252466440239366) internal successors, (23232), 18549 states have internal predecessors, (23232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:32,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18550 states to 18550 states and 23232 transitions. [2021-12-07 01:29:32,846 INFO L78 Accepts]: Start accepts. Automaton has 18550 states and 23232 transitions. Word has length 124 [2021-12-07 01:29:32,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:29:32,846 INFO L470 AbstractCegarLoop]: Abstraction has 18550 states and 23232 transitions. [2021-12-07 01:29:32,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:32,847 INFO L276 IsEmpty]: Start isEmpty. Operand 18550 states and 23232 transitions. [2021-12-07 01:29:32,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-07 01:29:32,848 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:32,848 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:29:32,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-07 01:29:32,849 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:32,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:32,849 INFO L85 PathProgramCache]: Analyzing trace with hash 889611492, now seen corresponding path program 1 times [2021-12-07 01:29:32,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:32,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901850034] [2021-12-07 01:29:32,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:32,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:32,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:32,920 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:29:32,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:29:32,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901850034] [2021-12-07 01:29:32,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901850034] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:29:32,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:29:32,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:29:32,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661448514] [2021-12-07 01:29:32,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:29:32,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:29:32,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:32,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:29:32,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:29:32,921 INFO L87 Difference]: Start difference. First operand 18550 states and 23232 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:35,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:29:35,822 INFO L93 Difference]: Finished difference Result 44989 states and 55638 transitions. [2021-12-07 01:29:35,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:29:35,822 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 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 129 [2021-12-07 01:29:35,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:29:35,856 INFO L225 Difference]: With dead ends: 44989 [2021-12-07 01:29:35,857 INFO L226 Difference]: Without dead ends: 26441 [2021-12-07 01:29:35,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:29:35,869 INFO L933 BasicCegarLoop]: 1030 mSDtfsCounter, 730 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 2714 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 2895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 2714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-07 01:29:35,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [730 Valid, 1214 Invalid, 2895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 2714 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-07 01:29:35,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26441 states. [2021-12-07 01:29:36,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26441 to 26434. [2021-12-07 01:29:36,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26434 states, 26433 states have (on average 1.2007717625695153) internal successors, (31740), 26433 states have internal predecessors, (31740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:36,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26434 states to 26434 states and 31740 transitions. [2021-12-07 01:29:36,141 INFO L78 Accepts]: Start accepts. Automaton has 26434 states and 31740 transitions. Word has length 129 [2021-12-07 01:29:36,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:29:36,142 INFO L470 AbstractCegarLoop]: Abstraction has 26434 states and 31740 transitions. [2021-12-07 01:29:36,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:36,142 INFO L276 IsEmpty]: Start isEmpty. Operand 26434 states and 31740 transitions. [2021-12-07 01:29:36,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-12-07 01:29:36,144 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:36,145 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:29:36,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-07 01:29:36,145 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:36,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:36,146 INFO L85 PathProgramCache]: Analyzing trace with hash -836746136, now seen corresponding path program 1 times [2021-12-07 01:29:36,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:36,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457170800] [2021-12-07 01:29:36,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:36,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:36,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:36,229 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:29:36,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:29:36,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457170800] [2021-12-07 01:29:36,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457170800] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:29:36,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:29:36,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:29:36,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536822158] [2021-12-07 01:29:36,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:29:36,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:29:36,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:36,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:29:36,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:29:36,231 INFO L87 Difference]: Start difference. First operand 26434 states and 31740 transitions. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:39,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:29:39,207 INFO L93 Difference]: Finished difference Result 72535 states and 87976 transitions. [2021-12-07 01:29:39,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:29:39,208 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 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 227 [2021-12-07 01:29:39,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:29:39,259 INFO L225 Difference]: With dead ends: 72535 [2021-12-07 01:29:39,259 INFO L226 Difference]: Without dead ends: 46103 [2021-12-07 01:29:39,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:29:39,280 INFO L933 BasicCegarLoop]: 1847 mSDtfsCounter, 840 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2479 mSolverCounterSat, 806 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 1984 SdHoareTripleChecker+Invalid, 3285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 806 IncrementalHoareTripleChecker+Valid, 2479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-07 01:29:39,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [840 Valid, 1984 Invalid, 3285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [806 Valid, 2479 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-07 01:29:39,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46103 states. [2021-12-07 01:29:39,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46103 to 42946. [2021-12-07 01:29:39,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42946 states, 42945 states have (on average 1.17205728257073) internal successors, (50334), 42945 states have internal predecessors, (50334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:39,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42946 states to 42946 states and 50334 transitions. [2021-12-07 01:29:39,723 INFO L78 Accepts]: Start accepts. Automaton has 42946 states and 50334 transitions. Word has length 227 [2021-12-07 01:29:39,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:29:39,724 INFO L470 AbstractCegarLoop]: Abstraction has 42946 states and 50334 transitions. [2021-12-07 01:29:39,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:39,724 INFO L276 IsEmpty]: Start isEmpty. Operand 42946 states and 50334 transitions. [2021-12-07 01:29:39,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-12-07 01:29:39,726 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:39,726 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:29:39,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-07 01:29:39,727 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:39,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:39,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1380443233, now seen corresponding path program 1 times [2021-12-07 01:29:39,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:39,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104500772] [2021-12-07 01:29:39,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:39,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:39,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:39,793 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-07 01:29:39,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:29:39,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104500772] [2021-12-07 01:29:39,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104500772] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:29:39,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:29:39,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:29:39,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53309228] [2021-12-07 01:29:39,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:29:39,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:29:39,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:39,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:29:39,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:29:39,796 INFO L87 Difference]: Start difference. First operand 42946 states and 50334 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:42,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:29:42,457 INFO L93 Difference]: Finished difference Result 85103 states and 99869 transitions. [2021-12-07 01:29:42,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:29:42,458 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 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 233 [2021-12-07 01:29:42,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:29:42,528 INFO L225 Difference]: With dead ends: 85103 [2021-12-07 01:29:42,529 INFO L226 Difference]: Without dead ends: 42946 [2021-12-07 01:29:42,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:29:42,547 INFO L933 BasicCegarLoop]: 1064 mSDtfsCounter, 700 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2501 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 2505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:29:42,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 1193 Invalid, 2505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2501 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-07 01:29:42,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42946 states. [2021-12-07 01:29:42,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42946 to 42946. [2021-12-07 01:29:42,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42946 states, 42945 states have (on average 1.1719408545814414) internal successors, (50329), 42945 states have internal predecessors, (50329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:42,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42946 states to 42946 states and 50329 transitions. [2021-12-07 01:29:42,971 INFO L78 Accepts]: Start accepts. Automaton has 42946 states and 50329 transitions. Word has length 233 [2021-12-07 01:29:42,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:29:42,972 INFO L470 AbstractCegarLoop]: Abstraction has 42946 states and 50329 transitions. [2021-12-07 01:29:42,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:42,972 INFO L276 IsEmpty]: Start isEmpty. Operand 42946 states and 50329 transitions. [2021-12-07 01:29:42,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-12-07 01:29:42,975 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:42,976 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:29:42,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-07 01:29:42,976 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:42,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:42,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1208046358, now seen corresponding path program 1 times [2021-12-07 01:29:42,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:42,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909221923] [2021-12-07 01:29:42,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:42,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:43,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:29:43,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:29:43,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909221923] [2021-12-07 01:29:43,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909221923] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:29:43,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:29:43,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:29:43,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293629443] [2021-12-07 01:29:43,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:29:43,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:29:43,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:43,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:29:43,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:29:43,051 INFO L87 Difference]: Start difference. First operand 42946 states and 50329 transitions. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:46,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:29:46,014 INFO L93 Difference]: Finished difference Result 104790 states and 124853 transitions. [2021-12-07 01:29:46,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:29:46,015 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 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 240 [2021-12-07 01:29:46,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:29:46,083 INFO L225 Difference]: With dead ends: 104790 [2021-12-07 01:29:46,084 INFO L226 Difference]: Without dead ends: 62633 [2021-12-07 01:29:46,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:29:46,152 INFO L933 BasicCegarLoop]: 811 mSDtfsCounter, 825 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2385 mSolverCounterSat, 900 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 825 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 3285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 900 IncrementalHoareTripleChecker+Valid, 2385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-07 01:29:46,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [825 Valid, 928 Invalid, 3285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [900 Valid, 2385 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-07 01:29:46,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62633 states. [2021-12-07 01:29:46,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62633 to 61048. [2021-12-07 01:29:46,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61048 states, 61047 states have (on average 1.161138139466313) internal successors, (70884), 61047 states have internal predecessors, (70884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:46,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61048 states to 61048 states and 70884 transitions. [2021-12-07 01:29:46,704 INFO L78 Accepts]: Start accepts. Automaton has 61048 states and 70884 transitions. Word has length 240 [2021-12-07 01:29:46,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:29:46,705 INFO L470 AbstractCegarLoop]: Abstraction has 61048 states and 70884 transitions. [2021-12-07 01:29:46,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:46,705 INFO L276 IsEmpty]: Start isEmpty. Operand 61048 states and 70884 transitions. [2021-12-07 01:29:46,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-12-07 01:29:46,707 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:46,707 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:29:46,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-07 01:29:46,707 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:46,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:46,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1350158918, now seen corresponding path program 1 times [2021-12-07 01:29:46,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:46,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651087428] [2021-12-07 01:29:46,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:46,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:46,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:46,795 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-07 01:29:46,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:29:46,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651087428] [2021-12-07 01:29:46,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651087428] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:29:46,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:29:46,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:29:46,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144536039] [2021-12-07 01:29:46,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:29:46,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:29:46,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:46,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:29:46,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:29:46,796 INFO L87 Difference]: Start difference. First operand 61048 states and 70884 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:49,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:29:49,494 INFO L93 Difference]: Finished difference Result 121305 states and 140973 transitions. [2021-12-07 01:29:49,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:29:49,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 254 [2021-12-07 01:29:49,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:29:49,553 INFO L225 Difference]: With dead ends: 121305 [2021-12-07 01:29:49,553 INFO L226 Difference]: Without dead ends: 61046 [2021-12-07 01:29:49,573 INFO L932 BasicCegarLoop]: 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 [2021-12-07 01:29:49,573 INFO L933 BasicCegarLoop]: 1357 mSDtfsCounter, 1193 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 2468 mSolverCounterSat, 445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1193 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 2913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 2468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:29:49,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1193 Valid, 1438 Invalid, 2913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 2468 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-07 01:29:49,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61046 states. [2021-12-07 01:29:50,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61046 to 61045. [2021-12-07 01:29:50,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61045 states, 61044 states have (on average 1.1303322193827403) internal successors, (69000), 61044 states have internal predecessors, (69000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:50,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61045 states to 61045 states and 69000 transitions. [2021-12-07 01:29:50,129 INFO L78 Accepts]: Start accepts. Automaton has 61045 states and 69000 transitions. Word has length 254 [2021-12-07 01:29:50,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:29:50,129 INFO L470 AbstractCegarLoop]: Abstraction has 61045 states and 69000 transitions. [2021-12-07 01:29:50,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:50,130 INFO L276 IsEmpty]: Start isEmpty. Operand 61045 states and 69000 transitions. [2021-12-07 01:29:50,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2021-12-07 01:29:50,133 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:50,133 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:29:50,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-07 01:29:50,133 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:50,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:50,134 INFO L85 PathProgramCache]: Analyzing trace with hash 290243953, now seen corresponding path program 1 times [2021-12-07 01:29:50,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:50,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640059327] [2021-12-07 01:29:50,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:50,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:50,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:50,349 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 150 proven. 113 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-07 01:29:50,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:29:50,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640059327] [2021-12-07 01:29:50,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640059327] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:29:50,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025134637] [2021-12-07 01:29:50,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:50,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:29:50,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:29:50,352 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:29:50,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 01:29:50,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:50,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-07 01:29:50,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:29:50,803 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-07 01:29:50,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:29:50,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025134637] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:29:50,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:29:50,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-12-07 01:29:50,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816728784] [2021-12-07 01:29:50,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:29:50,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:29:50,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:50,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:29:50,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-07 01:29:50,805 INFO L87 Difference]: Start difference. First operand 61045 states and 69000 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:53,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:29:53,489 INFO L93 Difference]: Finished difference Result 121290 states and 137196 transitions. [2021-12-07 01:29:53,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:29:53,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 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 319 [2021-12-07 01:29:53,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:29:53,553 INFO L225 Difference]: With dead ends: 121290 [2021-12-07 01:29:53,554 INFO L226 Difference]: Without dead ends: 61034 [2021-12-07 01:29:53,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-07 01:29:53,583 INFO L933 BasicCegarLoop]: 685 mSDtfsCounter, 1073 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 2392 mSolverCounterSat, 527 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1073 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 2919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 527 IncrementalHoareTripleChecker+Valid, 2392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:29:53,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1073 Valid, 816 Invalid, 2919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [527 Valid, 2392 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-07 01:29:53,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61034 states. [2021-12-07 01:29:54,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61034 to 61031. [2021-12-07 01:29:54,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61031 states, 61030 states have (on average 1.0942978862854333) internal successors, (66785), 61030 states have internal predecessors, (66785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:54,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61031 states to 61031 states and 66785 transitions. [2021-12-07 01:29:54,177 INFO L78 Accepts]: Start accepts. Automaton has 61031 states and 66785 transitions. Word has length 319 [2021-12-07 01:29:54,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:29:54,177 INFO L470 AbstractCegarLoop]: Abstraction has 61031 states and 66785 transitions. [2021-12-07 01:29:54,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:54,178 INFO L276 IsEmpty]: Start isEmpty. Operand 61031 states and 66785 transitions. [2021-12-07 01:29:54,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-12-07 01:29:54,184 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:54,185 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:29:54,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 01:29:54,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-07 01:29:54,387 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:54,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:54,388 INFO L85 PathProgramCache]: Analyzing trace with hash 448094546, now seen corresponding path program 1 times [2021-12-07 01:29:54,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:54,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752816661] [2021-12-07 01:29:54,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:54,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:54,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:54,586 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 412 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-12-07 01:29:54,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:29:54,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752816661] [2021-12-07 01:29:54,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752816661] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:29:54,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:29:54,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:29:54,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896377333] [2021-12-07 01:29:54,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:29:54,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:29:54,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:54,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:29:54,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:29:54,588 INFO L87 Difference]: Start difference. First operand 61031 states and 66785 transitions. Second operand has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:00,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:30:00,916 INFO L93 Difference]: Finished difference Result 160046 states and 175830 transitions. [2021-12-07 01:30:00,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:30:00,917 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 361 [2021-12-07 01:30:00,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:30:01,027 INFO L225 Difference]: With dead ends: 160046 [2021-12-07 01:30:01,027 INFO L226 Difference]: Without dead ends: 99804 [2021-12-07 01:30:01,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:30:01,056 INFO L933 BasicCegarLoop]: 611 mSDtfsCounter, 1701 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 6693 mSolverCounterSat, 1016 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1701 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 7709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1016 IncrementalHoareTripleChecker+Valid, 6693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-12-07 01:30:01,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1701 Valid, 849 Invalid, 7709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1016 Valid, 6693 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2021-12-07 01:30:01,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99804 states. [2021-12-07 01:30:01,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99804 to 76786. [2021-12-07 01:30:01,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76786 states, 76785 states have (on average 1.0868138308263333) internal successors, (83451), 76785 states have internal predecessors, (83451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:01,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76786 states to 76786 states and 83451 transitions. [2021-12-07 01:30:01,960 INFO L78 Accepts]: Start accepts. Automaton has 76786 states and 83451 transitions. Word has length 361 [2021-12-07 01:30:01,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:30:01,960 INFO L470 AbstractCegarLoop]: Abstraction has 76786 states and 83451 transitions. [2021-12-07 01:30:01,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:01,961 INFO L276 IsEmpty]: Start isEmpty. Operand 76786 states and 83451 transitions. [2021-12-07 01:30:01,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-12-07 01:30:01,965 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:30:01,965 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-12-07 01:30:01,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-07 01:30:01,965 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:30:01,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:30:01,966 INFO L85 PathProgramCache]: Analyzing trace with hash 976006743, now seen corresponding path program 1 times [2021-12-07 01:30:01,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:30:01,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314797561] [2021-12-07 01:30:01,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:30:01,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:30:02,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:02,066 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 216 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-07 01:30:02,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:30:02,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314797561] [2021-12-07 01:30:02,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314797561] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:30:02,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:30:02,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:30:02,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206369109] [2021-12-07 01:30:02,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:30:02,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:30:02,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:30:02,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:30:02,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:30:02,068 INFO L87 Difference]: Start difference. First operand 76786 states and 83451 transitions. Second operand has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:05,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:30:05,390 INFO L93 Difference]: Finished difference Result 177191 states and 193935 transitions. [2021-12-07 01:30:05,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:30:05,391 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 374 [2021-12-07 01:30:05,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:30:05,506 INFO L225 Difference]: With dead ends: 177191 [2021-12-07 01:30:05,506 INFO L226 Difference]: Without dead ends: 101194 [2021-12-07 01:30:05,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:30:05,547 INFO L933 BasicCegarLoop]: 811 mSDtfsCounter, 813 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2418 mSolverCounterSat, 932 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 813 SdHoareTripleChecker+Valid, 893 SdHoareTripleChecker+Invalid, 3350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 932 IncrementalHoareTripleChecker+Valid, 2418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-07 01:30:05,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [813 Valid, 893 Invalid, 3350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [932 Valid, 2418 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-07 01:30:05,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101194 states. [2021-12-07 01:30:06,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101194 to 99602. [2021-12-07 01:30:06,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99602 states, 99601 states have (on average 1.090099496993002) internal successors, (108575), 99601 states have internal predecessors, (108575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:06,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99602 states to 99602 states and 108575 transitions. [2021-12-07 01:30:06,592 INFO L78 Accepts]: Start accepts. Automaton has 99602 states and 108575 transitions. Word has length 374 [2021-12-07 01:30:06,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:30:06,592 INFO L470 AbstractCegarLoop]: Abstraction has 99602 states and 108575 transitions. [2021-12-07 01:30:06,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:06,592 INFO L276 IsEmpty]: Start isEmpty. Operand 99602 states and 108575 transitions. [2021-12-07 01:30:06,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2021-12-07 01:30:06,597 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:30:06,598 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:30:06,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-07 01:30:06,598 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:30:06,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:30:06,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1106420568, now seen corresponding path program 1 times [2021-12-07 01:30:06,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:30:06,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723377578] [2021-12-07 01:30:06,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:30:06,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:30:06,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:06,807 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 319 proven. 113 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-12-07 01:30:06,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:30:06,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723377578] [2021-12-07 01:30:06,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723377578] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:30:06,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618045507] [2021-12-07 01:30:06,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:30:06,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:30:06,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:30:06,809 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:30:06,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 01:30:06,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:06,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-07 01:30:06,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:30:07,286 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2021-12-07 01:30:07,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:30:07,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618045507] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:30:07,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:30:07,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-12-07 01:30:07,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801416140] [2021-12-07 01:30:07,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:30:07,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:30:07,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:30:07,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:30:07,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-07 01:30:07,288 INFO L87 Difference]: Start difference. First operand 99602 states and 108575 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:10,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:30:10,353 INFO L93 Difference]: Finished difference Result 199993 states and 217948 transitions. [2021-12-07 01:30:10,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:30:10,355 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 404 [2021-12-07 01:30:10,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:30:10,451 INFO L225 Difference]: With dead ends: 199993 [2021-12-07 01:30:10,451 INFO L226 Difference]: Without dead ends: 101180 [2021-12-07 01:30:10,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 403 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-07 01:30:10,472 INFO L933 BasicCegarLoop]: 1385 mSDtfsCounter, 1026 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 2486 mSolverCounterSat, 607 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1026 SdHoareTripleChecker+Valid, 1471 SdHoareTripleChecker+Invalid, 3093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 607 IncrementalHoareTripleChecker+Valid, 2486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:30:10,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1026 Valid, 1471 Invalid, 3093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [607 Valid, 2486 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-07 01:30:10,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101180 states. [2021-12-07 01:30:11,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101180 to 99594. [2021-12-07 01:30:11,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99594 states, 99593 states have (on average 1.0667014750032633) internal successors, (106236), 99593 states have internal predecessors, (106236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:11,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99594 states to 99594 states and 106236 transitions. [2021-12-07 01:30:11,427 INFO L78 Accepts]: Start accepts. Automaton has 99594 states and 106236 transitions. Word has length 404 [2021-12-07 01:30:11,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:30:11,427 INFO L470 AbstractCegarLoop]: Abstraction has 99594 states and 106236 transitions. [2021-12-07 01:30:11,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:11,428 INFO L276 IsEmpty]: Start isEmpty. Operand 99594 states and 106236 transitions. [2021-12-07 01:30:11,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2021-12-07 01:30:11,438 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:30:11,438 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-07 01:30:11,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-07 01:30:11,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-07 01:30:11,639 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:30:11,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:30:11,640 INFO L85 PathProgramCache]: Analyzing trace with hash -663684841, now seen corresponding path program 1 times [2021-12-07 01:30:11,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:30:11,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626679283] [2021-12-07 01:30:11,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:30:11,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:30:11,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:11,779 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 356 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-07 01:30:11,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:30:11,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626679283] [2021-12-07 01:30:11,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626679283] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:30:11,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:30:11,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:30:11,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514837915] [2021-12-07 01:30:11,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:30:11,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:30:11,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:30:11,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:30:11,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:30:11,781 INFO L87 Difference]: Start difference. First operand 99594 states and 106236 transitions. Second operand has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:14,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:30:14,780 INFO L93 Difference]: Finished difference Result 223599 states and 239290 transitions. [2021-12-07 01:30:14,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:30:14,781 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 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 486 [2021-12-07 01:30:14,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:30:14,906 INFO L225 Difference]: With dead ends: 223599 [2021-12-07 01:30:14,907 INFO L226 Difference]: Without dead ends: 123220 [2021-12-07 01:30:15,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:30:15,029 INFO L933 BasicCegarLoop]: 1740 mSDtfsCounter, 703 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 2523 mSolverCounterSat, 462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 703 SdHoareTripleChecker+Valid, 1883 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 462 IncrementalHoareTripleChecker+Valid, 2523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:30:15,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [703 Valid, 1883 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [462 Valid, 2523 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-07 01:30:15,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123220 states. [2021-12-07 01:30:16,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123220 to 123202. [2021-12-07 01:30:16,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123202 states, 123201 states have (on average 1.0590985462780333) internal successors, (130482), 123201 states have internal predecessors, (130482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:16,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123202 states to 123202 states and 130482 transitions. [2021-12-07 01:30:16,344 INFO L78 Accepts]: Start accepts. Automaton has 123202 states and 130482 transitions. Word has length 486 [2021-12-07 01:30:16,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:30:16,345 INFO L470 AbstractCegarLoop]: Abstraction has 123202 states and 130482 transitions. [2021-12-07 01:30:16,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:16,345 INFO L276 IsEmpty]: Start isEmpty. Operand 123202 states and 130482 transitions. [2021-12-07 01:30:16,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2021-12-07 01:30:16,356 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:30:16,357 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-12-07 01:30:16,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-07 01:30:16,357 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:30:16,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:30:16,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1195250089, now seen corresponding path program 1 times [2021-12-07 01:30:16,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:30:16,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816452852] [2021-12-07 01:30:16,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:30:16,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:30:16,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:16,534 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 262 proven. 110 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-07 01:30:16,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:30:16,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816452852] [2021-12-07 01:30:16,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816452852] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:30:16,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795329446] [2021-12-07 01:30:16,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:30:16,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:30:16,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:30:16,536 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:30:16,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 01:30:16,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:16,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-07 01:30:16,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:30:16,958 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2021-12-07 01:30:16,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:30:16,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795329446] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:30:16,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:30:16,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-07 01:30:16,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483576080] [2021-12-07 01:30:16,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:30:16,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:30:16,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:30:16,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:30:16,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-07 01:30:16,959 INFO L87 Difference]: Start difference. First operand 123202 states and 130482 transitions. Second operand has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:21,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:30:21,097 INFO L93 Difference]: Finished difference Result 282681 states and 299848 transitions. [2021-12-07 01:30:21,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:30:21,098 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 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 509 [2021-12-07 01:30:21,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:30:21,367 INFO L225 Difference]: With dead ends: 282681 [2021-12-07 01:30:21,367 INFO L226 Difference]: Without dead ends: 160268 [2021-12-07 01:30:21,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 508 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-07 01:30:21,404 INFO L933 BasicCegarLoop]: 419 mSDtfsCounter, 1025 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 2753 mSolverCounterSat, 932 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1025 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 3685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 932 IncrementalHoareTripleChecker+Valid, 2753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:30:21,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1025 Valid, 467 Invalid, 3685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [932 Valid, 2753 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-12-07 01:30:21,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160268 states. [2021-12-07 01:30:22,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160268 to 157048. [2021-12-07 01:30:22,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157048 states, 157047 states have (on average 1.0612173425789733) internal successors, (166661), 157047 states have internal predecessors, (166661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:23,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157048 states to 157048 states and 166661 transitions. [2021-12-07 01:30:23,159 INFO L78 Accepts]: Start accepts. Automaton has 157048 states and 166661 transitions. Word has length 509 [2021-12-07 01:30:23,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:30:23,160 INFO L470 AbstractCegarLoop]: Abstraction has 157048 states and 166661 transitions. [2021-12-07 01:30:23,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:23,160 INFO L276 IsEmpty]: Start isEmpty. Operand 157048 states and 166661 transitions. [2021-12-07 01:30:23,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 558 [2021-12-07 01:30:23,306 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:30:23,307 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:30:23,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 01:30:23,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-07 01:30:23,507 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:30:23,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:30:23,508 INFO L85 PathProgramCache]: Analyzing trace with hash -396042517, now seen corresponding path program 1 times [2021-12-07 01:30:23,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:30:23,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873525261] [2021-12-07 01:30:23,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:30:23,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:30:23,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:23,773 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 316 proven. 110 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-07 01:30:23,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:30:23,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873525261] [2021-12-07 01:30:23,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873525261] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:30:23,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917268050] [2021-12-07 01:30:23,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:30:23,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:30:23,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:30:23,774 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:30:23,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 01:30:23,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:23,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 01:30:23,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:30:24,842 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 302 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-07 01:30:24,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:30:24,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917268050] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:30:24,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:30:24,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-12-07 01:30:24,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440184723] [2021-12-07 01:30:24,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:30:24,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:30:24,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:30:24,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:30:24,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:30:24,844 INFO L87 Difference]: Start difference. First operand 157048 states and 166661 transitions. Second operand has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 2 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:27,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:30:27,951 INFO L93 Difference]: Finished difference Result 301511 states and 320520 transitions. [2021-12-07 01:30:27,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:30:27,951 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 2 states have internal predecessors, (424), 0 states have call successors, (0), 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 557 [2021-12-07 01:30:27,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:30:28,115 INFO L225 Difference]: With dead ends: 301511 [2021-12-07 01:30:28,115 INFO L226 Difference]: Without dead ends: 161783 [2021-12-07 01:30:28,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 556 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:30:28,172 INFO L933 BasicCegarLoop]: 1016 mSDtfsCounter, 546 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 2446 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 2558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 2446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:30:28,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [546 Valid, 1150 Invalid, 2558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 2446 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-07 01:30:28,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161783 states. [2021-12-07 01:30:29,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161783 to 160986. [2021-12-07 01:30:29,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160986 states, 160985 states have (on average 1.0561977824020872) internal successors, (170032), 160985 states have internal predecessors, (170032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:29,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160986 states to 160986 states and 170032 transitions. [2021-12-07 01:30:29,927 INFO L78 Accepts]: Start accepts. Automaton has 160986 states and 170032 transitions. Word has length 557 [2021-12-07 01:30:29,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:30:29,928 INFO L470 AbstractCegarLoop]: Abstraction has 160986 states and 170032 transitions. [2021-12-07 01:30:29,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 2 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:29,928 INFO L276 IsEmpty]: Start isEmpty. Operand 160986 states and 170032 transitions. [2021-12-07 01:30:29,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 577 [2021-12-07 01:30:29,946 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:30:29,946 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 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, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:30:29,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-07 01:30:30,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-07 01:30:30,148 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:30:30,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:30:30,150 INFO L85 PathProgramCache]: Analyzing trace with hash 291527895, now seen corresponding path program 1 times [2021-12-07 01:30:30,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:30:30,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458980410] [2021-12-07 01:30:30,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:30:30,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:30:30,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:30,342 INFO L134 CoverageAnalysis]: Checked inductivity of 987 backedges. 453 proven. 0 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2021-12-07 01:30:30,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:30:30,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458980410] [2021-12-07 01:30:30,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458980410] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:30:30,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:30:30,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:30:30,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329382666] [2021-12-07 01:30:30,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:30:30,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:30:30,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:30:30,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:30:30,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:30:30,345 INFO L87 Difference]: Start difference. First operand 160986 states and 170032 transitions. Second operand has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 2 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:32,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:30:32,960 INFO L93 Difference]: Finished difference Result 303059 states and 320766 transitions. [2021-12-07 01:30:32,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:30:32,961 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 2 states have internal predecessors, (301), 0 states have call successors, (0), 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 576 [2021-12-07 01:30:32,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:30:33,113 INFO L225 Difference]: With dead ends: 303059 [2021-12-07 01:30:33,113 INFO L226 Difference]: Without dead ends: 160970 [2021-12-07 01:30:33,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:30:33,156 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 1600 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1457 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1600 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 1469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:30:33,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1600 Valid, 290 Invalid, 1469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1457 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-07 01:30:33,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160970 states. [2021-12-07 01:30:34,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160970 to 160969. [2021-12-07 01:30:34,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160969 states, 160968 states have (on average 1.0560856816261617) internal successors, (169996), 160968 states have internal predecessors, (169996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:34,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160969 states to 160969 states and 169996 transitions. [2021-12-07 01:30:34,784 INFO L78 Accepts]: Start accepts. Automaton has 160969 states and 169996 transitions. Word has length 576 [2021-12-07 01:30:34,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:30:34,784 INFO L470 AbstractCegarLoop]: Abstraction has 160969 states and 169996 transitions. [2021-12-07 01:30:34,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 2 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:34,784 INFO L276 IsEmpty]: Start isEmpty. Operand 160969 states and 169996 transitions. [2021-12-07 01:30:34,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 582 [2021-12-07 01:30:34,798 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:30:34,798 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 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, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:30:34,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-07 01:30:34,799 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:30:34,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:30:34,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1659701664, now seen corresponding path program 1 times [2021-12-07 01:30:34,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:30:34,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140372469] [2021-12-07 01:30:34,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:30:34,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:30:34,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:34,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 471 proven. 0 refuted. 0 times theorem prover too weak. 542 trivial. 0 not checked. [2021-12-07 01:30:34,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:30:34,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140372469] [2021-12-07 01:30:34,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140372469] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:30:34,947 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:30:34,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:30:34,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959440979] [2021-12-07 01:30:34,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:30:34,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:30:34,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:30:34,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:30:34,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:30:34,950 INFO L87 Difference]: Start difference. First operand 160969 states and 169996 transitions. Second operand has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:38,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:30:38,528 INFO L93 Difference]: Finished difference Result 318007 states and 336001 transitions. [2021-12-07 01:30:38,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:30:38,529 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 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 581 [2021-12-07 01:30:38,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:30:38,708 INFO L225 Difference]: With dead ends: 318007 [2021-12-07 01:30:38,708 INFO L226 Difference]: Without dead ends: 157827 [2021-12-07 01:30:38,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:30:38,781 INFO L933 BasicCegarLoop]: 1631 mSDtfsCounter, 730 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2398 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 1763 SdHoareTripleChecker+Invalid, 2802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 2398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-07 01:30:38,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [730 Valid, 1763 Invalid, 2802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 2398 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-07 01:30:38,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157827 states. [2021-12-07 01:30:40,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157827 to 153882. [2021-12-07 01:30:40,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153882 states, 153881 states have (on average 1.046094059695479) internal successors, (160974), 153881 states have internal predecessors, (160974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:40,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153882 states to 153882 states and 160974 transitions. [2021-12-07 01:30:40,387 INFO L78 Accepts]: Start accepts. Automaton has 153882 states and 160974 transitions. Word has length 581 [2021-12-07 01:30:40,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:30:40,388 INFO L470 AbstractCegarLoop]: Abstraction has 153882 states and 160974 transitions. [2021-12-07 01:30:40,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:40,388 INFO L276 IsEmpty]: Start isEmpty. Operand 153882 states and 160974 transitions. [2021-12-07 01:30:40,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 591 [2021-12-07 01:30:40,397 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:30:40,398 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 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, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:30:40,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-07 01:30:40,398 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:30:40,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:30:40,398 INFO L85 PathProgramCache]: Analyzing trace with hash 2053964548, now seen corresponding path program 1 times [2021-12-07 01:30:40,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:30:40,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052377681] [2021-12-07 01:30:40,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:30:40,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:30:40,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:40,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1036 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 982 trivial. 0 not checked. [2021-12-07 01:30:40,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:30:40,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052377681] [2021-12-07 01:30:40,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052377681] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:30:40,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:30:40,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:30:40,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014822521] [2021-12-07 01:30:40,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:30:40,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:30:40,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:30:40,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:30:40,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:30:40,550 INFO L87 Difference]: Start difference. First operand 153882 states and 160974 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:44,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:30:44,261 INFO L93 Difference]: Finished difference Result 354975 states and 372097 transitions. [2021-12-07 01:30:44,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:30:44,262 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 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 590 [2021-12-07 01:30:44,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:30:44,570 INFO L225 Difference]: With dead ends: 354975 [2021-12-07 01:30:44,571 INFO L226 Difference]: Without dead ends: 213694 [2021-12-07 01:30:44,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:30:44,631 INFO L933 BasicCegarLoop]: 465 mSDtfsCounter, 993 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 2506 mSolverCounterSat, 749 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 993 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 3255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 749 IncrementalHoareTripleChecker+Valid, 2506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:30:44,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [993 Valid, 558 Invalid, 3255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [749 Valid, 2506 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-07 01:30:44,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213694 states. [2021-12-07 01:30:46,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213694 to 187720. [2021-12-07 01:30:46,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187720 states, 187719 states have (on average 1.0420255807883059) internal successors, (195608), 187719 states have internal predecessors, (195608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:46,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187720 states to 187720 states and 195608 transitions. [2021-12-07 01:30:46,688 INFO L78 Accepts]: Start accepts. Automaton has 187720 states and 195608 transitions. Word has length 590 [2021-12-07 01:30:46,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:30:46,688 INFO L470 AbstractCegarLoop]: Abstraction has 187720 states and 195608 transitions. [2021-12-07 01:30:46,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:46,805 INFO L276 IsEmpty]: Start isEmpty. Operand 187720 states and 195608 transitions. [2021-12-07 01:30:46,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 813 [2021-12-07 01:30:46,846 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:30:46,846 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 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, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:30:46,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-07 01:30:46,846 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:30:46,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:30:46,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1737443257, now seen corresponding path program 1 times [2021-12-07 01:30:46,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:30:46,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453490412] [2021-12-07 01:30:46,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:30:46,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:30:46,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:47,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 471 proven. 0 refuted. 0 times theorem prover too weak. 542 trivial. 0 not checked. [2021-12-07 01:30:47,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:30:47,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453490412] [2021-12-07 01:30:47,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453490412] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:30:47,078 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:30:47,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:30:47,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789600916] [2021-12-07 01:30:47,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:30:47,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:30:47,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:30:47,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:30:47,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:30:47,080 INFO L87 Difference]: Start difference. First operand 187720 states and 195608 transitions. Second operand has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:50,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:30:50,418 INFO L93 Difference]: Finished difference Result 365964 states and 381854 transitions. [2021-12-07 01:30:50,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:30:50,419 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 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 812 [2021-12-07 01:30:50,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:30:50,618 INFO L225 Difference]: With dead ends: 365964 [2021-12-07 01:30:50,618 INFO L226 Difference]: Without dead ends: 190844 [2021-12-07 01:30:50,673 INFO L932 BasicCegarLoop]: 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 [2021-12-07 01:30:50,674 INFO L933 BasicCegarLoop]: 344 mSDtfsCounter, 901 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2205 mSolverCounterSat, 675 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 901 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 2880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 675 IncrementalHoareTripleChecker+Valid, 2205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:30:50,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [901 Valid, 355 Invalid, 2880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [675 Valid, 2205 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-07 01:30:50,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190844 states. [2021-12-07 01:30:52,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190844 to 190057. [2021-12-07 01:30:52,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190057 states, 190056 states have (on average 1.0399092898935052) internal successors, (197641), 190056 states have internal predecessors, (197641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:52,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190057 states to 190057 states and 197641 transitions. [2021-12-07 01:30:52,708 INFO L78 Accepts]: Start accepts. Automaton has 190057 states and 197641 transitions. Word has length 812 [2021-12-07 01:30:52,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:30:52,709 INFO L470 AbstractCegarLoop]: Abstraction has 190057 states and 197641 transitions. [2021-12-07 01:30:52,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:52,709 INFO L276 IsEmpty]: Start isEmpty. Operand 190057 states and 197641 transitions. [2021-12-07 01:30:52,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 946 [2021-12-07 01:30:52,757 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:30:52,758 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:30:52,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-07 01:30:52,758 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:30:52,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:30:52,759 INFO L85 PathProgramCache]: Analyzing trace with hash -2132282626, now seen corresponding path program 1 times [2021-12-07 01:30:52,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:30:52,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410863262] [2021-12-07 01:30:52,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:30:52,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:30:52,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:53,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1463 backedges. 829 proven. 351 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2021-12-07 01:30:53,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:30:53,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410863262] [2021-12-07 01:30:53,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410863262] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:30:53,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694828963] [2021-12-07 01:30:53,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:30:53,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:30:53,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:30:53,148 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:30:53,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-07 01:30:53,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:53,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 1189 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 01:30:53,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:30:54,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1463 backedges. 831 proven. 0 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2021-12-07 01:30:54,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:30:54,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694828963] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:30:54,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:30:54,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-07 01:30:54,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719258375] [2021-12-07 01:30:54,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:30:54,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:30:54,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:30:54,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:30:54,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:30:54,164 INFO L87 Difference]: Start difference. First operand 190057 states and 197641 transitions. Second operand has 4 states, 4 states have (on average 154.25) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:31:00,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:31:00,912 INFO L93 Difference]: Finished difference Result 421958 states and 438815 transitions. [2021-12-07 01:31:00,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:31:00,913 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 154.25) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 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 945 [2021-12-07 01:31:00,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:31:01,163 INFO L225 Difference]: With dead ends: 421958 [2021-12-07 01:31:01,163 INFO L226 Difference]: Without dead ends: 232690 [2021-12-07 01:31:01,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 948 GetRequests, 943 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:31:01,218 INFO L933 BasicCegarLoop]: 592 mSDtfsCounter, 1644 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 6029 mSolverCounterSat, 647 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1644 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 6676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 647 IncrementalHoareTripleChecker+Valid, 6029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-12-07 01:31:01,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1644 Valid, 804 Invalid, 6676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [647 Valid, 6029 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2021-12-07 01:31:01,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232690 states. [2021-12-07 01:31:03,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232690 to 228655. [2021-12-07 01:31:03,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228655 states, 228654 states have (on average 1.0397631355672763) internal successors, (237746), 228654 states have internal predecessors, (237746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:31:03,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228655 states to 228655 states and 237746 transitions. [2021-12-07 01:31:03,610 INFO L78 Accepts]: Start accepts. Automaton has 228655 states and 237746 transitions. Word has length 945 [2021-12-07 01:31:03,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:31:03,611 INFO L470 AbstractCegarLoop]: Abstraction has 228655 states and 237746 transitions. [2021-12-07 01:31:03,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 154.25) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:31:03,611 INFO L276 IsEmpty]: Start isEmpty. Operand 228655 states and 237746 transitions. [2021-12-07 01:31:03,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1100 [2021-12-07 01:31:03,659 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:31:03,660 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 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, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-07 01:31:03,683 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-07 01:31:03,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:31:03,862 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:31:03,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:31:03,864 INFO L85 PathProgramCache]: Analyzing trace with hash 379030924, now seen corresponding path program 1 times [2021-12-07 01:31:03,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:31:03,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707320675] [2021-12-07 01:31:03,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:31:03,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:31:04,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:04,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 790 proven. 356 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-07 01:31:04,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:31:04,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707320675] [2021-12-07 01:31:04,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707320675] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:31:04,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581447007] [2021-12-07 01:31:04,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:31:04,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:31:04,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:31:04,420 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:31:04,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-07 01:31:04,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:04,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 1326 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-07 01:31:04,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:31:05,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 957 proven. 190 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-12-07 01:31:05,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:31:07,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 1056 proven. 91 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-12-07 01:31:07,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581447007] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:31:07,067 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:31:07,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2021-12-07 01:31:07,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080978412] [2021-12-07 01:31:07,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:31:07,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 01:31:07,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:31:07,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 01:31:07,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:31:07,071 INFO L87 Difference]: Start difference. First operand 228655 states and 237746 transitions. Second operand has 10 states, 10 states have (on average 213.7) internal successors, (2137), 10 states have internal predecessors, (2137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:31:42,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:31:42,794 INFO L93 Difference]: Finished difference Result 730795 states and 761015 transitions. [2021-12-07 01:31:42,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-07 01:31:42,795 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 213.7) internal successors, (2137), 10 states have internal predecessors, (2137), 0 states have call successors, (0), 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 1099 [2021-12-07 01:31:42,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:31:43,438 INFO L225 Difference]: With dead ends: 730795 [2021-12-07 01:31:43,438 INFO L226 Difference]: Without dead ends: 492696 [2021-12-07 01:31:43,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2270 GetRequests, 2227 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=439, Invalid=1541, Unknown=0, NotChecked=0, Total=1980 [2021-12-07 01:31:43,564 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 39946 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 41731 mSolverCounterSat, 11845 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39946 SdHoareTripleChecker+Valid, 1203 SdHoareTripleChecker+Invalid, 53576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11845 IncrementalHoareTripleChecker+Valid, 41731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:31:43,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39946 Valid, 1203 Invalid, 53576 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11845 Valid, 41731 Invalid, 0 Unknown, 0 Unchecked, 32.6s Time] [2021-12-07 01:31:43,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492696 states. [2021-12-07 01:31:47,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492696 to 423162. [2021-12-07 01:31:48,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423162 states, 423161 states have (on average 1.0321437939696712) internal successors, (436763), 423161 states have internal predecessors, (436763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:31:48,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423162 states to 423162 states and 436763 transitions. [2021-12-07 01:31:48,749 INFO L78 Accepts]: Start accepts. Automaton has 423162 states and 436763 transitions. Word has length 1099 [2021-12-07 01:31:48,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:31:48,750 INFO L470 AbstractCegarLoop]: Abstraction has 423162 states and 436763 transitions. [2021-12-07 01:31:48,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 213.7) internal successors, (2137), 10 states have internal predecessors, (2137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:31:48,750 INFO L276 IsEmpty]: Start isEmpty. Operand 423162 states and 436763 transitions. [2021-12-07 01:31:48,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1230 [2021-12-07 01:31:48,815 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:31:48,816 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-07 01:31:48,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-07 01:31:49,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:31:49,018 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:31:49,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:31:49,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1413072694, now seen corresponding path program 1 times [2021-12-07 01:31:49,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:31:49,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985416973] [2021-12-07 01:31:49,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:31:49,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:31:49,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:49,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1793 backedges. 1113 proven. 351 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2021-12-07 01:31:49,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:31:49,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985416973] [2021-12-07 01:31:49,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985416973] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:31:49,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103063990] [2021-12-07 01:31:49,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:31:49,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:31:49,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:31:49,430 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:31:49,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-07 01:31:49,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:49,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 1480 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 01:31:49,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:31:51,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1793 backedges. 1365 proven. 0 refuted. 0 times theorem prover too weak. 428 trivial. 0 not checked. [2021-12-07 01:31:51,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:31:51,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103063990] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:31:51,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:31:51,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-12-07 01:31:51,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782054086] [2021-12-07 01:31:51,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:31:51,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:31:51,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:31:51,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:31:51,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:31:51,200 INFO L87 Difference]: Start difference. First operand 423162 states and 436763 transitions. Second operand has 4 states, 4 states have (on average 226.0) internal successors, (904), 3 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:31:58,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:31:58,043 INFO L93 Difference]: Finished difference Result 923503 states and 953678 transitions. [2021-12-07 01:31:58,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:31:58,044 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 226.0) internal successors, (904), 3 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1229 [2021-12-07 01:31:58,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:31:58,644 INFO L225 Difference]: With dead ends: 923503 [2021-12-07 01:31:58,644 INFO L226 Difference]: Without dead ends: 514525 [2021-12-07 01:31:58,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1232 GetRequests, 1228 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:31:58,747 INFO L933 BasicCegarLoop]: 503 mSDtfsCounter, 1339 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 4798 mSolverCounterSat, 582 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1339 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 5380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 582 IncrementalHoareTripleChecker+Valid, 4798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:31:58,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1339 Valid, 691 Invalid, 5380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [582 Valid, 4798 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-12-07 01:31:59,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514525 states. [2021-12-07 01:32:03,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514525 to 490075. [2021-12-07 01:32:03,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490075 states, 490074 states have (on average 1.0312075319237504) internal successors, (505368), 490074 states have internal predecessors, (505368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:32:04,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490075 states to 490075 states and 505368 transitions. [2021-12-07 01:32:04,668 INFO L78 Accepts]: Start accepts. Automaton has 490075 states and 505368 transitions. Word has length 1229 [2021-12-07 01:32:04,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:32:04,669 INFO L470 AbstractCegarLoop]: Abstraction has 490075 states and 505368 transitions. [2021-12-07 01:32:04,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 226.0) internal successors, (904), 3 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:32:04,669 INFO L276 IsEmpty]: Start isEmpty. Operand 490075 states and 505368 transitions. [2021-12-07 01:32:04,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1258 [2021-12-07 01:32:04,769 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:32:04,769 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:32:04,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-07 01:32:04,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d297eb7-c2fb-489b-a51c-59e305aa6a2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-07 01:32:04,972 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:32:04,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:32:04,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1370362374, now seen corresponding path program 1 times [2021-12-07 01:32:04,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:32:04,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168212113] [2021-12-07 01:32:04,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:32:04,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:32:05,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:05,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1872 backedges. 1766 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-12-07 01:32:05,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:32:05,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168212113] [2021-12-07 01:32:05,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168212113] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:32:05,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:32:05,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-07 01:32:05,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801149757] [2021-12-07 01:32:05,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:32:05,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 01:32:05,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:32:05,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 01:32:05,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:32:05,482 INFO L87 Difference]: Start difference. First operand 490075 states and 505368 transitions. Second operand has 6 states, 6 states have (on average 192.16666666666666) internal successors, (1153), 6 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:32:17,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:32:17,242 INFO L93 Difference]: Finished difference Result 1105367 states and 1139993 transitions. [2021-12-07 01:32:17,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:32:17,243 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 192.16666666666666) internal successors, (1153), 6 states have internal predecessors, (1153), 0 states have call successors, (0), 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 1257 [2021-12-07 01:32:17,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:32:18,065 INFO L225 Difference]: With dead ends: 1105367 [2021-12-07 01:32:18,065 INFO L226 Difference]: Without dead ends: 630263 [2021-12-07 01:32:18,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:32:18,206 INFO L933 BasicCegarLoop]: 561 mSDtfsCounter, 3088 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 13702 mSolverCounterSat, 1270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3088 SdHoareTripleChecker+Valid, 1143 SdHoareTripleChecker+Invalid, 14972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1270 IncrementalHoareTripleChecker+Valid, 13702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:32:18,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3088 Valid, 1143 Invalid, 14972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1270 Valid, 13702 Invalid, 0 Unknown, 0 Unchecked, 9.0s Time] [2021-12-07 01:32:18,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630263 states. [2021-12-07 01:32:24,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630263 to 583787. [2021-12-07 01:32:24,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583787 states, 583786 states have (on average 1.028066791598291) internal successors, (600171), 583786 states have internal predecessors, (600171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:32:25,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583787 states to 583787 states and 600171 transitions. [2021-12-07 01:32:25,318 INFO L78 Accepts]: Start accepts. Automaton has 583787 states and 600171 transitions. Word has length 1257 [2021-12-07 01:32:25,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:32:25,319 INFO L470 AbstractCegarLoop]: Abstraction has 583787 states and 600171 transitions. [2021-12-07 01:32:25,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 192.16666666666666) internal successors, (1153), 6 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:32:25,319 INFO L276 IsEmpty]: Start isEmpty. Operand 583787 states and 600171 transitions. [2021-12-07 01:32:25,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1400 [2021-12-07 01:32:25,439 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:32:25,440 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2021-12-07 01:32:25,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-07 01:32:25,440 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:32:25,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:32:25,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1811724957, now seen corresponding path program 1 times [2021-12-07 01:32:25,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:32:25,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108820992] [2021-12-07 01:32:25,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:32:25,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:32:25,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:25,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1732 backedges. 1526 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-12-07 01:32:25,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:32:25,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108820992] [2021-12-07 01:32:25,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108820992] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:32:25,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:32:25,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:32:25,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499796853] [2021-12-07 01:32:25,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:32:25,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:32:25,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:32:25,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:32:25,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:32:25,951 INFO L87 Difference]: Start difference. First operand 583787 states and 600171 transitions. Second operand has 3 states, 3 states have (on average 402.3333333333333) internal successors, (1207), 3 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:32:31,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:32:31,324 INFO L93 Difference]: Finished difference Result 1150258 states and 1182724 transitions. [2021-12-07 01:32:31,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:32:31,325 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 402.3333333333333) internal successors, (1207), 3 states have internal predecessors, (1207), 0 states have call successors, (0), 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 1399 [2021-12-07 01:32:31,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:32:32,042 INFO L225 Difference]: With dead ends: 1150258 [2021-12-07 01:32:32,043 INFO L226 Difference]: Without dead ends: 583018 [2021-12-07 01:32:32,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:32:32,396 INFO L933 BasicCegarLoop]: 1585 mSDtfsCounter, 417 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 2404 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 1711 SdHoareTripleChecker+Invalid, 2525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 2404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-07 01:32:32,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 1711 Invalid, 2525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 2404 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-07 01:32:32,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583018 states. [2021-12-07 01:32:38,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583018 to 570406. [2021-12-07 01:32:38,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570406 states, 570405 states have (on average 1.0264180713703421) internal successors, (585474), 570405 states have internal predecessors, (585474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:32:39,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570406 states to 570406 states and 585474 transitions. [2021-12-07 01:32:39,493 INFO L78 Accepts]: Start accepts. Automaton has 570406 states and 585474 transitions. Word has length 1399 [2021-12-07 01:32:39,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:32:39,493 INFO L470 AbstractCegarLoop]: Abstraction has 570406 states and 585474 transitions. [2021-12-07 01:32:39,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 402.3333333333333) internal successors, (1207), 3 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:32:39,494 INFO L276 IsEmpty]: Start isEmpty. Operand 570406 states and 585474 transitions. [2021-12-07 01:32:39,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1451 [2021-12-07 01:32:39,615 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:32:39,615 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:32:39,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-07 01:32:39,616 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:32:39,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:32:39,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1527892860, now seen corresponding path program 1 times [2021-12-07 01:32:39,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:32:39,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122645957] [2021-12-07 01:32:39,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:32:39,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:32:39,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:40,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1901 backedges. 1335 proven. 0 refuted. 0 times theorem prover too weak. 566 trivial. 0 not checked. [2021-12-07 01:32:40,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:32:40,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122645957] [2021-12-07 01:32:40,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122645957] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:32:40,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:32:40,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:32:40,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200888937] [2021-12-07 01:32:40,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:32:40,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:32:40,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:32:40,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:32:40,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:32:40,218 INFO L87 Difference]: Start difference. First operand 570406 states and 585474 transitions. Second operand has 4 states, 4 states have (on average 243.75) internal successors, (975), 3 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:32:47,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:32:47,824 INFO L93 Difference]: Finished difference Result 1199079 states and 1231341 transitions. [2021-12-07 01:32:47,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:32:47,825 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 243.75) internal successors, (975), 3 states have internal predecessors, (975), 0 states have call successors, (0), 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 1450 [2021-12-07 01:32:47,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:32:48,572 INFO L225 Difference]: With dead ends: 1199079 [2021-12-07 01:32:48,572 INFO L226 Difference]: Without dead ends: 648371 [2021-12-07 01:32:48,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:32:48,965 INFO L933 BasicCegarLoop]: 548 mSDtfsCounter, 1313 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 4677 mSolverCounterSat, 620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1313 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 5297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 620 IncrementalHoareTripleChecker+Valid, 4677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-12-07 01:32:48,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1313 Valid, 720 Invalid, 5297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [620 Valid, 4677 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-12-07 01:32:49,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648371 states. [2021-12-07 01:32:55,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648371 to 631821. [2021-12-07 01:32:55,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631821 states, 631820 states have (on average 1.0262606438542623) internal successors, (648412), 631820 states have internal predecessors, (648412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:32:56,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631821 states to 631821 states and 648412 transitions. [2021-12-07 01:32:56,541 INFO L78 Accepts]: Start accepts. Automaton has 631821 states and 648412 transitions. Word has length 1450 [2021-12-07 01:32:56,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:32:56,542 INFO L470 AbstractCegarLoop]: Abstraction has 631821 states and 648412 transitions. [2021-12-07 01:32:56,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 243.75) internal successors, (975), 3 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:32:56,542 INFO L276 IsEmpty]: Start isEmpty. Operand 631821 states and 648412 transitions. [2021-12-07 01:32:56,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1476 [2021-12-07 01:32:56,676 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:32:56,677 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-07 01:32:56,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-07 01:32:56,677 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:32:56,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:32:56,678 INFO L85 PathProgramCache]: Analyzing trace with hash 303678571, now seen corresponding path program 1 times [2021-12-07 01:32:56,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:32:56,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914330292] [2021-12-07 01:32:56,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:32:56,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:32:56,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:32:57,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2447 backedges. 1716 proven. 0 refuted. 0 times theorem prover too weak. 731 trivial. 0 not checked. [2021-12-07 01:32:57,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:32:57,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914330292] [2021-12-07 01:32:57,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914330292] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:32:57,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:32:57,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:32:57,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619844751] [2021-12-07 01:32:57,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:32:57,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:32:57,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:32:57,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:32:57,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:32:57,084 INFO L87 Difference]: Start difference. First operand 631821 states and 648412 transitions. Second operand has 4 states, 4 states have (on average 236.0) internal successors, (944), 4 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:33:06,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:33:06,187 INFO L93 Difference]: Finished difference Result 1394468 states and 1430970 transitions. [2021-12-07 01:33:06,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:33:06,188 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 236.0) internal successors, (944), 4 states have internal predecessors, (944), 0 states have call successors, (0), 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 1475 [2021-12-07 01:33:06,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:33:07,042 INFO L225 Difference]: With dead ends: 1394468 [2021-12-07 01:33:07,043 INFO L226 Difference]: Without dead ends: 763436 [2021-12-07 01:33:07,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:33:07,218 INFO L933 BasicCegarLoop]: 581 mSDtfsCounter, 1686 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 5912 mSolverCounterSat, 898 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1686 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 6810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 898 IncrementalHoareTripleChecker+Valid, 5912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:33:07,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1686 Valid, 823 Invalid, 6810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [898 Valid, 5912 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-12-07 01:33:07,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763436 states. [2021-12-07 01:33:14,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763436 to 697142. [2021-12-07 01:33:15,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697142 states, 697141 states have (on average 1.0247008854736703) internal successors, (714361), 697141 states have internal predecessors, (714361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:33:16,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697142 states to 697142 states and 714361 transitions. [2021-12-07 01:33:16,272 INFO L78 Accepts]: Start accepts. Automaton has 697142 states and 714361 transitions. Word has length 1475 [2021-12-07 01:33:16,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:33:16,273 INFO L470 AbstractCegarLoop]: Abstraction has 697142 states and 714361 transitions. [2021-12-07 01:33:16,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 236.0) internal successors, (944), 4 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:33:16,273 INFO L276 IsEmpty]: Start isEmpty. Operand 697142 states and 714361 transitions. [2021-12-07 01:33:16,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1489 [2021-12-07 01:33:16,395 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:33:16,396 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-07 01:33:16,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-07 01:33:16,396 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:33:16,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:33:16,397 INFO L85 PathProgramCache]: Analyzing trace with hash -559745925, now seen corresponding path program 1 times [2021-12-07 01:33:16,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:33:16,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64643063] [2021-12-07 01:33:16,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:33:16,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:33:16,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:16,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2643 backedges. 2002 proven. 0 refuted. 0 times theorem prover too weak. 641 trivial. 0 not checked. [2021-12-07 01:33:16,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:33:16,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64643063] [2021-12-07 01:33:16,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64643063] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:33:16,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:33:16,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:33:16,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350216570] [2021-12-07 01:33:16,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:33:16,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:33:16,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:33:16,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:33:16,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:33:16,879 INFO L87 Difference]: Start difference. First operand 697142 states and 714361 transitions. Second operand has 3 states, 3 states have (on average 358.6666666666667) internal successors, (1076), 3 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:33:22,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:33:22,839 INFO L93 Difference]: Finished difference Result 1349414 states and 1382645 transitions. [2021-12-07 01:33:22,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:33:22,840 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 358.6666666666667) internal successors, (1076), 3 states have internal predecessors, (1076), 0 states have call successors, (0), 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 1488 [2021-12-07 01:33:22,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:33:23,778 INFO L225 Difference]: With dead ends: 1349414 [2021-12-07 01:33:23,778 INFO L226 Difference]: Without dead ends: 649912 [2021-12-07 01:33:23,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:33:23,967 INFO L933 BasicCegarLoop]: 1570 mSDtfsCounter, 611 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 2357 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 1686 SdHoareTripleChecker+Invalid, 2596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 2357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-07 01:33:23,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [611 Valid, 1686 Invalid, 2596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 2357 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-07 01:33:24,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649912 states.