./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem17_label06.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6e5634-1549-4f6e-b982-151887d500e6/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6e5634-1549-4f6e-b982-151887d500e6/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6e5634-1549-4f6e-b982-151887d500e6/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6e5634-1549-4f6e-b982-151887d500e6/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem17_label06.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6e5634-1549-4f6e-b982-151887d500e6/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6e5634-1549-4f6e-b982-151887d500e6/bin/uautomizer-DQz5hQGWxF --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 e9764aa77a297d88a5c4424b1d4363c7dc0ea34b016b7ff505243e4a2273d457 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:02:43,792 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:02:43,796 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:02:43,865 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:02:43,866 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:02:43,872 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:02:43,875 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:02:43,879 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:02:43,881 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:02:43,883 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:02:43,884 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:02:43,886 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:02:43,887 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:02:43,888 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:02:43,890 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:02:43,892 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:02:43,893 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:02:43,895 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:02:43,897 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:02:43,900 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:02:43,902 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:02:43,904 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:02:43,906 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:02:43,908 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:02:43,912 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:02:43,913 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:02:43,913 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:02:43,915 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:02:43,916 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:02:43,917 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:02:43,918 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:02:43,919 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:02:43,921 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:02:43,922 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:02:43,924 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:02:43,925 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:02:43,926 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:02:43,926 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:02:43,927 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:02:43,928 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:02:43,931 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:02:43,932 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6e5634-1549-4f6e-b982-151887d500e6/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:02:43,981 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:02:43,981 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:02:43,982 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:02:43,983 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:02:43,991 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:02:43,991 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:02:43,993 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:02:43,993 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:02:43,993 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:02:43,994 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:02:43,995 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:02:43,995 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:02:43,995 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:02:43,996 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:02:43,996 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:02:43,996 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:02:43,996 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:02:43,997 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:02:43,997 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:02:43,997 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:02:43,997 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:02:43,998 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:02:43,998 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:02:43,998 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:02:43,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:02:43,999 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:02:43,999 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:02:43,999 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:02:44,000 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:02:44,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:02:44,002 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:02:44,002 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:02:44,002 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:02:44,002 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:02:44,003 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_bb6e5634-1549-4f6e-b982-151887d500e6/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6e5634-1549-4f6e-b982-151887d500e6/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e9764aa77a297d88a5c4424b1d4363c7dc0ea34b016b7ff505243e4a2273d457 [2021-11-20 06:02:44,407 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:02:44,441 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:02:44,444 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:02:44,446 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:02:44,447 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:02:44,449 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6e5634-1549-4f6e-b982-151887d500e6/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/eca-rers2012/Problem17_label06.c [2021-11-20 06:02:44,527 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6e5634-1549-4f6e-b982-151887d500e6/bin/uautomizer-DQz5hQGWxF/data/4ab05a3ba/c45d15ff4d1d4959b8bd236bcb5ec931/FLAG400930edd [2021-11-20 06:02:45,448 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:02:45,449 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6e5634-1549-4f6e-b982-151887d500e6/sv-benchmarks/c/eca-rers2012/Problem17_label06.c [2021-11-20 06:02:45,490 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6e5634-1549-4f6e-b982-151887d500e6/bin/uautomizer-DQz5hQGWxF/data/4ab05a3ba/c45d15ff4d1d4959b8bd236bcb5ec931/FLAG400930edd [2021-11-20 06:02:45,904 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6e5634-1549-4f6e-b982-151887d500e6/bin/uautomizer-DQz5hQGWxF/data/4ab05a3ba/c45d15ff4d1d4959b8bd236bcb5ec931 [2021-11-20 06:02:45,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:02:45,909 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:02:45,911 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:02:45,911 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:02:45,914 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:02:45,915 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:02:45" (1/1) ... [2021-11-20 06:02:45,917 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3832dc27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:02:45, skipping insertion in model container [2021-11-20 06:02:45,917 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:02:45" (1/1) ... [2021-11-20 06:02:45,925 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:02:46,051 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:02:46,343 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_bb6e5634-1549-4f6e-b982-151887d500e6/sv-benchmarks/c/eca-rers2012/Problem17_label06.c[4782,4795] [2021-11-20 06:02:47,149 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:02:47,159 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:02:47,183 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_bb6e5634-1549-4f6e-b982-151887d500e6/sv-benchmarks/c/eca-rers2012/Problem17_label06.c[4782,4795] [2021-11-20 06:02:47,807 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:02:47,827 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:02:47,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:02:47 WrapperNode [2021-11-20 06:02:47,828 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:02:47,829 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:02:47,829 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:02:47,829 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:02:47,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:02:47" (1/1) ... [2021-11-20 06:02:47,911 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:02:47" (1/1) ... [2021-11-20 06:02:48,255 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-11-20 06:02:48,255 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:02:48,256 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:02:48,256 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:02:48,256 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:02:48,267 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:02:47" (1/1) ... [2021-11-20 06:02:48,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:02:47" (1/1) ... [2021-11-20 06:02:48,308 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:02:47" (1/1) ... [2021-11-20 06:02:48,309 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:02:47" (1/1) ... [2021-11-20 06:02:48,506 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:02:47" (1/1) ... [2021-11-20 06:02:48,542 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:02:47" (1/1) ... [2021-11-20 06:02:48,565 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:02:47" (1/1) ... [2021-11-20 06:02:48,629 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:02:48,630 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:02:48,632 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:02:48,632 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:02:48,633 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:02:47" (1/1) ... [2021-11-20 06:02:48,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:02:48,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6e5634-1549-4f6e-b982-151887d500e6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:02:48,673 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6e5634-1549-4f6e-b982-151887d500e6/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:02:48,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6e5634-1549-4f6e-b982-151887d500e6/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:02:48,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:02:48,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:02:48,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:02:48,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:02:48,826 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:02:48,829 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:02:53,281 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:02:53,305 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:02:53,305 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 06:02:53,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:02:53 BoogieIcfgContainer [2021-11-20 06:02:53,309 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:02:53,311 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:02:53,311 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:02:53,316 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:02:53,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:02:45" (1/3) ... [2021-11-20 06:02:53,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c887590 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:02:53, skipping insertion in model container [2021-11-20 06:02:53,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:02:47" (2/3) ... [2021-11-20 06:02:53,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c887590 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:02:53, skipping insertion in model container [2021-11-20 06:02:53,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:02:53" (3/3) ... [2021-11-20 06:02:53,319 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label06.c [2021-11-20 06:02:53,331 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:02:53,332 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:02:53,391 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:02:53,399 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 06:02:53,399 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:02:53,431 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:53,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-20 06:02:53,439 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:02:53,439 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:02:53,440 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:02:53,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:02:53,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1843609039, now seen corresponding path program 1 times [2021-11-20 06:02:53,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:02:53,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275658796] [2021-11-20 06:02:53,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:02:53,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:02:53,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:53,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:02:53,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:02:53,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275658796] [2021-11-20 06:02:53,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275658796] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:02:53,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:02:53,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:02:53,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949423645] [2021-11-20 06:02:53,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:02:53,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:02:53,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:02:53,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:02:53,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:02:53,753 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 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 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:57,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:02:57,944 INFO L93 Difference]: Finished difference Result 1667 states and 3061 transitions. [2021-11-20 06:02:57,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:02:57,954 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 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 31 [2021-11-20 06:02:57,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:02:57,987 INFO L225 Difference]: With dead ends: 1667 [2021-11-20 06:02:57,988 INFO L226 Difference]: Without dead ends: 998 [2021-11-20 06:02:57,998 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 [2021-11-20 06:02:58,005 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 514 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1566 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 1962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 1566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:02:58,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [514 Valid, 276 Invalid, 1962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 1566 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-20 06:02:58,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2021-11-20 06:02:58,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 982. [2021-11-20 06:02:58,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 1.707441386340469) internal successors, (1675), 981 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:58,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1675 transitions. [2021-11-20 06:02:58,123 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1675 transitions. Word has length 31 [2021-11-20 06:02:58,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:02:58,124 INFO L470 AbstractCegarLoop]: Abstraction has 982 states and 1675 transitions. [2021-11-20 06:02:58,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:58,125 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1675 transitions. [2021-11-20 06:02:58,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-20 06:02:58,129 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:02:58,130 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:02:58,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:02:58,131 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:02:58,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:02:58,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1080324021, now seen corresponding path program 1 times [2021-11-20 06:02:58,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:02:58,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953217263] [2021-11-20 06:02:58,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:02:58,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:02:58,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:58,293 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:02:58,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:02:58,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953217263] [2021-11-20 06:02:58,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953217263] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:02:58,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:02:58,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:02:58,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444292544] [2021-11-20 06:02:58,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:02:58,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:02:58,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:02:58,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:02:58,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:02:58,298 INFO L87 Difference]: Start difference. First operand 982 states and 1675 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:01,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:03:01,559 INFO L93 Difference]: Finished difference Result 2841 states and 4881 transitions. [2021-11-20 06:03:01,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:03:01,559 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2021-11-20 06:03:01,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:03:01,573 INFO L225 Difference]: With dead ends: 2841 [2021-11-20 06:03:01,573 INFO L226 Difference]: Without dead ends: 1861 [2021-11-20 06:03:01,583 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 [2021-11-20 06:03:01,585 INFO L933 BasicCegarLoop]: 423 mSDtfsCounter, 407 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1340 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:03:01,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 496 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1340 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-20 06:03:01,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2021-11-20 06:03:01,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1857. [2021-11-20 06:03:01,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1856 states have (on average 1.4547413793103448) internal successors, (2700), 1856 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:01,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 2700 transitions. [2021-11-20 06:03:01,681 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 2700 transitions. Word has length 96 [2021-11-20 06:03:01,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:03:01,685 INFO L470 AbstractCegarLoop]: Abstraction has 1857 states and 2700 transitions. [2021-11-20 06:03:01,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:01,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 2700 transitions. [2021-11-20 06:03:01,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-20 06:03:01,700 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:03:01,702 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 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] [2021-11-20 06:03:01,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:03:01,704 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:03:01,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:03:01,706 INFO L85 PathProgramCache]: Analyzing trace with hash 446171936, now seen corresponding path program 1 times [2021-11-20 06:03:01,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:03:01,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152271483] [2021-11-20 06:03:01,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:03:01,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:03:01,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:02,035 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:03:02,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:03:02,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152271483] [2021-11-20 06:03:02,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152271483] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:03:02,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:03:02,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:03:02,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27359422] [2021-11-20 06:03:02,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:03:02,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:03:02,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:03:02,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:03:02,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:03:02,045 INFO L87 Difference]: Start difference. First operand 1857 states and 2700 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:05,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:03:05,655 INFO L93 Difference]: Finished difference Result 4591 states and 6640 transitions. [2021-11-20 06:03:05,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:03:05,656 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-11-20 06:03:05,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:03:05,677 INFO L225 Difference]: With dead ends: 4591 [2021-11-20 06:03:05,677 INFO L226 Difference]: Without dead ends: 2736 [2021-11-20 06:03:05,681 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 [2021-11-20 06:03:05,683 INFO L933 BasicCegarLoop]: 475 mSDtfsCounter, 352 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1665 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 1763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:03:05,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 537 Invalid, 1763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1665 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-20 06:03:05,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2021-11-20 06:03:05,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2716. [2021-11-20 06:03:05,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2716 states, 2715 states have (on average 1.390791896869245) internal successors, (3776), 2715 states have internal predecessors, (3776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:05,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2716 states to 2716 states and 3776 transitions. [2021-11-20 06:03:05,779 INFO L78 Accepts]: Start accepts. Automaton has 2716 states and 3776 transitions. Word has length 136 [2021-11-20 06:03:05,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:03:05,780 INFO L470 AbstractCegarLoop]: Abstraction has 2716 states and 3776 transitions. [2021-11-20 06:03:05,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:05,781 INFO L276 IsEmpty]: Start isEmpty. Operand 2716 states and 3776 transitions. [2021-11-20 06:03:05,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-20 06:03:05,784 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:03:05,784 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 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] [2021-11-20 06:03:05,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 06:03:05,785 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:03:05,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:03:05,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1180835985, now seen corresponding path program 1 times [2021-11-20 06:03:05,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:03:05,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367297031] [2021-11-20 06:03:05,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:03:05,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:03:05,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:05,914 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:03:05,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:03:05,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367297031] [2021-11-20 06:03:05,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367297031] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:03:05,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:03:05,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:03:05,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520395801] [2021-11-20 06:03:05,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:03:05,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:03:05,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:03:05,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:03:05,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:03:05,919 INFO L87 Difference]: Start difference. First operand 2716 states and 3776 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 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) [2021-11-20 06:03:08,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:03:08,298 INFO L93 Difference]: Finished difference Result 6709 states and 9429 transitions. [2021-11-20 06:03:08,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:03:08,299 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 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 142 [2021-11-20 06:03:08,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:03:08,327 INFO L225 Difference]: With dead ends: 6709 [2021-11-20 06:03:08,328 INFO L226 Difference]: Without dead ends: 3995 [2021-11-20 06:03:08,333 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 [2021-11-20 06:03:08,335 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 347 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:03:08,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:03:08,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3995 states. [2021-11-20 06:03:08,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3995 to 3142. [2021-11-20 06:03:08,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3142 states, 3141 states have (on average 1.274434893346068) internal successors, (4003), 3141 states have internal predecessors, (4003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:08,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3142 states to 3142 states and 4003 transitions. [2021-11-20 06:03:08,437 INFO L78 Accepts]: Start accepts. Automaton has 3142 states and 4003 transitions. Word has length 142 [2021-11-20 06:03:08,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:03:08,438 INFO L470 AbstractCegarLoop]: Abstraction has 3142 states and 4003 transitions. [2021-11-20 06:03:08,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 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) [2021-11-20 06:03:08,439 INFO L276 IsEmpty]: Start isEmpty. Operand 3142 states and 4003 transitions. [2021-11-20 06:03:08,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-20 06:03:08,442 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:03:08,443 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:03:08,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 06:03:08,443 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:03:08,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:03:08,444 INFO L85 PathProgramCache]: Analyzing trace with hash -2071979068, now seen corresponding path program 1 times [2021-11-20 06:03:08,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:03:08,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431730728] [2021-11-20 06:03:08,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:03:08,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:03:08,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:08,635 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:03:08,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:03:08,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431730728] [2021-11-20 06:03:08,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431730728] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:03:08,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:03:08,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:03:08,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840356154] [2021-11-20 06:03:08,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:03:08,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:03:08,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:03:08,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:03:08,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:03:08,643 INFO L87 Difference]: Start difference. First operand 3142 states and 4003 transitions. Second operand has 5 states, 5 states have (on average 35.8) internal successors, (179), 5 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:12,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:03:12,524 INFO L93 Difference]: Finished difference Result 8019 states and 10522 transitions. [2021-11-20 06:03:12,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:03:12,525 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 5 states have internal predecessors, (179), 0 states have call successors, (0), 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 179 [2021-11-20 06:03:12,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:03:12,556 INFO L225 Difference]: With dead ends: 8019 [2021-11-20 06:03:12,556 INFO L226 Difference]: Without dead ends: 4879 [2021-11-20 06:03:12,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:03:12,563 INFO L933 BasicCegarLoop]: 756 mSDtfsCounter, 1096 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 1990 mSolverCounterSat, 813 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1096 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 2803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 813 IncrementalHoareTripleChecker+Valid, 1990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:03:12,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1096 Valid, 881 Invalid, 2803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [813 Valid, 1990 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-11-20 06:03:12,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4879 states. [2021-11-20 06:03:12,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4879 to 4852. [2021-11-20 06:03:12,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4852 states, 4851 states have (on average 1.2665429808286952) internal successors, (6144), 4851 states have internal predecessors, (6144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:12,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4852 states to 4852 states and 6144 transitions. [2021-11-20 06:03:12,701 INFO L78 Accepts]: Start accepts. Automaton has 4852 states and 6144 transitions. Word has length 179 [2021-11-20 06:03:12,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:03:12,702 INFO L470 AbstractCegarLoop]: Abstraction has 4852 states and 6144 transitions. [2021-11-20 06:03:12,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 5 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:12,703 INFO L276 IsEmpty]: Start isEmpty. Operand 4852 states and 6144 transitions. [2021-11-20 06:03:12,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-20 06:03:12,706 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:03:12,706 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:03:12,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 06:03:12,707 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:03:12,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:03:12,708 INFO L85 PathProgramCache]: Analyzing trace with hash 851513907, now seen corresponding path program 1 times [2021-11-20 06:03:12,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:03:12,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970336834] [2021-11-20 06:03:12,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:03:12,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:03:12,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:12,828 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-20 06:03:12,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:03:12,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970336834] [2021-11-20 06:03:12,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970336834] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:03:12,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:03:12,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:03:12,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361491721] [2021-11-20 06:03:12,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:03:12,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:03:12,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:03:12,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:03:12,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:03:12,832 INFO L87 Difference]: Start difference. First operand 4852 states and 6144 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:15,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:03:15,820 INFO L93 Difference]: Finished difference Result 12249 states and 15825 transitions. [2021-11-20 06:03:15,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:03:15,821 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 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 185 [2021-11-20 06:03:15,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:03:15,862 INFO L225 Difference]: With dead ends: 12249 [2021-11-20 06:03:15,862 INFO L226 Difference]: Without dead ends: 7399 [2021-11-20 06:03:15,869 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 [2021-11-20 06:03:15,870 INFO L933 BasicCegarLoop]: 481 mSDtfsCounter, 417 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1339 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 1695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 1339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:03:15,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 545 Invalid, 1695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 1339 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-20 06:03:15,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7399 states. [2021-11-20 06:03:15,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7399 to 4826. [2021-11-20 06:03:16,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4825 states have (on average 1.2652849740932643) internal successors, (6105), 4825 states have internal predecessors, (6105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:16,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 6105 transitions. [2021-11-20 06:03:16,019 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 6105 transitions. Word has length 185 [2021-11-20 06:03:16,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:03:16,020 INFO L470 AbstractCegarLoop]: Abstraction has 4826 states and 6105 transitions. [2021-11-20 06:03:16,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:16,021 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 6105 transitions. [2021-11-20 06:03:16,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-11-20 06:03:16,025 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:03:16,025 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:03:16,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 06:03:16,026 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:03:16,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:03:16,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1071805537, now seen corresponding path program 1 times [2021-11-20 06:03:16,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:03:16,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835415315] [2021-11-20 06:03:16,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:03:16,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:03:16,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:16,178 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 06:03:16,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:03:16,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835415315] [2021-11-20 06:03:16,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835415315] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:03:16,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:03:16,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:03:16,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437233147] [2021-11-20 06:03:16,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:03:16,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:03:16,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:03:16,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:03:16,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:03:16,182 INFO L87 Difference]: Start difference. First operand 4826 states and 6105 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:19,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:03:19,264 INFO L93 Difference]: Finished difference Result 13481 states and 17131 transitions. [2021-11-20 06:03:19,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:03:19,264 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 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 198 [2021-11-20 06:03:19,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:03:19,307 INFO L225 Difference]: With dead ends: 13481 [2021-11-20 06:03:19,307 INFO L226 Difference]: Without dead ends: 8657 [2021-11-20 06:03:19,314 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 [2021-11-20 06:03:19,316 INFO L933 BasicCegarLoop]: 425 mSDtfsCounter, 453 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 1748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:03:19,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 483 Invalid, 1748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 1420 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-20 06:03:19,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8657 states. [2021-11-20 06:03:19,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8657 to 7378. [2021-11-20 06:03:19,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7378 states, 7377 states have (on average 1.2479327639962043) internal successors, (9206), 7377 states have internal predecessors, (9206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:19,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7378 states to 7378 states and 9206 transitions. [2021-11-20 06:03:19,579 INFO L78 Accepts]: Start accepts. Automaton has 7378 states and 9206 transitions. Word has length 198 [2021-11-20 06:03:19,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:03:19,580 INFO L470 AbstractCegarLoop]: Abstraction has 7378 states and 9206 transitions. [2021-11-20 06:03:19,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:19,600 INFO L276 IsEmpty]: Start isEmpty. Operand 7378 states and 9206 transitions. [2021-11-20 06:03:19,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-11-20 06:03:19,605 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:03:19,606 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:03:19,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 06:03:19,606 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:03:19,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:03:19,609 INFO L85 PathProgramCache]: Analyzing trace with hash 830636259, now seen corresponding path program 1 times [2021-11-20 06:03:19,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:03:19,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348626748] [2021-11-20 06:03:19,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:03:19,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:03:19,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:19,823 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 06:03:19,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:03:19,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348626748] [2021-11-20 06:03:19,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348626748] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:03:19,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:03:19,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:03:19,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515244109] [2021-11-20 06:03:19,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:03:19,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:03:19,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:03:19,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:03:19,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:03:19,827 INFO L87 Difference]: Start difference. First operand 7378 states and 9206 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:22,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:03:22,969 INFO L93 Difference]: Finished difference Result 18607 states and 23435 transitions. [2021-11-20 06:03:22,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:03:22,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 247 [2021-11-20 06:03:22,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:03:22,996 INFO L225 Difference]: With dead ends: 18607 [2021-11-20 06:03:22,996 INFO L226 Difference]: Without dead ends: 10379 [2021-11-20 06:03:23,007 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 [2021-11-20 06:03:23,008 INFO L933 BasicCegarLoop]: 945 mSDtfsCounter, 469 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1481 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 1729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 1481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:03:23,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [469 Valid, 1020 Invalid, 1729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 1481 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-20 06:03:23,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10379 states. [2021-11-20 06:03:23,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10379 to 10371. [2021-11-20 06:03:23,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10371 states, 10370 states have (on average 1.2060752169720348) internal successors, (12507), 10370 states have internal predecessors, (12507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:23,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10371 states to 10371 states and 12507 transitions. [2021-11-20 06:03:23,207 INFO L78 Accepts]: Start accepts. Automaton has 10371 states and 12507 transitions. Word has length 247 [2021-11-20 06:03:23,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:03:23,208 INFO L470 AbstractCegarLoop]: Abstraction has 10371 states and 12507 transitions. [2021-11-20 06:03:23,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:23,208 INFO L276 IsEmpty]: Start isEmpty. Operand 10371 states and 12507 transitions. [2021-11-20 06:03:23,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-20 06:03:23,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:03:23,215 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:03:23,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 06:03:23,218 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:03:23,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:03:23,219 INFO L85 PathProgramCache]: Analyzing trace with hash 571478886, now seen corresponding path program 1 times [2021-11-20 06:03:23,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:03:23,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847842757] [2021-11-20 06:03:23,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:03:23,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:03:23,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:23,536 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 196 proven. 70 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-20 06:03:23,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:03:23,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847842757] [2021-11-20 06:03:23,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847842757] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:03:23,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29117921] [2021-11-20 06:03:23,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:03:23,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:03:23,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6e5634-1549-4f6e-b982-151887d500e6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:03:23,543 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6e5634-1549-4f6e-b982-151887d500e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:03:23,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6e5634-1549-4f6e-b982-151887d500e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:03:23,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:23,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:03:23,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:03:25,022 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 196 proven. 70 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-20 06:03:25,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:03:25,880 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 266 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-20 06:03:25,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29117921] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 06:03:25,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:03:25,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2021-11-20 06:03:25,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653645033] [2021-11-20 06:03:25,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:03:25,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:03:25,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:03:25,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:03:25,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:03:25,884 INFO L87 Difference]: Start difference. First operand 10371 states and 12507 transitions. Second operand has 4 states, 4 states have (on average 56.75) 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) [2021-11-20 06:03:31,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:03:31,124 INFO L93 Difference]: Finished difference Result 32691 states and 39751 transitions. [2021-11-20 06:03:31,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:03:31,125 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.75) 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 255 [2021-11-20 06:03:31,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:03:31,174 INFO L225 Difference]: With dead ends: 32691 [2021-11-20 06:03:31,174 INFO L226 Difference]: Without dead ends: 21461 [2021-11-20 06:03:31,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 505 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:03:31,187 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 1139 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 2293 mSolverCounterSat, 1421 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1139 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 3714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1421 IncrementalHoareTripleChecker+Valid, 2293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:03:31,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1139 Valid, 143 Invalid, 3714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1421 Valid, 2293 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-11-20 06:03:31,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21461 states. [2021-11-20 06:03:31,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21461 to 21459. [2021-11-20 06:03:31,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21459 states, 21458 states have (on average 1.1587752819461272) internal successors, (24865), 21458 states have internal predecessors, (24865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:31,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21459 states to 21459 states and 24865 transitions. [2021-11-20 06:03:31,550 INFO L78 Accepts]: Start accepts. Automaton has 21459 states and 24865 transitions. Word has length 255 [2021-11-20 06:03:31,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:03:31,551 INFO L470 AbstractCegarLoop]: Abstraction has 21459 states and 24865 transitions. [2021-11-20 06:03:31,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.75) 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) [2021-11-20 06:03:31,552 INFO L276 IsEmpty]: Start isEmpty. Operand 21459 states and 24865 transitions. [2021-11-20 06:03:31,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-11-20 06:03:31,559 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:03:31,559 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:03:31,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6e5634-1549-4f6e-b982-151887d500e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:03:31,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6e5634-1549-4f6e-b982-151887d500e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:03:31,776 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:03:31,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:03:31,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1010683278, now seen corresponding path program 1 times [2021-11-20 06:03:31,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:03:31,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622971934] [2021-11-20 06:03:31,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:03:31,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:03:31,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:31,932 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 229 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-20 06:03:31,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:03:31,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622971934] [2021-11-20 06:03:31,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622971934] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:03:31,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:03:31,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:03:31,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833484477] [2021-11-20 06:03:31,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:03:31,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:03:31,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:03:31,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:03:31,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:03:31,936 INFO L87 Difference]: Start difference. First operand 21459 states and 24865 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:34,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:03:34,431 INFO L93 Difference]: Finished difference Result 47592 states and 55279 transitions. [2021-11-20 06:03:34,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:03:34,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 268 [2021-11-20 06:03:34,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:03:34,496 INFO L225 Difference]: With dead ends: 47592 [2021-11-20 06:03:34,496 INFO L226 Difference]: Without dead ends: 26135 [2021-11-20 06:03:34,511 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 [2021-11-20 06:03:34,512 INFO L933 BasicCegarLoop]: 792 mSDtfsCounter, 373 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 1408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:03:34,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 858 Invalid, 1408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1202 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-20 06:03:34,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26135 states. [2021-11-20 06:03:34,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26135 to 25710. [2021-11-20 06:03:34,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25710 states, 25709 states have (on average 1.1431016375588314) internal successors, (29388), 25709 states have internal predecessors, (29388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:34,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25710 states to 25710 states and 29388 transitions. [2021-11-20 06:03:34,893 INFO L78 Accepts]: Start accepts. Automaton has 25710 states and 29388 transitions. Word has length 268 [2021-11-20 06:03:34,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:03:34,894 INFO L470 AbstractCegarLoop]: Abstraction has 25710 states and 29388 transitions. [2021-11-20 06:03:34,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:34,895 INFO L276 IsEmpty]: Start isEmpty. Operand 25710 states and 29388 transitions. [2021-11-20 06:03:34,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2021-11-20 06:03:34,903 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:03:34,904 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 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] [2021-11-20 06:03:34,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 06:03:34,905 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:03:34,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:03:34,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1351221799, now seen corresponding path program 1 times [2021-11-20 06:03:34,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:03:34,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392669899] [2021-11-20 06:03:34,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:03:34,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:03:34,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:35,111 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 229 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 06:03:35,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:03:35,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392669899] [2021-11-20 06:03:35,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392669899] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:03:35,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:03:35,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:03:35,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159235463] [2021-11-20 06:03:35,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:03:35,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:03:35,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:03:35,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:03:35,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:03:35,118 INFO L87 Difference]: Start difference. First operand 25710 states and 29388 transitions. Second operand has 4 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:39,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:03:39,683 INFO L93 Difference]: Finished difference Result 67190 states and 77164 transitions. [2021-11-20 06:03:39,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:03:39,690 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 0 states have call successors, (0), 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 291 [2021-11-20 06:03:39,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:03:39,755 INFO L225 Difference]: With dead ends: 67190 [2021-11-20 06:03:39,755 INFO L226 Difference]: Without dead ends: 38068 [2021-11-20 06:03:39,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:03:39,775 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 880 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 2590 mSolverCounterSat, 505 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 880 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 3095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 505 IncrementalHoareTripleChecker+Valid, 2590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:03:39,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [880 Valid, 317 Invalid, 3095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [505 Valid, 2590 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-11-20 06:03:39,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38068 states. [2021-11-20 06:03:40,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38068 to 34625. [2021-11-20 06:03:40,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34625 states, 34624 states have (on average 1.1460547597042514) internal successors, (39681), 34624 states have internal predecessors, (39681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:40,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34625 states to 34625 states and 39681 transitions. [2021-11-20 06:03:40,660 INFO L78 Accepts]: Start accepts. Automaton has 34625 states and 39681 transitions. Word has length 291 [2021-11-20 06:03:40,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:03:40,661 INFO L470 AbstractCegarLoop]: Abstraction has 34625 states and 39681 transitions. [2021-11-20 06:03:40,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:40,662 INFO L276 IsEmpty]: Start isEmpty. Operand 34625 states and 39681 transitions. [2021-11-20 06:03:40,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-11-20 06:03:40,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:03:40,673 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 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] [2021-11-20 06:03:40,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 06:03:40,674 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:03:40,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:03:40,675 INFO L85 PathProgramCache]: Analyzing trace with hash 950600156, now seen corresponding path program 1 times [2021-11-20 06:03:40,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:03:40,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347101568] [2021-11-20 06:03:40,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:03:40,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:03:40,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:40,866 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 282 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-20 06:03:40,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:03:40,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347101568] [2021-11-20 06:03:40,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347101568] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:03:40,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:03:40,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:03:40,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091781446] [2021-11-20 06:03:40,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:03:40,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:03:40,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:03:40,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:03:40,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:03:40,870 INFO L87 Difference]: Start difference. First operand 34625 states and 39681 transitions. Second operand has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:43,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:03:43,527 INFO L93 Difference]: Finished difference Result 83321 states and 95565 transitions. [2021-11-20 06:03:43,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:03:43,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 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 306 [2021-11-20 06:03:43,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:03:43,622 INFO L225 Difference]: With dead ends: 83321 [2021-11-20 06:03:43,623 INFO L226 Difference]: Without dead ends: 45721 [2021-11-20 06:03:43,639 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 [2021-11-20 06:03:43,640 INFO L933 BasicCegarLoop]: 732 mSDtfsCounter, 362 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 1448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:03:43,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 802 Invalid, 1448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 1212 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:03:43,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45721 states. [2021-11-20 06:03:44,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45721 to 45286. [2021-11-20 06:03:44,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45286 states, 45285 states have (on average 1.1171027934194546) internal successors, (50588), 45285 states have internal predecessors, (50588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:44,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45286 states to 45286 states and 50588 transitions. [2021-11-20 06:03:44,606 INFO L78 Accepts]: Start accepts. Automaton has 45286 states and 50588 transitions. Word has length 306 [2021-11-20 06:03:44,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:03:44,607 INFO L470 AbstractCegarLoop]: Abstraction has 45286 states and 50588 transitions. [2021-11-20 06:03:44,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:44,607 INFO L276 IsEmpty]: Start isEmpty. Operand 45286 states and 50588 transitions. [2021-11-20 06:03:44,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2021-11-20 06:03:44,614 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:03:44,615 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:03:44,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 06:03:44,615 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:03:44,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:03:44,616 INFO L85 PathProgramCache]: Analyzing trace with hash -604991863, now seen corresponding path program 1 times [2021-11-20 06:03:44,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:03:44,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327821357] [2021-11-20 06:03:44,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:03:44,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:03:44,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:44,963 INFO L134 CoverageAnalysis]: Checked inductivity of 538 backedges. 295 proven. 214 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-20 06:03:44,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:03:44,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327821357] [2021-11-20 06:03:44,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327821357] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:03:44,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421779200] [2021-11-20 06:03:44,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:03:44,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:03:44,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6e5634-1549-4f6e-b982-151887d500e6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:03:44,965 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6e5634-1549-4f6e-b982-151887d500e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:03:44,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6e5634-1549-4f6e-b982-151887d500e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:03:45,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:45,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:03:45,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:03:46,177 INFO L134 CoverageAnalysis]: Checked inductivity of 538 backedges. 337 proven. 73 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-20 06:03:46,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:03:47,157 INFO L134 CoverageAnalysis]: Checked inductivity of 538 backedges. 410 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-20 06:03:47,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421779200] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 06:03:47,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:03:47,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 6 [2021-11-20 06:03:47,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009595579] [2021-11-20 06:03:47,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:03:47,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:03:47,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:03:47,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:03:47,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:03:47,160 INFO L87 Difference]: Start difference. First operand 45286 states and 50588 transitions. Second operand has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:51,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:03:51,843 INFO L93 Difference]: Finished difference Result 109317 states and 122120 transitions. [2021-11-20 06:03:51,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:03:51,844 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 329 [2021-11-20 06:03:51,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:03:51,935 INFO L225 Difference]: With dead ends: 109317 [2021-11-20 06:03:51,935 INFO L226 Difference]: Without dead ends: 64033 [2021-11-20 06:03:51,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 660 GetRequests, 653 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:03:51,980 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 842 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 2308 mSolverCounterSat, 496 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 2804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 2308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:03:51,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [842 Valid, 188 Invalid, 2804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [496 Valid, 2308 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-11-20 06:03:52,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64033 states. [2021-11-20 06:03:53,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64033 to 60203. [2021-11-20 06:03:53,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60203 states, 60202 states have (on average 1.1185176572206903) internal successors, (67337), 60202 states have internal predecessors, (67337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:53,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60203 states to 60203 states and 67337 transitions. [2021-11-20 06:03:53,195 INFO L78 Accepts]: Start accepts. Automaton has 60203 states and 67337 transitions. Word has length 329 [2021-11-20 06:03:53,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:03:53,197 INFO L470 AbstractCegarLoop]: Abstraction has 60203 states and 67337 transitions. [2021-11-20 06:03:53,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:53,198 INFO L276 IsEmpty]: Start isEmpty. Operand 60203 states and 67337 transitions. [2021-11-20 06:03:53,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2021-11-20 06:03:53,208 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:03:53,209 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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, 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] [2021-11-20 06:03:53,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6e5634-1549-4f6e-b982-151887d500e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:03:53,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6e5634-1549-4f6e-b982-151887d500e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 06:03:53,425 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:03:53,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:03:53,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1311562389, now seen corresponding path program 1 times [2021-11-20 06:03:53,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:03:53,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683746600] [2021-11-20 06:03:53,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:03:53,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:03:53,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:53,893 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 326 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-11-20 06:03:53,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:03:53,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683746600] [2021-11-20 06:03:53,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683746600] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:03:53,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:03:53,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:03:53,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644869007] [2021-11-20 06:03:53,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:03:53,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:03:53,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:03:53,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:03:53,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:03:53,897 INFO L87 Difference]: Start difference. First operand 60203 states and 67337 transitions. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:56,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:03:56,545 INFO L93 Difference]: Finished difference Result 134019 states and 150109 transitions. [2021-11-20 06:03:56,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:03:56,546 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 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 359 [2021-11-20 06:03:56,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:03:56,658 INFO L225 Difference]: With dead ends: 134019 [2021-11-20 06:03:56,659 INFO L226 Difference]: Without dead ends: 70839 [2021-11-20 06:03:56,685 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 [2021-11-20 06:03:56,686 INFO L933 BasicCegarLoop]: 741 mSDtfsCounter, 390 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 1422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:03:56,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 799 Invalid, 1422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 1178 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-20 06:03:56,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70839 states. [2021-11-20 06:03:57,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70839 to 59739. [2021-11-20 06:03:57,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59739 states, 59738 states have (on average 1.1137634336603168) internal successors, (66534), 59738 states have internal predecessors, (66534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:57,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59739 states to 59739 states and 66534 transitions. [2021-11-20 06:03:57,796 INFO L78 Accepts]: Start accepts. Automaton has 59739 states and 66534 transitions. Word has length 359 [2021-11-20 06:03:57,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:03:57,797 INFO L470 AbstractCegarLoop]: Abstraction has 59739 states and 66534 transitions. [2021-11-20 06:03:57,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:57,797 INFO L276 IsEmpty]: Start isEmpty. Operand 59739 states and 66534 transitions. [2021-11-20 06:03:57,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2021-11-20 06:03:57,809 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:03:57,810 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-11-20 06:03:57,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 06:03:57,811 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:03:57,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:03:57,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1352739045, now seen corresponding path program 1 times [2021-11-20 06:03:57,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:03:57,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690777784] [2021-11-20 06:03:57,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:03:57,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:03:57,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:57,997 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 512 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-20 06:03:57,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:03:57,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690777784] [2021-11-20 06:03:57,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690777784] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:03:57,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:03:57,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:03:57,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575032340] [2021-11-20 06:03:57,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:03:58,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:03:58,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:03:58,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:03:58,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:03:58,001 INFO L87 Difference]: Start difference. First operand 59739 states and 66534 transitions. Second operand has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:01,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:04:01,028 INFO L93 Difference]: Finished difference Result 130129 states and 144808 transitions. [2021-11-20 06:04:01,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:04:01,029 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 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 400 [2021-11-20 06:04:01,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:04:01,117 INFO L225 Difference]: With dead ends: 130129 [2021-11-20 06:04:01,117 INFO L226 Difference]: Without dead ends: 69961 [2021-11-20 06:04:01,141 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 [2021-11-20 06:04:01,142 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 422 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 1458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:04:01,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 282 Invalid, 1458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 1232 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 06:04:01,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69961 states. [2021-11-20 06:04:02,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69961 to 66125. [2021-11-20 06:04:02,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66125 states, 66124 states have (on average 1.1111245538684895) internal successors, (73472), 66124 states have internal predecessors, (73472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:02,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66125 states to 66125 states and 73472 transitions. [2021-11-20 06:04:02,298 INFO L78 Accepts]: Start accepts. Automaton has 66125 states and 73472 transitions. Word has length 400 [2021-11-20 06:04:02,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:04:02,299 INFO L470 AbstractCegarLoop]: Abstraction has 66125 states and 73472 transitions. [2021-11-20 06:04:02,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:02,299 INFO L276 IsEmpty]: Start isEmpty. Operand 66125 states and 73472 transitions. [2021-11-20 06:04:02,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2021-11-20 06:04:02,314 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:04:02,315 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:04:02,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 06:04:02,315 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:04:02,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:04:02,316 INFO L85 PathProgramCache]: Analyzing trace with hash 2097456585, now seen corresponding path program 1 times [2021-11-20 06:04:02,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:04:02,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660416461] [2021-11-20 06:04:02,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:04:02,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:04:02,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:02,984 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 301 proven. 29 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-11-20 06:04:02,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:04:02,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660416461] [2021-11-20 06:04:02,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660416461] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:04:02,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399809840] [2021-11-20 06:04:02,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:04:02,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:04:02,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6e5634-1549-4f6e-b982-151887d500e6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:04:02,987 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6e5634-1549-4f6e-b982-151887d500e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:04:02,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6e5634-1549-4f6e-b982-151887d500e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:04:03,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:03,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:04:03,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:04:04,655 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 387 proven. 82 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-11-20 06:04:04,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:04:07,044 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 387 proven. 82 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-11-20 06:04:07,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399809840] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:04:07,045 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:04:07,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2021-11-20 06:04:07,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565708108] [2021-11-20 06:04:07,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:04:07,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:04:07,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:04:07,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:04:07,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:04:07,051 INFO L87 Difference]: Start difference. First operand 66125 states and 73472 transitions. Second operand has 9 states, 9 states have (on average 80.66666666666667) internal successors, (726), 9 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:22,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:04:22,207 INFO L93 Difference]: Finished difference Result 183771 states and 203000 transitions. [2021-11-20 06:04:22,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 06:04:22,208 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 80.66666666666667) internal successors, (726), 9 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 411 [2021-11-20 06:04:22,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:04:22,356 INFO L225 Difference]: With dead ends: 183771 [2021-11-20 06:04:22,356 INFO L226 Difference]: Without dead ends: 111259 [2021-11-20 06:04:22,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 842 GetRequests, 826 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:04:22,384 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 6155 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 11619 mSolverCounterSat, 1687 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6155 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 13306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1687 IncrementalHoareTripleChecker+Valid, 11619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:04:22,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6155 Valid, 437 Invalid, 13306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1687 Valid, 11619 Invalid, 0 Unknown, 0 Unchecked, 13.9s Time] [2021-11-20 06:04:22,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111259 states. [2021-11-20 06:04:23,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111259 to 88617. [2021-11-20 06:04:23,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88617 states, 88616 states have (on average 1.0832693870181458) internal successors, (95995), 88616 states have internal predecessors, (95995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:24,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88617 states to 88617 states and 95995 transitions. [2021-11-20 06:04:24,130 INFO L78 Accepts]: Start accepts. Automaton has 88617 states and 95995 transitions. Word has length 411 [2021-11-20 06:04:24,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:04:24,131 INFO L470 AbstractCegarLoop]: Abstraction has 88617 states and 95995 transitions. [2021-11-20 06:04:24,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 80.66666666666667) internal successors, (726), 9 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:24,131 INFO L276 IsEmpty]: Start isEmpty. Operand 88617 states and 95995 transitions. [2021-11-20 06:04:24,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2021-11-20 06:04:24,146 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:04:24,147 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-20 06:04:24,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6e5634-1549-4f6e-b982-151887d500e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:04:24,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6e5634-1549-4f6e-b982-151887d500e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 06:04:24,350 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:04:24,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:04:24,351 INFO L85 PathProgramCache]: Analyzing trace with hash 300395610, now seen corresponding path program 1 times [2021-11-20 06:04:24,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:04:24,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435014197] [2021-11-20 06:04:24,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:04:24,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:04:24,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:24,637 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2021-11-20 06:04:24,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:04:24,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435014197] [2021-11-20 06:04:24,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435014197] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:04:24,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:04:24,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:04:24,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297143305] [2021-11-20 06:04:24,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:04:24,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:04:24,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:04:24,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:04:24,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:04:24,642 INFO L87 Difference]: Start difference. First operand 88617 states and 95995 transitions. Second operand has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:27,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:04:27,969 INFO L93 Difference]: Finished difference Result 174674 states and 189214 transitions. [2021-11-20 06:04:27,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:04:27,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 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 497 [2021-11-20 06:04:27,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:04:28,081 INFO L225 Difference]: With dead ends: 174674 [2021-11-20 06:04:28,081 INFO L226 Difference]: Without dead ends: 86059 [2021-11-20 06:04:28,118 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 [2021-11-20 06:04:28,119 INFO L933 BasicCegarLoop]: 636 mSDtfsCounter, 465 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 1257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:04:28,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [465 Valid, 692 Invalid, 1257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1137 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:04:28,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86059 states. [2021-11-20 06:04:29,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86059 to 84782. [2021-11-20 06:04:29,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84782 states, 84781 states have (on average 1.0677746193132895) internal successors, (90527), 84781 states have internal predecessors, (90527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:29,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84782 states to 84782 states and 90527 transitions. [2021-11-20 06:04:29,593 INFO L78 Accepts]: Start accepts. Automaton has 84782 states and 90527 transitions. Word has length 497 [2021-11-20 06:04:29,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:04:29,594 INFO L470 AbstractCegarLoop]: Abstraction has 84782 states and 90527 transitions. [2021-11-20 06:04:29,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:29,594 INFO L276 IsEmpty]: Start isEmpty. Operand 84782 states and 90527 transitions. [2021-11-20 06:04:29,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 572 [2021-11-20 06:04:29,613 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:04:29,613 INFO L514 BasicCegarLoop]: trace histogram [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, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:04:29,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 06:04:29,614 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:04:29,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:04:29,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1481817610, now seen corresponding path program 1 times [2021-11-20 06:04:29,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:04:29,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046334795] [2021-11-20 06:04:29,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:04:29,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:04:29,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:30,402 INFO L134 CoverageAnalysis]: Checked inductivity of 941 backedges. 712 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-11-20 06:04:30,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:04:30,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046334795] [2021-11-20 06:04:30,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046334795] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:04:30,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:04:30,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:04:30,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409911206] [2021-11-20 06:04:30,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:04:30,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:04:30,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:04:30,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:04:30,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:04:30,406 INFO L87 Difference]: Start difference. First operand 84782 states and 90527 transitions. Second operand has 4 states, 4 states have (on average 104.25) internal successors, (417), 4 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:34,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:04:34,831 INFO L93 Difference]: Finished difference Result 192123 states and 204655 transitions. [2021-11-20 06:04:34,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:04:34,832 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 104.25) internal successors, (417), 4 states have internal predecessors, (417), 0 states have call successors, (0), 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 571 [2021-11-20 06:04:34,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:04:34,964 INFO L225 Difference]: With dead ends: 192123 [2021-11-20 06:04:34,964 INFO L226 Difference]: Without dead ends: 107343 [2021-11-20 06:04:34,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:04:34,992 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 731 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 2345 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 731 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 2743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 2345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:04:34,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [731 Valid, 193 Invalid, 2743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 2345 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-20 06:04:35,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107343 states. [2021-11-20 06:04:36,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107343 to 99685. [2021-11-20 06:04:36,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99685 states, 99684 states have (on average 1.0630492355844468) internal successors, (105969), 99684 states have internal predecessors, (105969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:36,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99685 states to 99685 states and 105969 transitions. [2021-11-20 06:04:36,704 INFO L78 Accepts]: Start accepts. Automaton has 99685 states and 105969 transitions. Word has length 571 [2021-11-20 06:04:36,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:04:36,704 INFO L470 AbstractCegarLoop]: Abstraction has 99685 states and 105969 transitions. [2021-11-20 06:04:36,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.25) internal successors, (417), 4 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:36,705 INFO L276 IsEmpty]: Start isEmpty. Operand 99685 states and 105969 transitions. [2021-11-20 06:04:36,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 599 [2021-11-20 06:04:36,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:04:36,729 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 06:04:36,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 06:04:36,729 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:04:36,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:04:36,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1890721902, now seen corresponding path program 1 times [2021-11-20 06:04:36,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:04:36,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985435205] [2021-11-20 06:04:36,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:04:36,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:04:36,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:37,725 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 422 proven. 72 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-20 06:04:37,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:04:37,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985435205] [2021-11-20 06:04:37,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985435205] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:04:37,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687079950] [2021-11-20 06:04:37,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:04:37,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:04:37,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6e5634-1549-4f6e-b982-151887d500e6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:04:37,736 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6e5634-1549-4f6e-b982-151887d500e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:04:37,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6e5634-1549-4f6e-b982-151887d500e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:04:37,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:37,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:04:37,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:04:39,573 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 301 proven. 29 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-20 06:04:39,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:04:40,599 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 330 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-20 06:04:40,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687079950] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 06:04:40,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:04:40,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 8 [2021-11-20 06:04:40,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559598791] [2021-11-20 06:04:40,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:04:40,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:04:40,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:04:40,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:04:40,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:04:40,603 INFO L87 Difference]: Start difference. First operand 99685 states and 105969 transitions. Second operand has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:45,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:04:45,184 INFO L93 Difference]: Finished difference Result 215552 states and 229227 transitions. [2021-11-20 06:04:45,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:04:45,185 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 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 598 [2021-11-20 06:04:45,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:04:45,326 INFO L225 Difference]: With dead ends: 215552 [2021-11-20 06:04:45,326 INFO L226 Difference]: Without dead ends: 115444 [2021-11-20 06:04:45,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1199 GetRequests, 1192 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:04:45,372 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 883 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 2223 mSolverCounterSat, 386 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 883 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 2609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 386 IncrementalHoareTripleChecker+Valid, 2223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:04:45,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [883 Valid, 159 Invalid, 2609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [386 Valid, 2223 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-11-20 06:04:45,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115444 states. [2021-11-20 06:04:47,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115444 to 110752. [2021-11-20 06:04:47,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110752 states, 110751 states have (on average 1.064378651208567) internal successors, (117881), 110751 states have internal predecessors, (117881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:47,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110752 states to 110752 states and 117881 transitions. [2021-11-20 06:04:47,760 INFO L78 Accepts]: Start accepts. Automaton has 110752 states and 117881 transitions. Word has length 598 [2021-11-20 06:04:47,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:04:47,761 INFO L470 AbstractCegarLoop]: Abstraction has 110752 states and 117881 transitions. [2021-11-20 06:04:47,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:47,761 INFO L276 IsEmpty]: Start isEmpty. Operand 110752 states and 117881 transitions. [2021-11-20 06:04:47,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 618 [2021-11-20 06:04:47,785 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:04:47,786 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-20 06:04:47,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6e5634-1549-4f6e-b982-151887d500e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:04:47,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6e5634-1549-4f6e-b982-151887d500e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:04:47,999 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:04:47,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:04:47,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1810715354, now seen corresponding path program 1 times [2021-11-20 06:04:47,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:04:47,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349967708] [2021-11-20 06:04:47,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:04:48,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:04:48,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:48,267 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 396 proven. 0 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2021-11-20 06:04:48,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:04:48,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349967708] [2021-11-20 06:04:48,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349967708] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:04:48,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:04:48,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:04:48,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576320641] [2021-11-20 06:04:48,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:04:48,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:04:48,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:04:48,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:04:48,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:04:48,272 INFO L87 Difference]: Start difference. First operand 110752 states and 117881 transitions. Second operand has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:51,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:04:51,246 INFO L93 Difference]: Finished difference Result 221507 states and 235760 transitions. [2021-11-20 06:04:51,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:04:51,247 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 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 617 [2021-11-20 06:04:51,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:04:51,397 INFO L225 Difference]: With dead ends: 221507 [2021-11-20 06:04:51,397 INFO L226 Difference]: Without dead ends: 111182 [2021-11-20 06:04:51,447 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 [2021-11-20 06:04:51,447 INFO L933 BasicCegarLoop]: 624 mSDtfsCounter, 491 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:04:51,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [491 Valid, 663 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 1121 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-20 06:04:51,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111182 states. [2021-11-20 06:04:52,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111182 to 109052. [2021-11-20 06:04:53,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109052 states, 109051 states have (on average 1.0607422215293763) internal successors, (115675), 109051 states have internal predecessors, (115675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:53,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109052 states to 109052 states and 115675 transitions. [2021-11-20 06:04:53,692 INFO L78 Accepts]: Start accepts. Automaton has 109052 states and 115675 transitions. Word has length 617 [2021-11-20 06:04:53,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:04:53,693 INFO L470 AbstractCegarLoop]: Abstraction has 109052 states and 115675 transitions. [2021-11-20 06:04:53,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:53,693 INFO L276 IsEmpty]: Start isEmpty. Operand 109052 states and 115675 transitions. [2021-11-20 06:04:53,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 737 [2021-11-20 06:04:53,735 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:04:53,736 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:04:53,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-20 06:04:53,736 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:04:53,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:04:53,737 INFO L85 PathProgramCache]: Analyzing trace with hash 380376202, now seen corresponding path program 1 times [2021-11-20 06:04:53,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:04:53,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003887388] [2021-11-20 06:04:53,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:04:53,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:04:53,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:54,174 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 489 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-20 06:04:54,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:04:54,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003887388] [2021-11-20 06:04:54,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003887388] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:04:54,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:04:54,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:04:54,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336191808] [2021-11-20 06:04:54,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:04:54,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:04:54,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:04:54,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:04:54,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:04:54,180 INFO L87 Difference]: Start difference. First operand 109052 states and 115675 transitions. Second operand has 4 states, 4 states have (on average 143.5) internal successors, (574), 4 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:59,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:04:59,782 INFO L93 Difference]: Finished difference Result 245808 states and 260384 transitions. [2021-11-20 06:04:59,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:04:59,783 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 143.5) internal successors, (574), 4 states have internal predecessors, (574), 0 states have call successors, (0), 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 736 [2021-11-20 06:04:59,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:04:59,952 INFO L225 Difference]: With dead ends: 245808 [2021-11-20 06:04:59,952 INFO L226 Difference]: Without dead ends: 135904 [2021-11-20 06:04:59,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:04:59,990 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 752 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 2390 mSolverCounterSat, 536 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 752 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 2926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 536 IncrementalHoareTripleChecker+Valid, 2390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:04:59,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [752 Valid, 147 Invalid, 2926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [536 Valid, 2390 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-11-20 06:05:00,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135904 states. [2021-11-20 06:05:02,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135904 to 120970. [2021-11-20 06:05:02,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120970 states, 120969 states have (on average 1.0606105696500756) internal successors, (128301), 120969 states have internal predecessors, (128301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:05:02,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120970 states to 120970 states and 128301 transitions. [2021-11-20 06:05:02,421 INFO L78 Accepts]: Start accepts. Automaton has 120970 states and 128301 transitions. Word has length 736 [2021-11-20 06:05:02,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:05:02,421 INFO L470 AbstractCegarLoop]: Abstraction has 120970 states and 128301 transitions. [2021-11-20 06:05:02,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 143.5) internal successors, (574), 4 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:05:02,422 INFO L276 IsEmpty]: Start isEmpty. Operand 120970 states and 128301 transitions. [2021-11-20 06:05:02,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 771 [2021-11-20 06:05:02,463 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:02,464 INFO L514 BasicCegarLoop]: trace histogram [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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:05:02,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-20 06:05:02,464 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:02,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:02,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1722081662, now seen corresponding path program 1 times [2021-11-20 06:05:02,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:02,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184007647] [2021-11-20 06:05:02,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:02,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:02,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:02,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1041 backedges. 789 proven. 80 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-11-20 06:05:02,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:02,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184007647] [2021-11-20 06:05:02,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184007647] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:05:02,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963519490] [2021-11-20 06:05:02,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:02,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:05:02,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6e5634-1549-4f6e-b982-151887d500e6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:05:02,843 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6e5634-1549-4f6e-b982-151887d500e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:05:02,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6e5634-1549-4f6e-b982-151887d500e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:05:03,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:03,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 966 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:05:03,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:05:04,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1041 backedges. 498 proven. 0 refuted. 0 times theorem prover too weak. 543 trivial. 0 not checked. [2021-11-20 06:05:04,508 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:05:04,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963519490] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:05:04,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:05:04,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-20 06:05:04,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822618393] [2021-11-20 06:05:04,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:05:04,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:05:04,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:04,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:05:04,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:05:04,511 INFO L87 Difference]: Start difference. First operand 120970 states and 128301 transitions. Second operand has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:05:07,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:07,648 INFO L93 Difference]: Finished difference Result 246206 states and 261033 transitions. [2021-11-20 06:05:07,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:05:07,655 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 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 770 [2021-11-20 06:05:07,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:07,815 INFO L225 Difference]: With dead ends: 246206 [2021-11-20 06:05:07,815 INFO L226 Difference]: Without dead ends: 125663 [2021-11-20 06:05:07,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 775 GetRequests, 770 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:05:07,872 INFO L933 BasicCegarLoop]: 298 mSDtfsCounter, 440 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1171 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:07,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 348 Invalid, 1255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1171 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 06:05:07,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125663 states.