./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem17_label02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem17_label02.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash adb370abe9a266817aee227dfaf2ff5e2cfdcfe49f97cfc66a125d7a6f5fbb19 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 00:57:49,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 00:57:49,847 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 00:57:49,877 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 00:57:49,878 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 00:57:49,879 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 00:57:49,880 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 00:57:49,883 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 00:57:49,885 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 00:57:49,886 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 00:57:49,887 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 00:57:49,888 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 00:57:49,888 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 00:57:49,889 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 00:57:49,891 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 00:57:49,892 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 00:57:49,893 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 00:57:49,894 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 00:57:49,896 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 00:57:49,898 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 00:57:49,900 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 00:57:49,901 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 00:57:49,903 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 00:57:49,904 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 00:57:49,907 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 00:57:49,908 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 00:57:49,908 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 00:57:49,909 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 00:57:49,910 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 00:57:49,911 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 00:57:49,911 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 00:57:49,912 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 00:57:49,913 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 00:57:49,913 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 00:57:49,914 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 00:57:49,915 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 00:57:49,915 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 00:57:49,915 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 00:57:49,916 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 00:57:49,916 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 00:57:49,917 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 00:57:49,918 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-07 00:57:49,942 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 00:57:49,942 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 00:57:49,942 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 00:57:49,943 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 00:57:49,943 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 00:57:49,944 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 00:57:49,944 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 00:57:49,944 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 00:57:49,945 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 00:57:49,945 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 00:57:49,945 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 00:57:49,945 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 00:57:49,945 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 00:57:49,946 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 00:57:49,946 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 00:57:49,946 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 00:57:49,946 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 00:57:49,946 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 00:57:49,947 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 00:57:49,947 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 00:57:49,947 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 00:57:49,947 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 00:57:49,947 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 00:57:49,948 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 00:57:49,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:57:49,948 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 00:57:49,948 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 00:57:49,948 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 00:57:49,949 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 00:57:49,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 00:57:49,949 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 00:57:49,949 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 00:57:49,949 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 00:57:49,950 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 00:57:49,950 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_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> adb370abe9a266817aee227dfaf2ff5e2cfdcfe49f97cfc66a125d7a6f5fbb19 [2021-12-07 00:57:50,146 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 00:57:50,163 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 00:57:50,165 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 00:57:50,166 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 00:57:50,167 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 00:57:50,168 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/eca-rers2012/Problem17_label02.c [2021-12-07 00:57:50,208 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/data/c2ab3cd27/0cbe6aa6621843c89612313b9391903f/FLAG45ed1281b [2021-12-07 00:57:50,700 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 00:57:50,701 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/sv-benchmarks/c/eca-rers2012/Problem17_label02.c [2021-12-07 00:57:50,717 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/data/c2ab3cd27/0cbe6aa6621843c89612313b9391903f/FLAG45ed1281b [2021-12-07 00:57:50,728 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/data/c2ab3cd27/0cbe6aa6621843c89612313b9391903f [2021-12-07 00:57:50,729 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 00:57:50,731 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 00:57:50,732 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 00:57:50,732 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 00:57:50,735 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 00:57:50,736 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:57:50" (1/1) ... [2021-12-07 00:57:50,737 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b91c88a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:57:50, skipping insertion in model container [2021-12-07 00:57:50,737 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:57:50" (1/1) ... [2021-12-07 00:57:50,744 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 00:57:50,824 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 00:57:50,979 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_e7419efe-4dee-4201-8f3a-98232e3abdf3/sv-benchmarks/c/eca-rers2012/Problem17_label02.c[7859,7872] [2021-12-07 00:57:51,380 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:57:51,386 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 00:57:51,407 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_e7419efe-4dee-4201-8f3a-98232e3abdf3/sv-benchmarks/c/eca-rers2012/Problem17_label02.c[7859,7872] [2021-12-07 00:57:51,640 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:57:51,653 INFO L208 MainTranslator]: Completed translation [2021-12-07 00:57:51,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:57:51 WrapperNode [2021-12-07 00:57:51,653 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 00:57:51,654 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 00:57:51,654 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 00:57:51,654 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 00:57:51,660 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:57:51" (1/1) ... [2021-12-07 00:57:51,710 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:57:51" (1/1) ... [2021-12-07 00:57:51,911 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-12-07 00:57:51,912 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 00:57:51,912 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 00:57:51,913 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 00:57:51,913 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 00:57:51,920 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:57:51" (1/1) ... [2021-12-07 00:57:51,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:57:51" (1/1) ... [2021-12-07 00:57:51,949 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:57:51" (1/1) ... [2021-12-07 00:57:51,950 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:57:51" (1/1) ... [2021-12-07 00:57:52,043 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:57:51" (1/1) ... [2021-12-07 00:57:52,055 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:57:51" (1/1) ... [2021-12-07 00:57:52,093 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:57:51" (1/1) ... [2021-12-07 00:57:52,142 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 00:57:52,143 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 00:57:52,143 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 00:57:52,143 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 00:57:52,144 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:57:51" (1/1) ... [2021-12-07 00:57:52,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:57:52,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:57:52,168 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 00:57:52,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 00:57:52,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 00:57:52,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 00:57:52,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 00:57:52,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 00:57:52,256 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 00:57:52,258 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 00:57:54,635 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 00:57:54,649 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 00:57:54,649 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-07 00:57:54,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:57:54 BoogieIcfgContainer [2021-12-07 00:57:54,652 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 00:57:54,655 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 00:57:54,655 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 00:57:54,658 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 00:57:54,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 12:57:50" (1/3) ... [2021-12-07 00:57:54,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b88fa39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:57:54, skipping insertion in model container [2021-12-07 00:57:54,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:57:51" (2/3) ... [2021-12-07 00:57:54,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b88fa39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:57:54, skipping insertion in model container [2021-12-07 00:57:54,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:57:54" (3/3) ... [2021-12-07 00:57:54,669 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label02.c [2021-12-07 00:57:54,673 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 00:57:54,673 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-07 00:57:54,712 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 00:57:54,717 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-07 00:57:54,717 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-07 00:57:54,741 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) [2021-12-07 00:57:54,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-07 00:57:54,747 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:54,747 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:57:54,748 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:54,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:54,751 INFO L85 PathProgramCache]: Analyzing trace with hash -92557335, now seen corresponding path program 1 times [2021-12-07 00:57:54,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:57:54,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036991763] [2021-12-07 00:57:54,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:54,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:57:54,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:54,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:57:54,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:57:54,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036991763] [2021-12-07 00:57:54,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036991763] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:57:54,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:57:54,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 00:57:54,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109154628] [2021-12-07 00:57:54,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:57:54,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:57:54,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:57:54,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:57:54,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:57:54,989 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 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:57,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:57,256 INFO L93 Difference]: Finished difference Result 1644 states and 3029 transitions. [2021-12-07 00:57:57,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:57:57,258 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2021-12-07 00:57:57,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:57,272 INFO L225 Difference]: With dead ends: 1644 [2021-12-07 00:57:57,272 INFO L226 Difference]: Without dead ends: 977 [2021-12-07 00:57:57,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:57:57,279 INFO L933 BasicCegarLoop]: 425 mSDtfsCounter, 435 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 1802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:57,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 503 Invalid, 1802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-07 00:57:57,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-12-07 00:57:57,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 971. [2021-12-07 00:57:57,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 1.5536082474226804) internal successors, (1507), 970 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:57,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1507 transitions. [2021-12-07 00:57:57,342 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1507 transitions. Word has length 53 [2021-12-07 00:57:57,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:57,343 INFO L470 AbstractCegarLoop]: Abstraction has 971 states and 1507 transitions. [2021-12-07 00:57:57,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:57,343 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1507 transitions. [2021-12-07 00:57:57,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-07 00:57:57,347 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:57,347 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:57:57,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-07 00:57:57,347 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:57,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:57,348 INFO L85 PathProgramCache]: Analyzing trace with hash -10640398, now seen corresponding path program 1 times [2021-12-07 00:57:57,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:57:57,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356418105] [2021-12-07 00:57:57,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:57,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:57:57,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:57,439 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:57:57,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:57:57,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356418105] [2021-12-07 00:57:57,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356418105] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:57:57,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:57:57,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 00:57:57,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945354383] [2021-12-07 00:57:57,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:57:57,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:57:57,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:57:57,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:57:57,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:57:57,442 INFO L87 Difference]: Start difference. First operand 971 states and 1507 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:59,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:59,450 INFO L93 Difference]: Finished difference Result 2813 states and 4381 transitions. [2021-12-07 00:57:59,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:57:59,451 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 0 states have call successors, (0), 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 120 [2021-12-07 00:57:59,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:59,459 INFO L225 Difference]: With dead ends: 2813 [2021-12-07 00:57:59,459 INFO L226 Difference]: Without dead ends: 1844 [2021-12-07 00:57:59,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:57:59,462 INFO L933 BasicCegarLoop]: 506 mSDtfsCounter, 405 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 1706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:59,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 579 Invalid, 1706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1381 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-07 00:57:59,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-12-07 00:57:59,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1841. [2021-12-07 00:57:59,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 1.35) internal successors, (2484), 1840 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:59,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2484 transitions. [2021-12-07 00:57:59,501 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2484 transitions. Word has length 120 [2021-12-07 00:57:59,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:59,501 INFO L470 AbstractCegarLoop]: Abstraction has 1841 states and 2484 transitions. [2021-12-07 00:57:59,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:59,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2484 transitions. [2021-12-07 00:57:59,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-07 00:57:59,504 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:59,505 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, 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] [2021-12-07 00:57:59,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-07 00:57:59,505 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:59,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:59,506 INFO L85 PathProgramCache]: Analyzing trace with hash -703297284, now seen corresponding path program 1 times [2021-12-07 00:57:59,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:57:59,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817939200] [2021-12-07 00:57:59,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:59,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:57:59,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:59,643 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:57:59,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:57:59,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817939200] [2021-12-07 00:57:59,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817939200] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:57:59,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:57:59,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:57:59,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481710438] [2021-12-07 00:57:59,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:57:59,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:57:59,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:57:59,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:57:59,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:57:59,646 INFO L87 Difference]: Start difference. First operand 1841 states and 2484 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:03,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:58:03,105 INFO L93 Difference]: Finished difference Result 6765 states and 9258 transitions. [2021-12-07 00:58:03,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:58:03,106 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 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 123 [2021-12-07 00:58:03,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:58:03,126 INFO L225 Difference]: With dead ends: 6765 [2021-12-07 00:58:03,126 INFO L226 Difference]: Without dead ends: 4926 [2021-12-07 00:58:03,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:58:03,129 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 860 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 2789 mSolverCounterSat, 595 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 3384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 595 IncrementalHoareTripleChecker+Valid, 2789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-07 00:58:03,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [860 Valid, 329 Invalid, 3384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [595 Valid, 2789 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-12-07 00:58:03,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4926 states. [2021-12-07 00:58:03,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4926 to 4875. [2021-12-07 00:58:03,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4875 states, 4874 states have (on average 1.286417726713172) internal successors, (6270), 4874 states have internal predecessors, (6270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:03,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4875 states to 4875 states and 6270 transitions. [2021-12-07 00:58:03,218 INFO L78 Accepts]: Start accepts. Automaton has 4875 states and 6270 transitions. Word has length 123 [2021-12-07 00:58:03,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:58:03,218 INFO L470 AbstractCegarLoop]: Abstraction has 4875 states and 6270 transitions. [2021-12-07 00:58:03,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:03,219 INFO L276 IsEmpty]: Start isEmpty. Operand 4875 states and 6270 transitions. [2021-12-07 00:58:03,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-12-07 00:58:03,222 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:58:03,222 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:58:03,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-07 00:58:03,222 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:58:03,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:58:03,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1839715273, now seen corresponding path program 1 times [2021-12-07 00:58:03,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:58:03,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995487347] [2021-12-07 00:58:03,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:03,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:58:03,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:03,304 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-07 00:58:03,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:58:03,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995487347] [2021-12-07 00:58:03,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995487347] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:58:03,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:58:03,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 00:58:03,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140985592] [2021-12-07 00:58:03,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:58:03,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:58:03,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:58:03,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:58:03,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:58:03,306 INFO L87 Difference]: Start difference. First operand 4875 states and 6270 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 2 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:05,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:58:05,123 INFO L93 Difference]: Finished difference Result 14436 states and 18541 transitions. [2021-12-07 00:58:05,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:58:05,123 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 2 states have internal predecessors, (126), 0 states have call successors, (0), 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 194 [2021-12-07 00:58:05,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:58:05,153 INFO L225 Difference]: With dead ends: 14436 [2021-12-07 00:58:05,153 INFO L226 Difference]: Without dead ends: 8277 [2021-12-07 00:58:05,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:58:05,160 INFO L933 BasicCegarLoop]: 515 mSDtfsCounter, 386 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-07 00:58:05,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 590 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-07 00:58:05,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8277 states. [2021-12-07 00:58:05,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8277 to 6147. [2021-12-07 00:58:05,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6147 states, 6146 states have (on average 1.1906931337455255) internal successors, (7318), 6146 states have internal predecessors, (7318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:05,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6147 states to 6147 states and 7318 transitions. [2021-12-07 00:58:05,260 INFO L78 Accepts]: Start accepts. Automaton has 6147 states and 7318 transitions. Word has length 194 [2021-12-07 00:58:05,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:58:05,260 INFO L470 AbstractCegarLoop]: Abstraction has 6147 states and 7318 transitions. [2021-12-07 00:58:05,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 2 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:05,260 INFO L276 IsEmpty]: Start isEmpty. Operand 6147 states and 7318 transitions. [2021-12-07 00:58:05,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-12-07 00:58:05,263 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:58:05,263 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:58:05,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-07 00:58:05,263 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:58:05,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:58:05,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1977125269, now seen corresponding path program 1 times [2021-12-07 00:58:05,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:58:05,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164387867] [2021-12-07 00:58:05,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:05,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:58:05,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:05,349 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-07 00:58:05,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:58:05,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164387867] [2021-12-07 00:58:05,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164387867] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:58:05,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:58:05,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:58:05,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530877756] [2021-12-07 00:58:05,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:58:05,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:58:05,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:58:05,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:58:05,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:58:05,351 INFO L87 Difference]: Start difference. First operand 6147 states and 7318 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:07,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:58:07,164 INFO L93 Difference]: Finished difference Result 15692 states and 18897 transitions. [2021-12-07 00:58:07,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:58:07,165 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 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 207 [2021-12-07 00:58:07,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:58:07,196 INFO L225 Difference]: With dead ends: 15692 [2021-12-07 00:58:07,196 INFO L226 Difference]: Without dead ends: 9547 [2021-12-07 00:58:07,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:58:07,201 INFO L933 BasicCegarLoop]: 413 mSDtfsCounter, 407 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1274 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 1592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 1274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-07 00:58:07,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 477 Invalid, 1592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 1274 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-07 00:58:07,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9547 states. [2021-12-07 00:58:07,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9547 to 6124. [2021-12-07 00:58:07,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6124 states, 6123 states have (on average 1.1894496162012085) internal successors, (7283), 6123 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:07,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6124 states to 6124 states and 7283 transitions. [2021-12-07 00:58:07,293 INFO L78 Accepts]: Start accepts. Automaton has 6124 states and 7283 transitions. Word has length 207 [2021-12-07 00:58:07,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:58:07,293 INFO L470 AbstractCegarLoop]: Abstraction has 6124 states and 7283 transitions. [2021-12-07 00:58:07,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:07,294 INFO L276 IsEmpty]: Start isEmpty. Operand 6124 states and 7283 transitions. [2021-12-07 00:58:07,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-12-07 00:58:07,296 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:58:07,296 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:58:07,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-07 00:58:07,297 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:58:07,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:58:07,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1027746944, now seen corresponding path program 1 times [2021-12-07 00:58:07,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:58:07,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699260143] [2021-12-07 00:58:07,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:07,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:58:07,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:07,395 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 176 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:58:07,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:58:07,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699260143] [2021-12-07 00:58:07,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699260143] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:58:07,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:58:07,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:58:07,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888843020] [2021-12-07 00:58:07,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:58:07,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:58:07,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:58:07,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:58:07,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:58:07,398 INFO L87 Difference]: Start difference. First operand 6124 states and 7283 transitions. Second operand has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:09,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:58:09,616 INFO L93 Difference]: Finished difference Result 16114 states and 19480 transitions. [2021-12-07 00:58:09,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:58:09,617 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 214 [2021-12-07 00:58:09,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:58:09,638 INFO L225 Difference]: With dead ends: 16114 [2021-12-07 00:58:09,638 INFO L226 Difference]: Without dead ends: 9992 [2021-12-07 00:58:09,643 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 [2021-12-07 00:58:09,644 INFO L933 BasicCegarLoop]: 730 mSDtfsCounter, 600 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2336 mSolverCounterSat, 558 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 2894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 558 IncrementalHoareTripleChecker+Valid, 2336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:58:09,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 863 Invalid, 2894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [558 Valid, 2336 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-07 00:58:09,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9992 states. [2021-12-07 00:58:09,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9992 to 9956. [2021-12-07 00:58:09,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9956 states, 9955 states have (on average 1.171672526368659) internal successors, (11664), 9955 states have internal predecessors, (11664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:09,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9956 states to 9956 states and 11664 transitions. [2021-12-07 00:58:09,752 INFO L78 Accepts]: Start accepts. Automaton has 9956 states and 11664 transitions. Word has length 214 [2021-12-07 00:58:09,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:58:09,752 INFO L470 AbstractCegarLoop]: Abstraction has 9956 states and 11664 transitions. [2021-12-07 00:58:09,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:09,753 INFO L276 IsEmpty]: Start isEmpty. Operand 9956 states and 11664 transitions. [2021-12-07 00:58:09,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2021-12-07 00:58:09,756 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:58:09,756 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:58:09,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-07 00:58:09,757 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:58:09,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:58:09,757 INFO L85 PathProgramCache]: Analyzing trace with hash 173331966, now seen corresponding path program 1 times [2021-12-07 00:58:09,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:58:09,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731826154] [2021-12-07 00:58:09,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:09,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:58:09,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:09,868 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 240 proven. 70 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-07 00:58:09,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:58:09,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731826154] [2021-12-07 00:58:09,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731826154] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:58:09,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742260752] [2021-12-07 00:58:09,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:09,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:58:09,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:58:09,870 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:58:09,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 00:58:09,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:09,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 00:58:09,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:58:10,498 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 240 proven. 70 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-07 00:58:10,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:58:10,780 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 310 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-07 00:58:10,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742260752] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-07 00:58:10,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:58:10,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2021-12-07 00:58:10,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370929855] [2021-12-07 00:58:10,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:58:10,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:58:10,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:58:10,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:58:10,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:58:10,782 INFO L87 Difference]: Start difference. First operand 9956 states and 11664 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) [2021-12-07 00:58:13,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:58:13,989 INFO L93 Difference]: Finished difference Result 30575 states and 36167 transitions. [2021-12-07 00:58:13,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:58:13,990 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 277 [2021-12-07 00:58:13,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:58:14,012 INFO L225 Difference]: With dead ends: 30575 [2021-12-07 00:58:14,012 INFO L226 Difference]: Without dead ends: 19763 [2021-12-07 00:58:14,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 549 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:58:14,022 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 890 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2266 mSolverCounterSat, 735 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 890 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 3001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 735 IncrementalHoareTripleChecker+Valid, 2266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:58:14,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [890 Valid, 162 Invalid, 3001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [735 Valid, 2266 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-07 00:58:14,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19763 states. [2021-12-07 00:58:14,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19763 to 19760. [2021-12-07 00:58:14,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19760 states, 19759 states have (on average 1.1599777316665822) internal successors, (22920), 19759 states have internal predecessors, (22920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:14,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19760 states to 19760 states and 22920 transitions. [2021-12-07 00:58:14,207 INFO L78 Accepts]: Start accepts. Automaton has 19760 states and 22920 transitions. Word has length 277 [2021-12-07 00:58:14,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:58:14,207 INFO L470 AbstractCegarLoop]: Abstraction has 19760 states and 22920 transitions. [2021-12-07 00:58:14,207 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) [2021-12-07 00:58:14,207 INFO L276 IsEmpty]: Start isEmpty. Operand 19760 states and 22920 transitions. [2021-12-07 00:58:14,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-12-07 00:58:14,211 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:58:14,211 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:58:14,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 00:58:14,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-07 00:58:14,413 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:58:14,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:58:14,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1525566454, now seen corresponding path program 1 times [2021-12-07 00:58:14,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:58:14,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384565146] [2021-12-07 00:58:14,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:14,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:58:14,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:14,530 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 295 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-07 00:58:14,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:58:14,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384565146] [2021-12-07 00:58:14,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384565146] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:58:14,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:58:14,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:58:14,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194135046] [2021-12-07 00:58:14,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:58:14,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:58:14,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:58:14,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:58:14,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:58:14,532 INFO L87 Difference]: Start difference. First operand 19760 states and 22920 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 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) [2021-12-07 00:58:16,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:58:16,330 INFO L93 Difference]: Finished difference Result 42909 states and 49989 transitions. [2021-12-07 00:58:16,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:58:16,331 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 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 290 [2021-12-07 00:58:16,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:58:16,370 INFO L225 Difference]: With dead ends: 42909 [2021-12-07 00:58:16,370 INFO L226 Difference]: Without dead ends: 23151 [2021-12-07 00:58:16,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:58:16,384 INFO L933 BasicCegarLoop]: 826 mSDtfsCounter, 374 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 1457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-07 00:58:16,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 896 Invalid, 1457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 1237 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-07 00:58:16,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23151 states. [2021-12-07 00:58:16,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23151 to 22725. [2021-12-07 00:58:16,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22725 states, 22724 states have (on average 1.1456169688435134) internal successors, (26033), 22724 states have internal predecessors, (26033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:16,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22725 states to 22725 states and 26033 transitions. [2021-12-07 00:58:16,611 INFO L78 Accepts]: Start accepts. Automaton has 22725 states and 26033 transitions. Word has length 290 [2021-12-07 00:58:16,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:58:16,612 INFO L470 AbstractCegarLoop]: Abstraction has 22725 states and 26033 transitions. [2021-12-07 00:58:16,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 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) [2021-12-07 00:58:16,612 INFO L276 IsEmpty]: Start isEmpty. Operand 22725 states and 26033 transitions. [2021-12-07 00:58:16,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2021-12-07 00:58:16,615 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:58:16,615 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, 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, 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] [2021-12-07 00:58:16,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-07 00:58:16,615 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:58:16,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:58:16,616 INFO L85 PathProgramCache]: Analyzing trace with hash -162552321, now seen corresponding path program 1 times [2021-12-07 00:58:16,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:58:16,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339903497] [2021-12-07 00:58:16,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:16,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:58:16,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:16,742 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 295 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-07 00:58:16,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:58:16,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339903497] [2021-12-07 00:58:16,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339903497] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:58:16,742 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:58:16,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:58:16,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333252503] [2021-12-07 00:58:16,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:58:16,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:58:16,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:58:16,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:58:16,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:58:16,743 INFO L87 Difference]: Start difference. First operand 22725 states and 26033 transitions. Second operand has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 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) [2021-12-07 00:58:20,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:58:20,530 INFO L93 Difference]: Finished difference Result 64237 states and 73654 transitions. [2021-12-07 00:58:20,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:58:20,531 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 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 313 [2021-12-07 00:58:20,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:58:20,561 INFO L225 Difference]: With dead ends: 64237 [2021-12-07 00:58:20,561 INFO L226 Difference]: Without dead ends: 38101 [2021-12-07 00:58:20,576 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 [2021-12-07 00:58:20,577 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 854 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 2908 mSolverCounterSat, 470 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 854 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 3378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 470 IncrementalHoareTripleChecker+Valid, 2908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-07 00:58:20,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [854 Valid, 371 Invalid, 3378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [470 Valid, 2908 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-12-07 00:58:20,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38101 states. [2021-12-07 00:58:20,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38101 to 37204. [2021-12-07 00:58:20,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37204 states, 37203 states have (on average 1.137462032631777) internal successors, (42317), 37203 states have internal predecessors, (42317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:20,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37204 states to 37204 states and 42317 transitions. [2021-12-07 00:58:20,935 INFO L78 Accepts]: Start accepts. Automaton has 37204 states and 42317 transitions. Word has length 313 [2021-12-07 00:58:20,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:58:20,936 INFO L470 AbstractCegarLoop]: Abstraction has 37204 states and 42317 transitions. [2021-12-07 00:58:20,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 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) [2021-12-07 00:58:20,936 INFO L276 IsEmpty]: Start isEmpty. Operand 37204 states and 42317 transitions. [2021-12-07 00:58:20,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-12-07 00:58:20,940 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:58:20,940 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, 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, 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] [2021-12-07 00:58:20,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-07 00:58:20,940 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:58:20,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:58:20,941 INFO L85 PathProgramCache]: Analyzing trace with hash -769673228, now seen corresponding path program 1 times [2021-12-07 00:58:20,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:58:20,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382956779] [2021-12-07 00:58:20,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:20,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:58:20,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:21,073 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 326 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-07 00:58:21,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:58:21,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382956779] [2021-12-07 00:58:21,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382956779] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:58:21,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:58:21,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:58:21,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310087602] [2021-12-07 00:58:21,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:58:21,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:58:21,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:58:21,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:58:21,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:58:21,076 INFO L87 Difference]: Start difference. First operand 37204 states and 42317 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) [2021-12-07 00:58:22,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:58:22,980 INFO L93 Difference]: Finished difference Result 90182 states and 102746 transitions. [2021-12-07 00:58:22,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:58:22,981 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 328 [2021-12-07 00:58:22,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:58:23,050 INFO L225 Difference]: With dead ends: 90182 [2021-12-07 00:58:23,050 INFO L226 Difference]: Without dead ends: 51278 [2021-12-07 00:58:23,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:58:23,063 INFO L933 BasicCegarLoop]: 752 mSDtfsCounter, 363 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1227 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 1227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-07 00:58:23,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 824 Invalid, 1477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 1227 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-07 00:58:23,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51278 states. [2021-12-07 00:58:23,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51278 to 49991. [2021-12-07 00:58:23,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49991 states, 49990 states have (on average 1.1124624924984996) internal successors, (55612), 49990 states have internal predecessors, (55612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:23,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49991 states to 49991 states and 55612 transitions. [2021-12-07 00:58:23,532 INFO L78 Accepts]: Start accepts. Automaton has 49991 states and 55612 transitions. Word has length 328 [2021-12-07 00:58:23,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:58:23,532 INFO L470 AbstractCegarLoop]: Abstraction has 49991 states and 55612 transitions. [2021-12-07 00:58:23,532 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) [2021-12-07 00:58:23,532 INFO L276 IsEmpty]: Start isEmpty. Operand 49991 states and 55612 transitions. [2021-12-07 00:58:23,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2021-12-07 00:58:23,537 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:58:23,537 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, 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, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:58:23,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-07 00:58:23,538 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:58:23,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:58:23,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1314932159, now seen corresponding path program 1 times [2021-12-07 00:58:23,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:58:23,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155164362] [2021-12-07 00:58:23,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:23,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:58:23,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:23,699 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 361 proven. 214 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-07 00:58:23,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:58:23,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155164362] [2021-12-07 00:58:23,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155164362] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:58:23,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384816215] [2021-12-07 00:58:23,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:23,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:58:23,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:58:23,701 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:58:23,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 00:58:23,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:23,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 00:58:23,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:58:24,279 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 381 proven. 73 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-12-07 00:58:24,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:58:24,614 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 454 proven. 0 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-12-07 00:58:24,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384816215] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-07 00:58:24,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:58:24,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 6 [2021-12-07 00:58:24,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075148713] [2021-12-07 00:58:24,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:58:24,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:58:24,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:58:24,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:58:24,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:58:24,616 INFO L87 Difference]: Start difference. First operand 49991 states and 55612 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) [2021-12-07 00:58:27,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:58:27,921 INFO L93 Difference]: Finished difference Result 118728 states and 132318 transitions. [2021-12-07 00:58:27,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:58:27,922 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 351 [2021-12-07 00:58:27,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:58:28,005 INFO L225 Difference]: With dead ends: 118728 [2021-12-07 00:58:28,005 INFO L226 Difference]: Without dead ends: 68739 [2021-12-07 00:58:28,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 697 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:58:28,022 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 923 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 2317 mSolverCounterSat, 674 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 2991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 674 IncrementalHoareTripleChecker+Valid, 2317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:58:28,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [923 Valid, 182 Invalid, 2991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [674 Valid, 2317 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-07 00:58:28,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68739 states. [2021-12-07 00:58:28,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68739 to 64908. [2021-12-07 00:58:28,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64908 states, 64907 states have (on average 1.1170597932426394) internal successors, (72505), 64907 states have internal predecessors, (72505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:28,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64908 states to 64908 states and 72505 transitions. [2021-12-07 00:58:28,736 INFO L78 Accepts]: Start accepts. Automaton has 64908 states and 72505 transitions. Word has length 351 [2021-12-07 00:58:28,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:58:28,737 INFO L470 AbstractCegarLoop]: Abstraction has 64908 states and 72505 transitions. [2021-12-07 00:58:28,737 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) [2021-12-07 00:58:28,737 INFO L276 IsEmpty]: Start isEmpty. Operand 64908 states and 72505 transitions. [2021-12-07 00:58:28,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2021-12-07 00:58:28,743 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:58:28,743 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, 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, 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] [2021-12-07 00:58:28,764 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-07 00:58:28,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:58:28,945 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:58:28,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:58:28,947 INFO L85 PathProgramCache]: Analyzing trace with hash -444093731, now seen corresponding path program 1 times [2021-12-07 00:58:28,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:58:28,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933708761] [2021-12-07 00:58:28,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:28,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:58:29,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:29,105 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-12-07 00:58:29,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:58:29,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933708761] [2021-12-07 00:58:29,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933708761] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:58:29,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:58:29,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:58:29,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583120698] [2021-12-07 00:58:29,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:58:29,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:58:29,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:58:29,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:58:29,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:58:29,107 INFO L87 Difference]: Start difference. First operand 64908 states and 72505 transitions. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:31,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:58:31,161 INFO L93 Difference]: Finished difference Result 142175 states and 159014 transitions. [2021-12-07 00:58:31,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:58:31,161 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 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 365 [2021-12-07 00:58:31,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:58:31,238 INFO L225 Difference]: With dead ends: 142175 [2021-12-07 00:58:31,238 INFO L226 Difference]: Without dead ends: 76833 [2021-12-07 00:58:31,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:58:31,267 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 470 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 1548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 1269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-07 00:58:31,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 301 Invalid, 1548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 1269 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-07 00:58:31,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76833 states. [2021-12-07 00:58:31,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76833 to 73419. [2021-12-07 00:58:31,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73419 states, 73418 states have (on average 1.1121250919393064) internal successors, (81650), 73418 states have internal predecessors, (81650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:32,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73419 states to 73419 states and 81650 transitions. [2021-12-07 00:58:32,056 INFO L78 Accepts]: Start accepts. Automaton has 73419 states and 81650 transitions. Word has length 365 [2021-12-07 00:58:32,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:58:32,057 INFO L470 AbstractCegarLoop]: Abstraction has 73419 states and 81650 transitions. [2021-12-07 00:58:32,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:32,057 INFO L276 IsEmpty]: Start isEmpty. Operand 73419 states and 81650 transitions. [2021-12-07 00:58:32,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2021-12-07 00:58:32,062 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:58:32,062 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, 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, 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] [2021-12-07 00:58:32,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-07 00:58:32,063 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:58:32,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:58:32,063 INFO L85 PathProgramCache]: Analyzing trace with hash -2004060531, now seen corresponding path program 1 times [2021-12-07 00:58:32,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:58:32,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031167504] [2021-12-07 00:58:32,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:32,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:58:32,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:32,241 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 414 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-12-07 00:58:32,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:58:32,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031167504] [2021-12-07 00:58:32,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031167504] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:58:32,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:58:32,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:58:32,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185315377] [2021-12-07 00:58:32,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:58:32,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:58:32,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:58:32,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:58:32,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:58:32,243 INFO L87 Difference]: Start difference. First operand 73419 states and 81650 transitions. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:34,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:58:34,077 INFO L93 Difference]: Finished difference Result 163003 states and 181528 transitions. [2021-12-07 00:58:34,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:58:34,077 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 381 [2021-12-07 00:58:34,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:58:34,158 INFO L225 Difference]: With dead ends: 163003 [2021-12-07 00:58:34,158 INFO L226 Difference]: Without dead ends: 88309 [2021-12-07 00:58:34,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:58:34,186 INFO L933 BasicCegarLoop]: 762 mSDtfsCounter, 388 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:58:34,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 819 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 1182 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-07 00:58:34,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88309 states. [2021-12-07 00:58:34,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88309 to 72958. [2021-12-07 00:58:35,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72958 states, 72957 states have (on average 1.110955768466357) internal successors, (81052), 72957 states have internal predecessors, (81052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:35,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72958 states to 72958 states and 81052 transitions. [2021-12-07 00:58:35,115 INFO L78 Accepts]: Start accepts. Automaton has 72958 states and 81052 transitions. Word has length 381 [2021-12-07 00:58:35,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:58:35,116 INFO L470 AbstractCegarLoop]: Abstraction has 72958 states and 81052 transitions. [2021-12-07 00:58:35,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:35,117 INFO L276 IsEmpty]: Start isEmpty. Operand 72958 states and 81052 transitions. [2021-12-07 00:58:35,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2021-12-07 00:58:35,123 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:58:35,124 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, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:58:35,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-07 00:58:35,124 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:58:35,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:58:35,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1666713624, now seen corresponding path program 1 times [2021-12-07 00:58:35,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:58:35,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499720903] [2021-12-07 00:58:35,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:35,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:58:35,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:35,237 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 561 proven. 0 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-12-07 00:58:35,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:58:35,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499720903] [2021-12-07 00:58:35,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499720903] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:58:35,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:58:35,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:58:35,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970458921] [2021-12-07 00:58:35,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:58:35,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:58:35,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:58:35,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:58:35,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:58:35,239 INFO L87 Difference]: Start difference. First operand 72958 states and 81052 transitions. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:37,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:58:37,551 INFO L93 Difference]: Finished difference Result 166355 states and 185074 transitions. [2021-12-07 00:58:37,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:58:37,552 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 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 399 [2021-12-07 00:58:37,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:58:37,649 INFO L225 Difference]: With dead ends: 166355 [2021-12-07 00:58:37,649 INFO L226 Difference]: Without dead ends: 92969 [2021-12-07 00:58:37,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:58:37,693 INFO L933 BasicCegarLoop]: 307 mSDtfsCounter, 409 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1253 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 1457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 1253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:58:37,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 362 Invalid, 1457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 1253 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-07 00:58:37,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92969 states. [2021-12-07 00:58:38,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92969 to 88271. [2021-12-07 00:58:38,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88271 states, 88270 states have (on average 1.1049280616290926) internal successors, (97532), 88270 states have internal predecessors, (97532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:38,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88271 states to 88271 states and 97532 transitions. [2021-12-07 00:58:38,654 INFO L78 Accepts]: Start accepts. Automaton has 88271 states and 97532 transitions. Word has length 399 [2021-12-07 00:58:38,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:58:38,655 INFO L470 AbstractCegarLoop]: Abstraction has 88271 states and 97532 transitions. [2021-12-07 00:58:38,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:38,655 INFO L276 IsEmpty]: Start isEmpty. Operand 88271 states and 97532 transitions. [2021-12-07 00:58:38,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2021-12-07 00:58:38,661 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:58:38,661 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, 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, 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] [2021-12-07 00:58:38,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-07 00:58:38,661 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:58:38,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:58:38,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1497264050, now seen corresponding path program 1 times [2021-12-07 00:58:38,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:58:38,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127970575] [2021-12-07 00:58:38,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:38,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:58:38,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:38,755 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 447 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-12-07 00:58:38,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:58:38,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127970575] [2021-12-07 00:58:38,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127970575] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:58:38,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:58:38,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:58:38,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395538839] [2021-12-07 00:58:38,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:58:38,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:58:38,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:58:38,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:58:38,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:58:38,756 INFO L87 Difference]: Start difference. First operand 88271 states and 97532 transitions. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:40,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:58:40,744 INFO L93 Difference]: Finished difference Result 185045 states and 204010 transitions. [2021-12-07 00:58:40,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:58:40,745 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 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 403 [2021-12-07 00:58:40,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:58:40,843 INFO L225 Difference]: With dead ends: 185045 [2021-12-07 00:58:40,843 INFO L226 Difference]: Without dead ends: 96775 [2021-12-07 00:58:40,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:58:40,887 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 388 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 1379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:58:40,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 315 Invalid, 1379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 1180 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-07 00:58:40,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96775 states. [2021-12-07 00:58:41,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96775 to 91669. [2021-12-07 00:58:41,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91669 states, 91668 states have (on average 1.1009076231618449) internal successors, (100918), 91668 states have internal predecessors, (100918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:42,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91669 states to 91669 states and 100918 transitions. [2021-12-07 00:58:42,019 INFO L78 Accepts]: Start accepts. Automaton has 91669 states and 100918 transitions. Word has length 403 [2021-12-07 00:58:42,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:58:42,019 INFO L470 AbstractCegarLoop]: Abstraction has 91669 states and 100918 transitions. [2021-12-07 00:58:42,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:42,019 INFO L276 IsEmpty]: Start isEmpty. Operand 91669 states and 100918 transitions. [2021-12-07 00:58:42,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-12-07 00:58:42,027 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:58:42,028 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, 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, 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] [2021-12-07 00:58:42,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-07 00:58:42,028 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:58:42,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:58:42,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1444998463, now seen corresponding path program 1 times [2021-12-07 00:58:42,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:58:42,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742229875] [2021-12-07 00:58:42,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:42,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:58:42,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:42,180 INFO L134 CoverageAnalysis]: Checked inductivity of 687 backedges. 367 proven. 51 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-12-07 00:58:42,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:58:42,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742229875] [2021-12-07 00:58:42,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742229875] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:58:42,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192780457] [2021-12-07 00:58:42,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:42,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:58:42,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:58:42,182 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:58:42,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 00:58:42,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:42,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-07 00:58:42,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:58:42,834 INFO L134 CoverageAnalysis]: Checked inductivity of 687 backedges. 431 proven. 82 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-12-07 00:58:42,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:58:43,794 INFO L134 CoverageAnalysis]: Checked inductivity of 687 backedges. 431 proven. 82 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-12-07 00:58:43,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192780457] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:58:43,795 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:58:43,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2021-12-07 00:58:43,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851699324] [2021-12-07 00:58:43,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:58:43,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 00:58:43,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:58:43,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 00:58:43,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-07 00:58:43,796 INFO L87 Difference]: Start difference. First operand 91669 states and 100918 transitions. Second operand has 9 states, 9 states have (on average 83.11111111111111) internal successors, (748), 9 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:57,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:58:57,780 INFO L93 Difference]: Finished difference Result 231449 states and 253507 transitions. [2021-12-07 00:58:57,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-07 00:58:57,780 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 83.11111111111111) internal successors, (748), 9 states have internal predecessors, (748), 0 states have call successors, (0), 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 433 [2021-12-07 00:58:57,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:58:57,913 INFO L225 Difference]: With dead ends: 231449 [2021-12-07 00:58:57,913 INFO L226 Difference]: Without dead ends: 134674 [2021-12-07 00:58:57,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 903 GetRequests, 879 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=172, Invalid=478, Unknown=0, NotChecked=0, Total=650 [2021-12-07 00:58:57,958 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 12245 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 12757 mSolverCounterSat, 3465 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12245 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 16222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3465 IncrementalHoareTripleChecker+Valid, 12757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:58:57,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12245 Valid, 407 Invalid, 16222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3465 Valid, 12757 Invalid, 0 Unknown, 0 Unchecked, 13.0s Time] [2021-12-07 00:58:58,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134674 states. [2021-12-07 00:58:59,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134674 to 109932. [2021-12-07 00:58:59,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109932 states, 109931 states have (on average 1.0795044164066552) internal successors, (118671), 109931 states have internal predecessors, (118671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:59,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109932 states to 109932 states and 118671 transitions. [2021-12-07 00:58:59,298 INFO L78 Accepts]: Start accepts. Automaton has 109932 states and 118671 transitions. Word has length 433 [2021-12-07 00:58:59,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:58:59,298 INFO L470 AbstractCegarLoop]: Abstraction has 109932 states and 118671 transitions. [2021-12-07 00:58:59,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 83.11111111111111) internal successors, (748), 9 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:59,299 INFO L276 IsEmpty]: Start isEmpty. Operand 109932 states and 118671 transitions. [2021-12-07 00:58:59,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2021-12-07 00:58:59,307 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:58:59,308 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:58:59,328 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 00:58:59,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-07 00:58:59,509 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:58:59,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:58:59,511 INFO L85 PathProgramCache]: Analyzing trace with hash -273409696, now seen corresponding path program 1 times [2021-12-07 00:58:59,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:58:59,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928944835] [2021-12-07 00:58:59,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:59,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:58:59,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:59,661 INFO L134 CoverageAnalysis]: Checked inductivity of 755 backedges. 473 proven. 0 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2021-12-07 00:58:59,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:58:59,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928944835] [2021-12-07 00:58:59,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928944835] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:58:59,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:58:59,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:58:59,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517803991] [2021-12-07 00:58:59,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:58:59,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:58:59,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:58:59,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:58:59,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:58:59,663 INFO L87 Difference]: Start difference. First operand 109932 states and 118671 transitions. Second operand has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:59:01,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:59:01,667 INFO L93 Difference]: Finished difference Result 223266 states and 240901 transitions. [2021-12-07 00:59:01,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:59:01,668 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 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 498 [2021-12-07 00:59:01,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:59:01,795 INFO L225 Difference]: With dead ends: 223266 [2021-12-07 00:59:01,795 INFO L226 Difference]: Without dead ends: 112911 [2021-12-07 00:59:01,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:59:01,851 INFO L933 BasicCegarLoop]: 292 mSDtfsCounter, 364 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 1398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:59:01,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 338 Invalid, 1398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1200 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-07 00:59:01,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112911 states. [2021-12-07 00:59:03,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112911 to 102687. [2021-12-07 00:59:03,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102687 states, 102686 states have (on average 1.0795726778723487) internal successors, (110857), 102686 states have internal predecessors, (110857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:59:03,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102687 states to 102687 states and 110857 transitions. [2021-12-07 00:59:03,401 INFO L78 Accepts]: Start accepts. Automaton has 102687 states and 110857 transitions. Word has length 498 [2021-12-07 00:59:03,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:59:03,401 INFO L470 AbstractCegarLoop]: Abstraction has 102687 states and 110857 transitions. [2021-12-07 00:59:03,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:59:03,401 INFO L276 IsEmpty]: Start isEmpty. Operand 102687 states and 110857 transitions. [2021-12-07 00:59:03,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2021-12-07 00:59:03,409 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:59:03,409 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:59:03,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-07 00:59:03,410 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:59:03,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:59:03,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1456772986, now seen corresponding path program 1 times [2021-12-07 00:59:03,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:59:03,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891128489] [2021-12-07 00:59:03,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:59:03,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:59:03,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:03,550 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 265 proven. 51 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-07 00:59:03,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:59:03,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891128489] [2021-12-07 00:59:03,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891128489] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:59:03,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409977137] [2021-12-07 00:59:03,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:59:03,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:59:03,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:59:03,551 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:59:03,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 00:59:03,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:03,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 00:59:03,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:59:04,618 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 265 proven. 51 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-07 00:59:04,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:59:06,152 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 265 proven. 51 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-07 00:59:06,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409977137] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:59:06,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:59:06,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-07 00:59:06,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372143180] [2021-12-07 00:59:06,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:59:06,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 00:59:06,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:59:06,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 00:59:06,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:59:06,155 INFO L87 Difference]: Start difference. First operand 102687 states and 110857 transitions. Second operand has 8 states, 8 states have (on average 140.125) internal successors, (1121), 8 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:59:15,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:59:15,920 INFO L93 Difference]: Finished difference Result 258627 states and 278034 transitions. [2021-12-07 00:59:15,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-07 00:59:15,921 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 140.125) internal successors, (1121), 8 states have internal predecessors, (1121), 0 states have call successors, (0), 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 511 [2021-12-07 00:59:15,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:59:16,064 INFO L225 Difference]: With dead ends: 258627 [2021-12-07 00:59:16,064 INFO L226 Difference]: Without dead ends: 152964 [2021-12-07 00:59:16,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1034 GetRequests, 1023 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-12-07 00:59:16,097 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 2800 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 6139 mSolverCounterSat, 1839 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2800 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 10670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1839 IncrementalHoareTripleChecker+Valid, 6139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2692 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2021-12-07 00:59:16,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2800 Valid, 272 Invalid, 10670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1839 Valid, 6139 Invalid, 0 Unknown, 2692 Unchecked, 8.9s Time] [2021-12-07 00:59:16,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152964 states. [2021-12-07 00:59:17,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152964 to 121826. [2021-12-07 00:59:17,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121826 states, 121825 states have (on average 1.0674245844449004) internal successors, (130039), 121825 states have internal predecessors, (130039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:59:17,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121826 states to 121826 states and 130039 transitions. [2021-12-07 00:59:17,519 INFO L78 Accepts]: Start accepts. Automaton has 121826 states and 130039 transitions. Word has length 511 [2021-12-07 00:59:17,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:59:17,520 INFO L470 AbstractCegarLoop]: Abstraction has 121826 states and 130039 transitions. [2021-12-07 00:59:17,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 140.125) internal successors, (1121), 8 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:59:17,520 INFO L276 IsEmpty]: Start isEmpty. Operand 121826 states and 130039 transitions. [2021-12-07 00:59:17,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2021-12-07 00:59:17,531 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:59:17,531 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:59:17,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-07 00:59:17,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-07 00:59:17,733 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:59:17,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:59:17,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1481797377, now seen corresponding path program 1 times [2021-12-07 00:59:17,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:59:17,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569366230] [2021-12-07 00:59:17,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:59:17,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:59:17,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:17,898 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 295 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-07 00:59:17,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:59:17,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569366230] [2021-12-07 00:59:17,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569366230] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:59:17,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:59:17,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:59:17,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555423289] [2021-12-07 00:59:17,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:59:17,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:59:17,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:59:17,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:59:17,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:59:17,899 INFO L87 Difference]: Start difference. First operand 121826 states and 130039 transitions. Second operand has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:59:20,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:59:20,091 INFO L93 Difference]: Finished difference Result 241514 states and 257539 transitions. [2021-12-07 00:59:20,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:59:20,092 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 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 522 [2021-12-07 00:59:20,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:59:20,203 INFO L225 Difference]: With dead ends: 241514 [2021-12-07 00:59:20,203 INFO L226 Difference]: Without dead ends: 119690 [2021-12-07 00:59:20,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:59:20,232 INFO L933 BasicCegarLoop]: 646 mSDtfsCounter, 401 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:59:20,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 684 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1176 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-07 00:59:20,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119690 states. [2021-12-07 00:59:21,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119690 to 114162. [2021-12-07 00:59:21,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114162 states, 114161 states have (on average 1.0630951025306365) internal successors, (121364), 114161 states have internal predecessors, (121364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:59:21,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114162 states to 114162 states and 121364 transitions. [2021-12-07 00:59:21,477 INFO L78 Accepts]: Start accepts. Automaton has 114162 states and 121364 transitions. Word has length 522 [2021-12-07 00:59:21,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:59:21,477 INFO L470 AbstractCegarLoop]: Abstraction has 114162 states and 121364 transitions. [2021-12-07 00:59:21,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:59:21,477 INFO L276 IsEmpty]: Start isEmpty. Operand 114162 states and 121364 transitions. [2021-12-07 00:59:21,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 545 [2021-12-07 00:59:21,488 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:59:21,488 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:59:21,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-07 00:59:21,489 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:59:21,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:59:21,489 INFO L85 PathProgramCache]: Analyzing trace with hash -2110531290, now seen corresponding path program 1 times [2021-12-07 00:59:21,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:59:21,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494874909] [2021-12-07 00:59:21,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:59:21,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:59:21,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:21,628 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 328 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-07 00:59:21,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:59:21,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494874909] [2021-12-07 00:59:21,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494874909] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:59:21,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:59:21,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:59:21,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515823905] [2021-12-07 00:59:21,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:59:21,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:59:21,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:59:21,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:59:21,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:59:21,630 INFO L87 Difference]: Start difference. First operand 114162 states and 121364 transitions. Second operand has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:59:24,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:59:24,040 INFO L93 Difference]: Finished difference Result 240696 states and 256051 transitions. [2021-12-07 00:59:24,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:59:24,041 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 544 [2021-12-07 00:59:24,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:59:24,169 INFO L225 Difference]: With dead ends: 240696 [2021-12-07 00:59:24,169 INFO L226 Difference]: Without dead ends: 126111 [2021-12-07 00:59:24,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:59:24,214 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 393 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1222 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 1408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 1222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-07 00:59:24,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 261 Invalid, 1408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 1222 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-07 00:59:24,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126111 states. [2021-12-07 00:59:25,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126111 to 123100. [2021-12-07 00:59:25,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123100 states, 123099 states have (on average 1.0629574570061495) internal successors, (130849), 123099 states have internal predecessors, (130849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:59:25,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123100 states to 123100 states and 130849 transitions. [2021-12-07 00:59:25,603 INFO L78 Accepts]: Start accepts. Automaton has 123100 states and 130849 transitions. Word has length 544 [2021-12-07 00:59:25,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:59:25,604 INFO L470 AbstractCegarLoop]: Abstraction has 123100 states and 130849 transitions. [2021-12-07 00:59:25,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:59:25,604 INFO L276 IsEmpty]: Start isEmpty. Operand 123100 states and 130849 transitions. [2021-12-07 00:59:25,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 550 [2021-12-07 00:59:25,614 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:59:25,615 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:59:25,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-07 00:59:25,615 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:59:25,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:59:25,615 INFO L85 PathProgramCache]: Analyzing trace with hash -372435095, now seen corresponding path program 1 times [2021-12-07 00:59:25,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:59:25,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972192451] [2021-12-07 00:59:25,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:59:25,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:59:25,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:25,754 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 333 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-07 00:59:25,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:59:25,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972192451] [2021-12-07 00:59:25,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972192451] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:59:25,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:59:25,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:59:25,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545417313] [2021-12-07 00:59:25,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:59:25,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:59:25,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:59:25,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:59:25,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:59:25,755 INFO L87 Difference]: Start difference. First operand 123100 states and 130849 transitions. Second operand has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:59:27,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:59:27,936 INFO L93 Difference]: Finished difference Result 250899 states and 266732 transitions. [2021-12-07 00:59:27,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:59:27,937 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 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 549 [2021-12-07 00:59:27,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:59:28,059 INFO L225 Difference]: With dead ends: 250899 [2021-12-07 00:59:28,059 INFO L226 Difference]: Without dead ends: 127376 [2021-12-07 00:59:28,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:59:28,108 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 397 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 1181 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 1368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 1181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:59:28,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [397 Valid, 254 Invalid, 1368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 1181 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-07 00:59:28,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127376 states. [2021-12-07 00:59:29,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127376 to 120970. [2021-12-07 00:59:29,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120970 states, 120969 states have (on average 1.0626441485008555) internal successors, (128547), 120969 states have internal predecessors, (128547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:59:29,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120970 states to 120970 states and 128547 transitions. [2021-12-07 00:59:29,458 INFO L78 Accepts]: Start accepts. Automaton has 120970 states and 128547 transitions. Word has length 549 [2021-12-07 00:59:29,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:59:29,459 INFO L470 AbstractCegarLoop]: Abstraction has 120970 states and 128547 transitions. [2021-12-07 00:59:29,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:59:29,459 INFO L276 IsEmpty]: Start isEmpty. Operand 120970 states and 128547 transitions. [2021-12-07 00:59:29,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 594 [2021-12-07 00:59:29,468 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:59:29,469 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, 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, 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] [2021-12-07 00:59:29,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-07 00:59:29,469 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:59:29,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:59:29,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1184107234, now seen corresponding path program 1 times [2021-12-07 00:59:29,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:59:29,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938437857] [2021-12-07 00:59:29,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:59:29,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:59:29,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:29,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 822 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-12-07 00:59:29,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:59:29,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938437857] [2021-12-07 00:59:29,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938437857] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:59:29,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:59:29,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:59:29,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717934442] [2021-12-07 00:59:29,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:59:29,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:59:29,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:59:29,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:59:29,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:59:29,744 INFO L87 Difference]: Start difference. First operand 120970 states and 128547 transitions. Second operand has 4 states, 4 states have (on average 109.75) internal successors, (439), 4 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:59:33,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:59:33,051 INFO L93 Difference]: Finished difference Result 269616 states and 286122 transitions. [2021-12-07 00:59:33,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:59:33,052 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 109.75) internal successors, (439), 4 states have internal predecessors, (439), 0 states have call successors, (0), 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 593 [2021-12-07 00:59:33,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:59:33,189 INFO L225 Difference]: With dead ends: 269616 [2021-12-07 00:59:33,189 INFO L226 Difference]: Without dead ends: 148648 [2021-12-07 00:59:33,227 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 [2021-12-07 00:59:33,227 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 724 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 2311 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 2750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 2311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-07 00:59:33,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [724 Valid, 226 Invalid, 2750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 2311 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-07 00:59:33,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148648 states. [2021-12-07 00:59:34,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148648 to 143115. [2021-12-07 00:59:34,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143115 states, 143114 states have (on average 1.059330324077309) internal successors, (151605), 143114 states have internal predecessors, (151605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:59:34,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143115 states to 143115 states and 151605 transitions. [2021-12-07 00:59:34,863 INFO L78 Accepts]: Start accepts. Automaton has 143115 states and 151605 transitions. Word has length 593 [2021-12-07 00:59:34,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:59:34,863 INFO L470 AbstractCegarLoop]: Abstraction has 143115 states and 151605 transitions. [2021-12-07 00:59:34,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 109.75) internal successors, (439), 4 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:59:34,864 INFO L276 IsEmpty]: Start isEmpty. Operand 143115 states and 151605 transitions. [2021-12-07 00:59:34,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 621 [2021-12-07 00:59:34,875 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:59:34,875 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, 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, 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, 2, 2, 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] [2021-12-07 00:59:34,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-07 00:59:34,875 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:59:34,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:59:34,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1377441512, now seen corresponding path program 1 times [2021-12-07 00:59:34,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:59:34,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487396756] [2021-12-07 00:59:34,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:59:34,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:59:34,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:35,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1118 backedges. 608 proven. 0 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2021-12-07 00:59:35,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:59:35,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487396756] [2021-12-07 00:59:35,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487396756] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:59:35,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:59:35,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:59:35,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557038266] [2021-12-07 00:59:35,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:59:35,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:59:35,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:59:35,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:59:35,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:59:35,111 INFO L87 Difference]: Start difference. First operand 143115 states and 151605 transitions. Second operand has 4 states, 4 states have (on average 85.5) internal successors, (342), 4 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:59:38,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:59:38,833 INFO L93 Difference]: Finished difference Result 301579 states and 319031 transitions. [2021-12-07 00:59:38,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:59:38,834 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 85.5) internal successors, (342), 4 states have internal predecessors, (342), 0 states have call successors, (0), 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 620 [2021-12-07 00:59:38,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:59:38,972 INFO L225 Difference]: With dead ends: 301579 [2021-12-07 00:59:38,972 INFO L226 Difference]: Without dead ends: 158466 [2021-12-07 00:59:39,011 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 [2021-12-07 00:59:39,012 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 805 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 2404 mSolverCounterSat, 367 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 805 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 2771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 367 IncrementalHoareTripleChecker+Valid, 2404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:59:39,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [805 Valid, 175 Invalid, 2771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [367 Valid, 2404 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-07 00:59:39,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158466 states. [2021-12-07 00:59:40,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158466 to 145245. [2021-12-07 00:59:40,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145245 states, 145244 states have (on average 1.059107433009281) internal successors, (153829), 145244 states have internal predecessors, (153829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:59:40,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145245 states to 145245 states and 153829 transitions. [2021-12-07 00:59:40,858 INFO L78 Accepts]: Start accepts. Automaton has 145245 states and 153829 transitions. Word has length 620 [2021-12-07 00:59:40,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:59:40,858 INFO L470 AbstractCegarLoop]: Abstraction has 145245 states and 153829 transitions. [2021-12-07 00:59:40,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.5) internal successors, (342), 4 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:59:40,858 INFO L276 IsEmpty]: Start isEmpty. Operand 145245 states and 153829 transitions. [2021-12-07 00:59:40,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 622 [2021-12-07 00:59:40,869 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:59:40,869 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, 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, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:59:40,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-07 00:59:40,869 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:59:40,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:59:40,870 INFO L85 PathProgramCache]: Analyzing trace with hash -281149052, now seen corresponding path program 1 times [2021-12-07 00:59:40,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:59:40,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930826926] [2021-12-07 00:59:40,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:59:40,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:59:40,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:41,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 833 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-12-07 00:59:41,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:59:41,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930826926] [2021-12-07 00:59:41,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930826926] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:59:41,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:59:41,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:59:41,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341324750] [2021-12-07 00:59:41,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:59:41,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:59:41,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:59:41,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:59:41,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:59:41,010 INFO L87 Difference]: Start difference. First operand 145245 states and 153829 transitions. Second operand has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:59:43,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:59:43,497 INFO L93 Difference]: Finished difference Result 298610 states and 316212 transitions. [2021-12-07 00:59:43,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:59:43,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 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 621 [2021-12-07 00:59:43,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:59:43,641 INFO L225 Difference]: With dead ends: 298610 [2021-12-07 00:59:43,641 INFO L226 Difference]: Without dead ends: 153367 [2021-12-07 00:59:43,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:59:43,680 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 416 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 1383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-07 00:59:43,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 239 Invalid, 1383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-07 00:59:43,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153367 states. [2021-12-07 00:59:45,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153367 to 143970. [2021-12-07 00:59:45,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143970 states, 143969 states have (on average 1.0592419201355847) internal successors, (152498), 143969 states have internal predecessors, (152498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:59:45,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143970 states to 143970 states and 152498 transitions. [2021-12-07 00:59:45,510 INFO L78 Accepts]: Start accepts. Automaton has 143970 states and 152498 transitions. Word has length 621 [2021-12-07 00:59:45,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:59:45,511 INFO L470 AbstractCegarLoop]: Abstraction has 143970 states and 152498 transitions. [2021-12-07 00:59:45,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:59:45,511 INFO L276 IsEmpty]: Start isEmpty. Operand 143970 states and 152498 transitions. [2021-12-07 00:59:45,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2021-12-07 00:59:45,529 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:59:45,529 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:59:45,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-07 00:59:45,530 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:59:45,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:59:45,530 INFO L85 PathProgramCache]: Analyzing trace with hash 394781504, now seen corresponding path program 1 times [2021-12-07 00:59:45,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:59:45,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387452802] [2021-12-07 00:59:45,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:59:45,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:59:45,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:45,693 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 203 proven. 0 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2021-12-07 00:59:45,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:59:45,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387452802] [2021-12-07 00:59:45,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387452802] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:59:45,693 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:59:45,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:59:45,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652576550] [2021-12-07 00:59:45,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:59:45,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:59:45,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:59:45,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:59:45,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:59:45,695 INFO L87 Difference]: Start difference. First operand 143970 states and 152498 transitions. Second operand has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:59:47,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:59:47,906 INFO L93 Difference]: Finished difference Result 280267 states and 296634 transitions. [2021-12-07 00:59:47,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:59:47,907 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 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 651 [2021-12-07 00:59:47,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:59:48,049 INFO L225 Difference]: With dead ends: 280267 [2021-12-07 00:59:48,049 INFO L226 Difference]: Without dead ends: 136724 [2021-12-07 00:59:48,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:59:48,100 INFO L933 BasicCegarLoop]: 638 mSDtfsCounter, 426 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 1255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:59:48,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 691 Invalid, 1255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1137 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-07 00:59:48,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136724 states. [2021-12-07 00:59:49,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136724 to 121807. [2021-12-07 00:59:49,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121807 states, 121806 states have (on average 1.0489302661609445) internal successors, (127766), 121806 states have internal predecessors, (127766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:59:49,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121807 states to 121807 states and 127766 transitions. [2021-12-07 00:59:49,692 INFO L78 Accepts]: Start accepts. Automaton has 121807 states and 127766 transitions. Word has length 651 [2021-12-07 00:59:49,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:59:49,693 INFO L470 AbstractCegarLoop]: Abstraction has 121807 states and 127766 transitions. [2021-12-07 00:59:49,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:59:49,693 INFO L276 IsEmpty]: Start isEmpty. Operand 121807 states and 127766 transitions. [2021-12-07 00:59:49,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 668 [2021-12-07 00:59:49,704 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:59:49,705 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-07 00:59:49,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-07 00:59:49,705 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:59:49,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:59:49,705 INFO L85 PathProgramCache]: Analyzing trace with hash -20605944, now seen corresponding path program 1 times [2021-12-07 00:59:49,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:59:49,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829486787] [2021-12-07 00:59:49,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:59:49,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:59:49,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:49,913 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 51 proven. 482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:59:49,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:59:49,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829486787] [2021-12-07 00:59:49,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829486787] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:59:49,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849974299] [2021-12-07 00:59:49,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:59:49,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:59:49,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:59:49,914 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:59:49,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-07 00:59:50,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:50,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-07 00:59:50,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:03:59,870 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 156 proven. 377 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:03:59,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:04:01,238 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 451 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-07 01:04:01,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849974299] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-07 01:04:01,238 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:04:01,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 6] total 11 [2021-12-07 01:04:01,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070756238] [2021-12-07 01:04:01,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:04:01,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:04:01,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:04:01,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:04:01,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-12-07 01:04:01,240 INFO L87 Difference]: Start difference. First operand 121807 states and 127766 transitions. Second operand has 3 states, 3 states have (on average 195.33333333333334) internal successors, (586), 3 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:04:03,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:04:03,325 INFO L93 Difference]: Finished difference Result 242765 states and 254578 transitions. [2021-12-07 01:04:03,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:04:03,326 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 195.33333333333334) internal successors, (586), 3 states have internal predecessors, (586), 0 states have call successors, (0), 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 667 [2021-12-07 01:04:03,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:04:03,434 INFO L225 Difference]: With dead ends: 242765 [2021-12-07 01:04:03,434 INFO L226 Difference]: Without dead ends: 121385 [2021-12-07 01:04:03,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1337 GetRequests, 1327 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-12-07 01:04:03,460 INFO L933 BasicCegarLoop]: 595 mSDtfsCounter, 284 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 1114 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:04:03,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 629 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1114 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-07 01:04:03,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121385 states. [2021-12-07 01:04:04,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121385 to 111599. [2021-12-07 01:04:04,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111599 states, 111598 states have (on average 1.0459506442767792) internal successors, (116726), 111598 states have internal predecessors, (116726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:04:04,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111599 states to 111599 states and 116726 transitions. [2021-12-07 01:04:04,615 INFO L78 Accepts]: Start accepts. Automaton has 111599 states and 116726 transitions. Word has length 667 [2021-12-07 01:04:04,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:04:04,616 INFO L470 AbstractCegarLoop]: Abstraction has 111599 states and 116726 transitions. [2021-12-07 01:04:04,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 195.33333333333334) internal successors, (586), 3 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:04:04,616 INFO L276 IsEmpty]: Start isEmpty. Operand 111599 states and 116726 transitions. [2021-12-07 01:04:04,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 686 [2021-12-07 01:04:04,627 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:04:04,628 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-07 01:04:04,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-07 01:04:04,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-07 01:04:04,830 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:04:04,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:04:04,831 INFO L85 PathProgramCache]: Analyzing trace with hash 899857782, now seen corresponding path program 1 times [2021-12-07 01:04:04,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:04:04,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566482183] [2021-12-07 01:04:04,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:04:04,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:04:04,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:04:05,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1217 backedges. 912 proven. 0 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2021-12-07 01:04:05,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:04:05,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566482183] [2021-12-07 01:04:05,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566482183] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:04:05,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:04:05,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:04:05,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404412704] [2021-12-07 01:04:05,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:04:05,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:04:05,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:04:05,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:04:05,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:04:05,043 INFO L87 Difference]: Start difference. First operand 111599 states and 116726 transitions. Second operand has 5 states, 5 states have (on average 92.8) internal successors, (464), 5 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:04:08,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:04:08,889 INFO L93 Difference]: Finished difference Result 244487 states and 255582 transitions. [2021-12-07 01:04:08,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:04:08,889 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 92.8) internal successors, (464), 5 states have internal predecessors, (464), 0 states have call successors, (0), 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 685 [2021-12-07 01:04:08,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:04:09,024 INFO L225 Difference]: With dead ends: 244487 [2021-12-07 01:04:09,024 INFO L226 Difference]: Without dead ends: 132890 [2021-12-07 01:04:09,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:04:09,075 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 1295 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 3223 mSolverCounterSat, 615 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1295 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 3838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 615 IncrementalHoareTripleChecker+Valid, 3223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:04:09,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1295 Valid, 187 Invalid, 3838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [615 Valid, 3223 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-12-07 01:04:09,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132890 states. [2021-12-07 01:04:10,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132890 to 111588. [2021-12-07 01:04:10,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111588 states, 111587 states have (on average 1.0412413632412378) internal successors, (116189), 111587 states have internal predecessors, (116189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:04:10,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111588 states to 111588 states and 116189 transitions. [2021-12-07 01:04:10,598 INFO L78 Accepts]: Start accepts. Automaton has 111588 states and 116189 transitions. Word has length 685 [2021-12-07 01:04:10,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:04:10,599 INFO L470 AbstractCegarLoop]: Abstraction has 111588 states and 116189 transitions. [2021-12-07 01:04:10,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 92.8) internal successors, (464), 5 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:04:10,599 INFO L276 IsEmpty]: Start isEmpty. Operand 111588 states and 116189 transitions. [2021-12-07 01:04:10,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 742 [2021-12-07 01:04:10,611 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:04:10,612 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:04:10,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-07 01:04:10,612 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:04:10,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:04:10,612 INFO L85 PathProgramCache]: Analyzing trace with hash 533039714, now seen corresponding path program 1 times [2021-12-07 01:04:10,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:04:10,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661689149] [2021-12-07 01:04:10,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:04:10,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:04:10,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:04:10,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1324 backedges. 722 proven. 0 refuted. 0 times theorem prover too weak. 602 trivial. 0 not checked. [2021-12-07 01:04:10,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:04:10,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661689149] [2021-12-07 01:04:10,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661689149] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:04:10,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:04:10,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:04:10,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977556801] [2021-12-07 01:04:10,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:04:10,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:04:10,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:04:10,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:04:10,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:04:10,817 INFO L87 Difference]: Start difference. First operand 111588 states and 116189 transitions. Second operand has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:04:14,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:04:14,327 INFO L93 Difference]: Finished difference Result 239358 states and 248955 transitions. [2021-12-07 01:04:14,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:04:14,327 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 741 [2021-12-07 01:04:14,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:04:14,437 INFO L225 Difference]: With dead ends: 239358 [2021-12-07 01:04:14,437 INFO L226 Difference]: Without dead ends: 128197 [2021-12-07 01:04:14,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:04:14,472 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 699 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 2769 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 3037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 2769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-07 01:04:14,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [699 Valid, 331 Invalid, 3037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 2769 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-07 01:04:14,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128197 states. [2021-12-07 01:04:15,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128197 to 127333. [2021-12-07 01:04:15,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127333 states, 127332 states have (on average 1.0381993528728048) internal successors, (132196), 127332 states have internal predecessors, (132196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:04:15,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127333 states to 127333 states and 132196 transitions. [2021-12-07 01:04:15,858 INFO L78 Accepts]: Start accepts. Automaton has 127333 states and 132196 transitions. Word has length 741 [2021-12-07 01:04:15,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:04:15,858 INFO L470 AbstractCegarLoop]: Abstraction has 127333 states and 132196 transitions. [2021-12-07 01:04:15,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:04:15,859 INFO L276 IsEmpty]: Start isEmpty. Operand 127333 states and 132196 transitions. [2021-12-07 01:04:15,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 743 [2021-12-07 01:04:15,874 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:04:15,874 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:04:15,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-07 01:04:15,874 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:04:15,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:04:15,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1574854455, now seen corresponding path program 1 times [2021-12-07 01:04:15,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:04:15,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134043927] [2021-12-07 01:04:15,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:04:15,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:04:16,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:04:16,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 771 proven. 0 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2021-12-07 01:04:16,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:04:16,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134043927] [2021-12-07 01:04:16,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134043927] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:04:16,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:04:16,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:04:16,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018535199] [2021-12-07 01:04:16,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:04:16,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:04:16,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:04:16,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:04:16,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:04:16,177 INFO L87 Difference]: Start difference. First operand 127333 states and 132196 transitions. Second operand has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:04:18,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:04:18,126 INFO L93 Difference]: Finished difference Result 254668 states and 264394 transitions. [2021-12-07 01:04:18,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:04:18,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 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 742 [2021-12-07 01:04:18,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:04:18,238 INFO L225 Difference]: With dead ends: 254668 [2021-12-07 01:04:18,238 INFO L226 Difference]: Without dead ends: 127762 [2021-12-07 01:04:18,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:04:18,274 INFO L933 BasicCegarLoop]: 727 mSDtfsCounter, 96 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1130 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:04:18,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 771 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1130 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-07 01:04:18,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127762 states. [2021-12-07 01:04:19,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127762 to 119251. [2021-12-07 01:04:19,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119251 states, 119250 states have (on average 1.0393207547169812) internal successors, (123939), 119250 states have internal predecessors, (123939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:04:19,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119251 states to 119251 states and 123939 transitions. [2021-12-07 01:04:19,662 INFO L78 Accepts]: Start accepts. Automaton has 119251 states and 123939 transitions. Word has length 742 [2021-12-07 01:04:19,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:04:19,662 INFO L470 AbstractCegarLoop]: Abstraction has 119251 states and 123939 transitions. [2021-12-07 01:04:19,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:04:19,663 INFO L276 IsEmpty]: Start isEmpty. Operand 119251 states and 123939 transitions. [2021-12-07 01:04:19,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 759 [2021-12-07 01:04:19,675 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:04:19,676 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, 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, 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] [2021-12-07 01:04:19,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-07 01:04:19,676 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:04:19,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:04:19,676 INFO L85 PathProgramCache]: Analyzing trace with hash 830048962, now seen corresponding path program 1 times [2021-12-07 01:04:19,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:04:19,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096246322] [2021-12-07 01:04:19,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:04:19,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:04:19,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:04:19,877 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 577 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-07 01:04:19,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:04:19,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096246322] [2021-12-07 01:04:19,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096246322] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:04:19,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:04:19,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:04:19,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363135381] [2021-12-07 01:04:19,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:04:19,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:04:19,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:04:19,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:04:19,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:04:19,879 INFO L87 Difference]: Start difference. First operand 119251 states and 123939 transitions. Second operand has 4 states, 4 states have (on average 149.0) internal successors, (596), 4 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:04:23,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:04:23,293 INFO L93 Difference]: Finished difference Result 250440 states and 260069 transitions. [2021-12-07 01:04:23,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:04:23,293 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 149.0) internal successors, (596), 4 states have internal predecessors, (596), 0 states have call successors, (0), 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 758 [2021-12-07 01:04:23,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:04:23,410 INFO L225 Difference]: With dead ends: 250440 [2021-12-07 01:04:23,410 INFO L226 Difference]: Without dead ends: 131191 [2021-12-07 01:04:23,453 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 [2021-12-07 01:04:23,454 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 698 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 2350 mSolverCounterSat, 355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 2705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 355 IncrementalHoareTripleChecker+Valid, 2350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-07 01:04:23,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [698 Valid, 120 Invalid, 2705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 2350 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-07 01:04:23,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131191 states. [2021-12-07 01:04:24,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131191 to 117972. [2021-12-07 01:04:24,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117972 states, 117971 states have (on average 1.0389332971662528) internal successors, (122564), 117971 states have internal predecessors, (122564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:04:24,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117972 states to 117972 states and 122564 transitions. [2021-12-07 01:04:24,890 INFO L78 Accepts]: Start accepts. Automaton has 117972 states and 122564 transitions. Word has length 758 [2021-12-07 01:04:24,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:04:24,891 INFO L470 AbstractCegarLoop]: Abstraction has 117972 states and 122564 transitions. [2021-12-07 01:04:24,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 149.0) internal successors, (596), 4 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:04:24,891 INFO L276 IsEmpty]: Start isEmpty. Operand 117972 states and 122564 transitions. [2021-12-07 01:04:24,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 798 [2021-12-07 01:04:24,906 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:04:24,906 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:04:24,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-07 01:04:24,907 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:04:24,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:04:24,907 INFO L85 PathProgramCache]: Analyzing trace with hash 122487100, now seen corresponding path program 1 times [2021-12-07 01:04:24,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:04:24,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105418928] [2021-12-07 01:04:24,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:04:24,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:04:24,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:04:25,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1294 backedges. 895 proven. 94 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2021-12-07 01:04:25,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:04:25,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105418928] [2021-12-07 01:04:25,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105418928] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:04:25,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560504112] [2021-12-07 01:04:25,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:04:25,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:04:25,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:04:25,128 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:04:25,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-07 01:04:25,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:04:25,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 01:04:25,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:04:25,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1294 backedges. 989 proven. 0 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2021-12-07 01:04:25,989 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:04:25,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560504112] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:04:25,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:04:25,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-12-07 01:04:25,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746528930] [2021-12-07 01:04:25,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:04:25,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:04:25,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:04:25,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:04:25,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-07 01:04:25,991 INFO L87 Difference]: Start difference. First operand 117972 states and 122564 transitions. Second operand has 5 states, 5 states have (on average 115.2) internal successors, (576), 5 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:04:30,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:04:30,656 INFO L93 Difference]: Finished difference Result 244885 states and 254232 transitions. [2021-12-07 01:04:30,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:04:30,656 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 115.2) internal successors, (576), 5 states have internal predecessors, (576), 0 states have call successors, (0), 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 797 [2021-12-07 01:04:30,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:04:30,771 INFO L225 Difference]: With dead ends: 244885 [2021-12-07 01:04:30,771 INFO L226 Difference]: Without dead ends: 127340 [2021-12-07 01:04:30,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 801 GetRequests, 795 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-07 01:04:30,819 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 1170 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 3264 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1170 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 3656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 3264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:04:30,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1170 Valid, 200 Invalid, 3656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 3264 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-12-07 01:04:30,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127340 states. [2021-12-07 01:04:31,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127340 to 117972. [2021-12-07 01:04:32,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117972 states, 117971 states have (on average 1.0388993905281807) internal successors, (122560), 117971 states have internal predecessors, (122560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:04:32,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117972 states to 117972 states and 122560 transitions. [2021-12-07 01:04:32,154 INFO L78 Accepts]: Start accepts. Automaton has 117972 states and 122560 transitions. Word has length 797 [2021-12-07 01:04:32,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:04:32,155 INFO L470 AbstractCegarLoop]: Abstraction has 117972 states and 122560 transitions. [2021-12-07 01:04:32,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 115.2) internal successors, (576), 5 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:04:32,155 INFO L276 IsEmpty]: Start isEmpty. Operand 117972 states and 122560 transitions. [2021-12-07 01:04:32,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 807 [2021-12-07 01:04:32,172 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:04:32,172 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:04:32,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-07 01:04:32,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:04:32,374 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:04:32,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:04:32,376 INFO L85 PathProgramCache]: Analyzing trace with hash -824098978, now seen corresponding path program 1 times [2021-12-07 01:04:32,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:04:32,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28404817] [2021-12-07 01:04:32,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:04:32,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:04:32,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:04:32,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1002 backedges. 908 proven. 43 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-07 01:04:32,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:04:32,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28404817] [2021-12-07 01:04:32,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28404817] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:04:32,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937676901] [2021-12-07 01:04:32,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:04:32,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:04:32,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:04:32,674 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:04:32,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-07 01:04:32,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:04:32,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 969 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-07 01:04:33,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:04:35,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1002 backedges. 619 proven. 332 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-07 01:04:35,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:04:37,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1002 backedges. 783 proven. 168 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-07 01:04:37,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937676901] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:04:37,921 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:04:37,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2021-12-07 01:04:37,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719484233] [2021-12-07 01:04:37,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:04:37,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-07 01:04:37,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:04:37,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-07 01:04:37,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-12-07 01:04:37,924 INFO L87 Difference]: Start difference. First operand 117972 states and 122560 transitions. Second operand has 16 states, 16 states have (on average 114.25) internal successors, (1828), 16 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:04:48,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:04:48,643 INFO L93 Difference]: Finished difference Result 221401 states and 229743 transitions. [2021-12-07 01:04:48,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-07 01:04:48,643 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 114.25) internal successors, (1828), 16 states have internal predecessors, (1828), 0 states have call successors, (0), 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 806 [2021-12-07 01:04:48,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:04:48,738 INFO L225 Difference]: With dead ends: 221401 [2021-12-07 01:04:48,738 INFO L226 Difference]: Without dead ends: 103856 [2021-12-07 01:04:48,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1650 GetRequests, 1619 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=260, Invalid=796, Unknown=0, NotChecked=0, Total=1056 [2021-12-07 01:04:48,779 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 8599 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 16760 mSolverCounterSat, 904 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8599 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 17664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 904 IncrementalHoareTripleChecker+Valid, 16760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2021-12-07 01:04:48,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8599 Valid, 444 Invalid, 17664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [904 Valid, 16760 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2021-12-07 01:04:48,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103856 states. [2021-12-07 01:04:49,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103856 to 72806. [2021-12-07 01:04:49,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72806 states, 72805 states have (on average 1.028748025547696) internal successors, (74898), 72805 states have internal predecessors, (74898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:04:49,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72806 states to 72806 states and 74898 transitions. [2021-12-07 01:04:49,689 INFO L78 Accepts]: Start accepts. Automaton has 72806 states and 74898 transitions. Word has length 806 [2021-12-07 01:04:49,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:04:49,690 INFO L470 AbstractCegarLoop]: Abstraction has 72806 states and 74898 transitions. [2021-12-07 01:04:49,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 114.25) internal successors, (1828), 16 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:04:49,690 INFO L276 IsEmpty]: Start isEmpty. Operand 72806 states and 74898 transitions. [2021-12-07 01:04:49,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 879 [2021-12-07 01:04:49,705 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:04:49,706 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 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, 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, 2, 2, 2, 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] [2021-12-07 01:04:49,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-07 01:04:49,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:04:49,909 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:04:49,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:04:49,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1700380421, now seen corresponding path program 1 times [2021-12-07 01:04:49,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:04:49,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159183688] [2021-12-07 01:04:49,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:04:49,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:04:50,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:04:50,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1720 backedges. 743 proven. 0 refuted. 0 times theorem prover too weak. 977 trivial. 0 not checked. [2021-12-07 01:04:50,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:04:50,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159183688] [2021-12-07 01:04:50,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159183688] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:04:50,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:04:50,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:04:50,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344753734] [2021-12-07 01:04:50,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:04:50,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:04:50,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:04:50,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:04:50,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:04:50,207 INFO L87 Difference]: Start difference. First operand 72806 states and 74898 transitions. Second operand has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:04:53,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:04:53,132 INFO L93 Difference]: Finished difference Result 157108 states and 161511 transitions. [2021-12-07 01:04:53,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:04:53,133 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 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 878 [2021-12-07 01:04:53,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:04:53,192 INFO L225 Difference]: With dead ends: 157108 [2021-12-07 01:04:53,192 INFO L226 Difference]: Without dead ends: 83879 [2021-12-07 01:04:53,209 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 [2021-12-07 01:04:53,209 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 786 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 2201 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 786 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 2484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 2201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:04:53,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [786 Valid, 133 Invalid, 2484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 2201 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-07 01:04:53,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83879 states. [2021-12-07 01:04:53,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83879 to 74931. [2021-12-07 01:04:53,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74931 states, 74930 states have (on average 1.0288269051114374) internal successors, (77090), 74930 states have internal predecessors, (77090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:04:53,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74931 states to 74931 states and 77090 transitions. [2021-12-07 01:04:53,958 INFO L78 Accepts]: Start accepts. Automaton has 74931 states and 77090 transitions. Word has length 878 [2021-12-07 01:04:53,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:04:53,959 INFO L470 AbstractCegarLoop]: Abstraction has 74931 states and 77090 transitions. [2021-12-07 01:04:53,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:04:53,959 INFO L276 IsEmpty]: Start isEmpty. Operand 74931 states and 77090 transitions. [2021-12-07 01:04:53,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 909 [2021-12-07 01:04:53,976 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:04:53,976 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-07 01:04:53,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-07 01:04:53,976 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:04:53,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:04:53,977 INFO L85 PathProgramCache]: Analyzing trace with hash 2008542277, now seen corresponding path program 1 times [2021-12-07 01:04:53,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:04:53,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147572043] [2021-12-07 01:04:53,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:04:53,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:04:54,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:04:54,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1899 backedges. 1692 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2021-12-07 01:04:54,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:04:54,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147572043] [2021-12-07 01:04:54,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147572043] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:04:54,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:04:54,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:04:54,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149842807] [2021-12-07 01:04:54,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:04:54,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:04:54,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:04:54,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:04:54,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:04:54,229 INFO L87 Difference]: Start difference. First operand 74931 states and 77090 transitions. Second operand has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:04:57,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:04:57,124 INFO L93 Difference]: Finished difference Result 166469 states and 171363 transitions. [2021-12-07 01:04:57,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:04:57,124 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 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 908 [2021-12-07 01:04:57,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:04:57,201 INFO L225 Difference]: With dead ends: 166469 [2021-12-07 01:04:57,201 INFO L226 Difference]: Without dead ends: 91540 [2021-12-07 01:04:57,232 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 [2021-12-07 01:04:57,233 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 628 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 2154 mSolverCounterSat, 364 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 2518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 364 IncrementalHoareTripleChecker+Valid, 2154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:04:57,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [628 Valid, 126 Invalid, 2518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [364 Valid, 2154 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-07 01:04:57,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91540 states. [2021-12-07 01:04:58,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91540 to 83873. [2021-12-07 01:04:58,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83873 states, 83872 states have (on average 1.0291157954979016) internal successors, (86314), 83872 states have internal predecessors, (86314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:04:58,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83873 states to 83873 states and 86314 transitions. [2021-12-07 01:04:58,183 INFO L78 Accepts]: Start accepts. Automaton has 83873 states and 86314 transitions. Word has length 908 [2021-12-07 01:04:58,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:04:58,183 INFO L470 AbstractCegarLoop]: Abstraction has 83873 states and 86314 transitions. [2021-12-07 01:04:58,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:04:58,184 INFO L276 IsEmpty]: Start isEmpty. Operand 83873 states and 86314 transitions. [2021-12-07 01:04:58,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 933 [2021-12-07 01:04:58,200 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:04:58,201 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 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, 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, 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] [2021-12-07 01:04:58,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-07 01:04:58,201 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:04:58,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:04:58,202 INFO L85 PathProgramCache]: Analyzing trace with hash -707522446, now seen corresponding path program 1 times [2021-12-07 01:04:58,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:04:58,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112602757] [2021-12-07 01:04:58,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:04:58,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:04:58,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:04:58,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1781 backedges. 1264 proven. 0 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2021-12-07 01:04:58,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:04:58,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112602757] [2021-12-07 01:04:58,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112602757] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:04:58,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:04:58,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:04:58,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879057415] [2021-12-07 01:04:58,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:04:58,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:04:58,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:04:58,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:04:58,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:04:58,402 INFO L87 Difference]: Start difference. First operand 83873 states and 86314 transitions. Second operand has 4 states, 4 states have (on average 138.0) internal successors, (552), 4 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:05:00,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:05:00,917 INFO L93 Difference]: Finished difference Result 174990 states and 179991 transitions. [2021-12-07 01:05:00,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:05:00,918 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 138.0) internal successors, (552), 4 states have internal predecessors, (552), 0 states have call successors, (0), 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 932 [2021-12-07 01:05:00,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:05:00,991 INFO L225 Difference]: With dead ends: 174990 [2021-12-07 01:05:00,991 INFO L226 Difference]: Without dead ends: 90694 [2021-12-07 01:05:01,027 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 [2021-12-07 01:05:01,027 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 854 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 2097 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 854 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 2334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 2097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:05:01,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [854 Valid, 183 Invalid, 2334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 2097 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-07 01:05:01,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90694 states. [2021-12-07 01:05:01,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90694 to 80038. [2021-12-07 01:05:01,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80038 states, 80037 states have (on average 1.027287379586941) internal successors, (82221), 80037 states have internal predecessors, (82221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:05:02,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80038 states to 80038 states and 82221 transitions. [2021-12-07 01:05:02,035 INFO L78 Accepts]: Start accepts. Automaton has 80038 states and 82221 transitions. Word has length 932 [2021-12-07 01:05:02,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:05:02,036 INFO L470 AbstractCegarLoop]: Abstraction has 80038 states and 82221 transitions. [2021-12-07 01:05:02,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 138.0) internal successors, (552), 4 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:05:02,036 INFO L276 IsEmpty]: Start isEmpty. Operand 80038 states and 82221 transitions. [2021-12-07 01:05:02,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 940 [2021-12-07 01:05:02,052 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:05:02,052 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:05:02,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-07 01:05:02,053 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:05:02,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:05:02,053 INFO L85 PathProgramCache]: Analyzing trace with hash -450067721, now seen corresponding path program 1 times [2021-12-07 01:05:02,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:05:02,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261995590] [2021-12-07 01:05:02,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:05:02,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:05:02,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:05:02,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1768 backedges. 778 proven. 0 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2021-12-07 01:05:02,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:05:02,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261995590] [2021-12-07 01:05:02,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261995590] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:05:02,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:05:02,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:05:02,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834021395] [2021-12-07 01:05:02,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:05:02,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:05:02,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:05:02,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:05:02,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:05:02,316 INFO L87 Difference]: Start difference. First operand 80038 states and 82221 transitions. Second operand has 4 states, 4 states have (on average 119.5) internal successors, (478), 4 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:05:05,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:05:05,215 INFO L93 Difference]: Finished difference Result 85591 states and 87829 transitions. [2021-12-07 01:05:05,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:05:05,215 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 119.5) internal successors, (478), 4 states have internal predecessors, (478), 0 states have call successors, (0), 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 939 [2021-12-07 01:05:05,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:05:05,281 INFO L225 Difference]: With dead ends: 85591 [2021-12-07 01:05:05,281 INFO L226 Difference]: Without dead ends: 85164 [2021-12-07 01:05:05,298 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 [2021-12-07 01:05:05,298 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 787 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 2202 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 2521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 2202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:05:05,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [787 Valid, 94 Invalid, 2521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 2202 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-07 01:05:05,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85164 states. [2021-12-07 01:05:06,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85164 to 79188. [2021-12-07 01:05:06,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79188 states, 79187 states have (on average 1.0271256645661535) internal successors, (81335), 79187 states have internal predecessors, (81335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:05:06,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79188 states to 79188 states and 81335 transitions. [2021-12-07 01:05:06,199 INFO L78 Accepts]: Start accepts. Automaton has 79188 states and 81335 transitions. Word has length 939 [2021-12-07 01:05:06,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:05:06,199 INFO L470 AbstractCegarLoop]: Abstraction has 79188 states and 81335 transitions. [2021-12-07 01:05:06,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 119.5) internal successors, (478), 4 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:05:06,200 INFO L276 IsEmpty]: Start isEmpty. Operand 79188 states and 81335 transitions. [2021-12-07 01:05:06,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1002 [2021-12-07 01:05:06,218 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:05:06,219 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:05:06,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-07 01:05:06,219 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:05:06,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:05:06,219 INFO L85 PathProgramCache]: Analyzing trace with hash 637808329, now seen corresponding path program 1 times [2021-12-07 01:05:06,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:05:06,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882707079] [2021-12-07 01:05:06,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:05:06,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:05:06,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:05:06,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1966 backedges. 1551 proven. 186 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-12-07 01:05:06,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:05:06,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882707079] [2021-12-07 01:05:06,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882707079] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:05:06,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502546155] [2021-12-07 01:05:06,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:05:06,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:05:06,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:05:06,525 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:05:06,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-07 01:05:06,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:05:06,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 1213 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-07 01:05:06,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:05:11,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1966 backedges. 502 proven. 919 refuted. 0 times theorem prover too weak. 545 trivial. 0 not checked. [2021-12-07 01:05:11,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:05:11,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1966 backedges. 989 proven. 0 refuted. 0 times theorem prover too weak. 977 trivial. 0 not checked. [2021-12-07 01:05:11,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502546155] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-07 01:05:11,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:05:11,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 6] total 11 [2021-12-07 01:05:11,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007628939] [2021-12-07 01:05:11,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:05:11,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:05:11,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:05:11,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:05:11,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-12-07 01:05:11,885 INFO L87 Difference]: Start difference. First operand 79188 states and 81335 transitions. Second operand has 4 states, 4 states have (on average 134.5) internal successors, (538), 4 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:05:14,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:05:14,683 INFO L93 Difference]: Finished difference Result 161792 states and 166115 transitions. [2021-12-07 01:05:14,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:05:14,684 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 134.5) internal successors, (538), 4 states have internal predecessors, (538), 0 states have call successors, (0), 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 1001 [2021-12-07 01:05:14,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:05:14,760 INFO L225 Difference]: With dead ends: 161792 [2021-12-07 01:05:14,760 INFO L226 Difference]: Without dead ends: 82181 [2021-12-07 01:05:14,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2005 GetRequests, 1996 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-12-07 01:05:14,804 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 956 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1611 mSolverCounterSat, 492 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 956 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 2103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 492 IncrementalHoareTripleChecker+Valid, 1611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:05:14,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [956 Valid, 60 Invalid, 2103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [492 Valid, 1611 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-07 01:05:14,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82181 states. [2021-12-07 01:05:15,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82181 to 77063. [2021-12-07 01:05:15,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77063 states, 77062 states have (on average 1.027146972567543) internal successors, (79154), 77062 states have internal predecessors, (79154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:05:15,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77063 states to 77063 states and 79154 transitions. [2021-12-07 01:05:15,631 INFO L78 Accepts]: Start accepts. Automaton has 77063 states and 79154 transitions. Word has length 1001 [2021-12-07 01:05:15,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:05:15,632 INFO L470 AbstractCegarLoop]: Abstraction has 77063 states and 79154 transitions. [2021-12-07 01:05:15,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 134.5) internal successors, (538), 4 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:05:15,632 INFO L276 IsEmpty]: Start isEmpty. Operand 77063 states and 79154 transitions. [2021-12-07 01:05:15,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1129 [2021-12-07 01:05:15,659 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:05:15,659 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:05:15,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-07 01:05:15,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-07 01:05:15,861 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:05:15,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:05:15,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1095567925, now seen corresponding path program 1 times [2021-12-07 01:05:15,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:05:15,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093309769] [2021-12-07 01:05:15,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:05:15,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:05:16,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:05:16,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2639 backedges. 2063 proven. 0 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-12-07 01:05:16,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:05:16,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093309769] [2021-12-07 01:05:16,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093309769] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:05:16,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:05:16,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:05:16,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043246656] [2021-12-07 01:05:16,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:05:16,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:05:16,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:05:16,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:05:16,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:05:16,232 INFO L87 Difference]: Start difference. First operand 77063 states and 79154 transitions. Second operand has 5 states, 5 states have (on average 159.0) internal successors, (795), 5 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:05:20,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:05:20,297 INFO L93 Difference]: Finished difference Result 174555 states and 179123 transitions. [2021-12-07 01:05:20,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 01:05:20,297 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 159.0) internal successors, (795), 5 states have internal predecessors, (795), 0 states have call successors, (0), 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 1128 [2021-12-07 01:05:20,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:05:20,376 INFO L225 Difference]: With dead ends: 174555 [2021-12-07 01:05:20,376 INFO L226 Difference]: Without dead ends: 97494 [2021-12-07 01:05:20,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:05:20,405 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 1607 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 3627 mSolverCounterSat, 479 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1607 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 4106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 3627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:05:20,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1607 Valid, 146 Invalid, 4106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [479 Valid, 3627 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-12-07 01:05:20,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97494 states. [2021-12-07 01:05:21,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97494 to 77917. [2021-12-07 01:05:21,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77917 states, 77916 states have (on average 1.0259895271831203) internal successors, (79941), 77916 states have internal predecessors, (79941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:05:21,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77917 states to 77917 states and 79941 transitions. [2021-12-07 01:05:21,316 INFO L78 Accepts]: Start accepts. Automaton has 77917 states and 79941 transitions. Word has length 1128 [2021-12-07 01:05:21,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:05:21,317 INFO L470 AbstractCegarLoop]: Abstraction has 77917 states and 79941 transitions. [2021-12-07 01:05:21,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 159.0) internal successors, (795), 5 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:05:21,317 INFO L276 IsEmpty]: Start isEmpty. Operand 77917 states and 79941 transitions. [2021-12-07 01:05:21,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1159 [2021-12-07 01:05:21,345 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:05:21,346 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:05:21,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-07 01:05:21,346 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:05:21,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:05:21,347 INFO L85 PathProgramCache]: Analyzing trace with hash -191057927, now seen corresponding path program 1 times [2021-12-07 01:05:21,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:05:21,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596842469] [2021-12-07 01:05:21,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:05:21,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:05:21,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:05:21,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2076 backedges. 1086 proven. 0 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2021-12-07 01:05:21,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:05:21,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596842469] [2021-12-07 01:05:21,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596842469] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:05:21,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:05:21,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:05:21,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907863241] [2021-12-07 01:05:21,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:05:21,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:05:21,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:05:21,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:05:21,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:05:21,688 INFO L87 Difference]: Start difference. First operand 77917 states and 79941 transitions. Second operand has 4 states, 4 states have (on average 174.25) internal successors, (697), 4 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:05:24,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:05:24,547 INFO L93 Difference]: Finished difference Result 162658 states and 166788 transitions. [2021-12-07 01:05:24,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:05:24,548 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 174.25) internal successors, (697), 4 states have internal predecessors, (697), 0 states have call successors, (0), 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 1158 [2021-12-07 01:05:24,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:05:24,616 INFO L225 Difference]: With dead ends: 162658 [2021-12-07 01:05:24,616 INFO L226 Difference]: Without dead ends: 84318 [2021-12-07 01:05:24,647 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 [2021-12-07 01:05:24,648 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 568 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 2184 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 2505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 2184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:05:24,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [568 Valid, 89 Invalid, 2505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 2184 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-07 01:05:24,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84318 states. [2021-12-07 01:05:25,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84318 to 75792. [2021-12-07 01:05:25,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75792 states, 75791 states have (on average 1.026005726273568) internal successors, (77762), 75791 states have internal predecessors, (77762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:05:25,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75792 states to 75792 states and 77762 transitions. [2021-12-07 01:05:25,495 INFO L78 Accepts]: Start accepts. Automaton has 75792 states and 77762 transitions. Word has length 1158 [2021-12-07 01:05:25,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:05:25,496 INFO L470 AbstractCegarLoop]: Abstraction has 75792 states and 77762 transitions. [2021-12-07 01:05:25,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 174.25) internal successors, (697), 4 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:05:25,496 INFO L276 IsEmpty]: Start isEmpty. Operand 75792 states and 77762 transitions. [2021-12-07 01:05:25,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1271 [2021-12-07 01:05:25,668 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:05:25,668 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:05:25,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-07 01:05:25,669 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:05:25,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:05:25,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1693685671, now seen corresponding path program 1 times [2021-12-07 01:05:25,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:05:25,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283093032] [2021-12-07 01:05:25,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:05:25,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:05:25,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:05:26,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3127 backedges. 1719 proven. 94 refuted. 0 times theorem prover too weak. 1314 trivial. 0 not checked. [2021-12-07 01:05:26,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:05:26,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283093032] [2021-12-07 01:05:26,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283093032] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:05:26,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016327784] [2021-12-07 01:05:26,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:05:26,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:05:26,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:05:26,050 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:05:26,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-07 01:05:26,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:05:26,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 1533 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 01:05:26,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:05:27,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3127 backedges. 1009 proven. 0 refuted. 0 times theorem prover too weak. 2118 trivial. 0 not checked. [2021-12-07 01:05:27,061 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:05:27,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016327784] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:05:27,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:05:27,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-12-07 01:05:27,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096177358] [2021-12-07 01:05:27,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:05:27,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:05:27,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:05:27,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:05:27,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-12-07 01:05:27,063 INFO L87 Difference]: Start difference. First operand 75792 states and 77762 transitions. Second operand has 5 states, 5 states have (on average 94.4) internal successors, (472), 5 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:05:31,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:05:31,000 INFO L93 Difference]: Finished difference Result 165645 states and 169768 transitions. [2021-12-07 01:05:31,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:05:31,001 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 94.4) internal successors, (472), 5 states have internal predecessors, (472), 0 states have call successors, (0), 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 1270 [2021-12-07 01:05:31,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:05:31,077 INFO L225 Difference]: With dead ends: 165645 [2021-12-07 01:05:31,077 INFO L226 Difference]: Without dead ends: 89005 [2021-12-07 01:05:31,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1274 GetRequests, 1268 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-12-07 01:05:31,111 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 1204 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 3358 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1204 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 3546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 3358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:05:31,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1204 Valid, 244 Invalid, 3546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 3358 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-12-07 01:05:31,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89005 states. [2021-12-07 01:05:31,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89005 to 75363. [2021-12-07 01:05:31,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75363 states, 75362 states have (on average 1.0256893394548976) internal successors, (77298), 75362 states have internal predecessors, (77298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:05:32,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75363 states to 75363 states and 77298 transitions. [2021-12-07 01:05:32,068 INFO L78 Accepts]: Start accepts. Automaton has 75363 states and 77298 transitions. Word has length 1270 [2021-12-07 01:05:32,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:05:32,069 INFO L470 AbstractCegarLoop]: Abstraction has 75363 states and 77298 transitions. [2021-12-07 01:05:32,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 94.4) internal successors, (472), 5 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:05:32,069 INFO L276 IsEmpty]: Start isEmpty. Operand 75363 states and 77298 transitions. [2021-12-07 01:05:32,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1402 [2021-12-07 01:05:32,107 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:05:32,108 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-07 01:05:32,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-07 01:05:32,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7419efe-4dee-4201-8f3a-98232e3abdf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-07 01:05:32,310 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:05:32,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:05:32,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1086112278, now seen corresponding path program 1 times [2021-12-07 01:05:32,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:05:32,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730076440] [2021-12-07 01:05:32,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:05:32,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:05:32,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:05:32,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 2303 proven. 0 refuted. 0 times theorem prover too weak. 897 trivial. 0 not checked. [2021-12-07 01:05:32,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:05:32,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730076440] [2021-12-07 01:05:32,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730076440] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:05:32,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:05:32,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:05:32,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037097776] [2021-12-07 01:05:32,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:05:32,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:05:32,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:05:32,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:05:32,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:05:32,691 INFO L87 Difference]: Start difference. First operand 75363 states and 77298 transitions. Second operand has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:05:35,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:05:35,359 INFO L93 Difference]: Finished difference Result 155844 states and 159804 transitions. [2021-12-07 01:05:35,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:05:35,359 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 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 1401 [2021-12-07 01:05:35,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:05:35,418 INFO L225 Difference]: With dead ends: 155844 [2021-12-07 01:05:35,418 INFO L226 Difference]: Without dead ends: 80483 [2021-12-07 01:05:35,432 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 [2021-12-07 01:05:35,433 INFO L933 BasicCegarLoop]: 573 mSDtfsCounter, 568 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 2642 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 2744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:05:35,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [568 Valid, 643 Invalid, 2744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2642 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-07 01:05:35,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80483 states. [2021-12-07 01:05:36,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80483 to 74938. [2021-12-07 01:05:36,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74938 states, 74937 states have (on average 1.0257416229632892) internal successors, (76866), 74937 states have internal predecessors, (76866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:05:36,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74938 states to 74938 states and 76866 transitions. [2021-12-07 01:05:36,232 INFO L78 Accepts]: Start accepts. Automaton has 74938 states and 76866 transitions. Word has length 1401 [2021-12-07 01:05:36,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:05:36,232 INFO L470 AbstractCegarLoop]: Abstraction has 74938 states and 76866 transitions. [2021-12-07 01:05:36,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:05:36,233 INFO L276 IsEmpty]: Start isEmpty. Operand 74938 states and 76866 transitions. [2021-12-07 01:05:36,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1443 [2021-12-07 01:05:36,270 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:05:36,271 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-07 01:05:36,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-07 01:05:36,271 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:05:36,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:05:36,272 INFO L85 PathProgramCache]: Analyzing trace with hash 792962286, now seen corresponding path program 1 times [2021-12-07 01:05:36,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:05:36,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019333736] [2021-12-07 01:05:36,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:05:36,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:05:36,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:05:36,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2872 backedges. 1844 proven. 0 refuted. 0 times theorem prover too weak. 1028 trivial. 0 not checked. [2021-12-07 01:05:36,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:05:36,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019333736] [2021-12-07 01:05:36,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019333736] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:05:36,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:05:36,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:05:36,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992558868] [2021-12-07 01:05:36,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:05:36,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:05:36,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:05:36,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:05:36,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:05:36,766 INFO L87 Difference]: Start difference. First operand 74938 states and 76866 transitions. Second operand has 3 states, 3 states have (on average 309.6666666666667) internal successors, (929), 3 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:05:38,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:05:38,594 INFO L93 Difference]: Finished difference Result 151150 states and 155047 transitions. [2021-12-07 01:05:38,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:05:38,595 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 309.6666666666667) internal successors, (929), 3 states have internal predecessors, (929), 0 states have call successors, (0), 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 1442 [2021-12-07 01:05:38,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:05:38,654 INFO L225 Difference]: With dead ends: 151150 [2021-12-07 01:05:38,655 INFO L226 Difference]: Without dead ends: 76214 [2021-12-07 01:05:38,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:05:38,679 INFO L933 BasicCegarLoop]: 660 mSDtfsCounter, 51 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1065 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:05:38,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 703 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1065 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-07 01:05:38,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76214 states. [2021-12-07 01:05:39,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76214 to 76213. [2021-12-07 01:05:39,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76213 states, 76212 states have (on average 1.0256258856872933) internal successors, (78165), 76212 states have internal predecessors, (78165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:05:39,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76213 states to 76213 states and 78165 transitions. [2021-12-07 01:05:39,471 INFO L78 Accepts]: Start accepts. Automaton has 76213 states and 78165 transitions. Word has length 1442 [2021-12-07 01:05:39,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:05:39,472 INFO L470 AbstractCegarLoop]: Abstraction has 76213 states and 78165 transitions. [2021-12-07 01:05:39,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 309.6666666666667) internal successors, (929), 3 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:05:39,473 INFO L276 IsEmpty]: Start isEmpty. Operand 76213 states and 78165 transitions. [2021-12-07 01:05:39,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1491 [2021-12-07 01:05:39,521 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:05:39,522 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-07 01:05:39,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-12-07 01:05:39,522 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:05:39,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:05:39,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1503800742, now seen corresponding path program 1 times [2021-12-07 01:05:39,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:05:39,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120876811] [2021-12-07 01:05:39,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:05:39,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:05:39,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:05:40,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3963 backedges. 2668 proven. 0 refuted. 0 times theorem prover too weak. 1295 trivial. 0 not checked. [2021-12-07 01:05:40,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:05:40,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120876811] [2021-12-07 01:05:40,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120876811] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:05:40,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:05:40,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:05:40,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367558971] [2021-12-07 01:05:40,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:05:40,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:05:40,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:05:40,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:05:40,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:05:40,012 INFO L87 Difference]: Start difference. First operand 76213 states and 78165 transitions. Second operand has 3 states, 3 states have (on average 267.3333333333333) internal successors, (802), 3 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:05:41,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:05:41,979 INFO L93 Difference]: Finished difference Result 147737 states and 151475 transitions. [2021-12-07 01:05:41,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:05:41,980 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 267.3333333333333) internal successors, (802), 3 states have internal predecessors, (802), 0 states have call successors, (0), 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 1490 [2021-12-07 01:05:41,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:05:42,042 INFO L225 Difference]: With dead ends: 147737 [2021-12-07 01:05:42,042 INFO L226 Difference]: Without dead ends: 71526 [2021-12-07 01:05:42,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:05:42,065 INFO L933 BasicCegarLoop]: 619 mSDtfsCounter, 85 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 1066 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:05:42,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 652 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1066 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-07 01:05:42,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71526 states. [2021-12-07 01:05:42,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71526 to 65995. [2021-12-07 01:05:42,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65995 states, 65994 states have (on average 1.0234112192017457) internal successors, (67539), 65994 states have internal predecessors, (67539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:05:42,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65995 states to 65995 states and 67539 transitions. [2021-12-07 01:05:42,784 INFO L78 Accepts]: Start accepts. Automaton has 65995 states and 67539 transitions. Word has length 1490 [2021-12-07 01:05:42,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:05:42,785 INFO L470 AbstractCegarLoop]: Abstraction has 65995 states and 67539 transitions. [2021-12-07 01:05:42,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 267.3333333333333) internal successors, (802), 3 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:05:42,785 INFO L276 IsEmpty]: Start isEmpty. Operand 65995 states and 67539 transitions. [2021-12-07 01:05:42,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1528 [2021-12-07 01:05:42,825 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:05:42,826 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:05:42,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-12-07 01:05:42,826 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:05:42,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:05:42,827 INFO L85 PathProgramCache]: Analyzing trace with hash -275382108, now seen corresponding path program 1 times [2021-12-07 01:05:42,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:05:42,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583972545] [2021-12-07 01:05:42,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:05:42,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:05:42,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:05:43,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 3017 proven. 0 refuted. 0 times theorem prover too weak. 1472 trivial. 0 not checked. [2021-12-07 01:05:43,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:05:43,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583972545] [2021-12-07 01:05:43,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583972545] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:05:43,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:05:43,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:05:43,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046126007] [2021-12-07 01:05:43,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:05:43,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:05:43,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:05:43,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:05:43,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:05:43,315 INFO L87 Difference]: Start difference. First operand 65995 states and 67539 transitions. Second operand has 5 states, 5 states have (on average 189.6) internal successors, (948), 5 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:05:46,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:05:46,904 INFO L93 Difference]: Finished difference Result 140080 states and 143224 transitions. [2021-12-07 01:05:46,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 01:05:46,905 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 189.6) internal successors, (948), 5 states have internal predecessors, (948), 0 states have call successors, (0), 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 1527 [2021-12-07 01:05:46,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:05:46,970 INFO L225 Difference]: With dead ends: 140080 [2021-12-07 01:05:46,970 INFO L226 Difference]: Without dead ends: 74087 [2021-12-07 01:05:47,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:05:47,003 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 1452 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 3574 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1452 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 3953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 3574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:05:47,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1452 Valid, 139 Invalid, 3953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 3574 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-07 01:05:47,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74087 states. [2021-12-07 01:05:47,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74087 to 57904. [2021-12-07 01:05:47,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57904 states, 57903 states have (on average 1.0199816935219246) internal successors, (59060), 57903 states have internal predecessors, (59060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:05:47,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57904 states to 57904 states and 59060 transitions. [2021-12-07 01:05:47,724 INFO L78 Accepts]: Start accepts. Automaton has 57904 states and 59060 transitions. Word has length 1527 [2021-12-07 01:05:47,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:05:47,726 INFO L470 AbstractCegarLoop]: Abstraction has 57904 states and 59060 transitions. [2021-12-07 01:05:47,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 189.6) internal successors, (948), 5 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:05:47,726 INFO L276 IsEmpty]: Start isEmpty. Operand 57904 states and 59060 transitions. [2021-12-07 01:05:47,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1562 [2021-12-07 01:05:47,764 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:05:47,765 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:05:47,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-12-07 01:05:47,765 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:05:47,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:05:47,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1387358191, now seen corresponding path program 1 times [2021-12-07 01:05:47,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:05:47,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999619320] [2021-12-07 01:05:47,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:05:47,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:05:47,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:05:48,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3507 backedges. 2836 proven. 0 refuted. 0 times theorem prover too weak. 671 trivial. 0 not checked. [2021-12-07 01:05:48,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:05:48,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999619320] [2021-12-07 01:05:48,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999619320] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:05:48,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:05:48,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-07 01:05:48,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181475169] [2021-12-07 01:05:48,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:05:48,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 01:05:48,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:05:48,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 01:05:48,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:05:48,288 INFO L87 Difference]: Start difference. First operand 57904 states and 59060 transitions. Second operand has 6 states, 6 states have (on average 162.66666666666666) internal successors, (976), 6 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:05:52,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:05:52,508 INFO L93 Difference]: Finished difference Result 117501 states and 119803 transitions. [2021-12-07 01:05:52,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 01:05:52,508 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 162.66666666666666) internal successors, (976), 6 states have internal predecessors, (976), 0 states have call successors, (0), 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 1561 [2021-12-07 01:05:52,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:05:52,510 INFO L225 Difference]: With dead ends: 117501 [2021-12-07 01:05:52,510 INFO L226 Difference]: Without dead ends: 0 [2021-12-07 01:05:52,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-12-07 01:05:52,537 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 2087 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 5240 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2087 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 5632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 5240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-12-07 01:05:52,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2087 Valid, 125 Invalid, 5632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 5240 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-12-07 01:05:52,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-07 01:05:52,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-07 01:05:52,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:05:52,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-07 01:05:52,538 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1561 [2021-12-07 01:05:52,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:05:52,538 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-07 01:05:52,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 162.66666666666666) internal successors, (976), 6 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:05:52,538 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-07 01:05:52,538 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-07 01:05:52,540 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-07 01:05:52,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-12-07 01:05:52,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.