./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/nested_delay_notd2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/nested_delay_notd2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD --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 a8791b6973aa1a0d5421161a634fa2e6c3276aa5fd05ed6d81de7a2762aa206a ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................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Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 23:06:31,757 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 23:06:31,760 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 23:06:31,824 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 23:06:31,825 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 23:06:31,831 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 23:06:31,834 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 23:06:31,840 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 23:06:31,844 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 23:06:31,854 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 23:06:31,856 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 23:06:31,858 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 23:06:31,859 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 23:06:31,863 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 23:06:31,865 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 23:06:31,873 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 23:06:31,874 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 23:06:31,876 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 23:06:31,879 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 23:06:31,885 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 23:06:31,890 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 23:06:31,892 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 23:06:31,896 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 23:06:31,898 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 23:06:31,906 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 23:06:31,907 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 23:06:31,907 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 23:06:31,910 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 23:06:31,911 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 23:06:31,913 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 23:06:31,914 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 23:06:31,915 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 23:06:31,918 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 23:06:31,920 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 23:06:31,922 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 23:06:31,923 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 23:06:31,924 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 23:06:31,924 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 23:06:31,924 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 23:06:31,926 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 23:06:31,927 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 23:06:31,928 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 23:06:31,984 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 23:06:31,985 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 23:06:31,986 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 23:06:31,986 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 23:06:31,995 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 23:06:31,996 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 23:06:31,996 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 23:06:31,997 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 23:06:31,997 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 23:06:31,997 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 23:06:31,999 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 23:06:31,999 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 23:06:32,000 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 23:06:32,000 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 23:06:32,000 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 23:06:32,000 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 23:06:32,001 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 23:06:32,001 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 23:06:32,001 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 23:06:32,002 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 23:06:32,002 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 23:06:32,002 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 23:06:32,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:06:32,003 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 23:06:32,003 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 23:06:32,003 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 23:06:32,004 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 23:06:32,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 23:06:32,004 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 23:06:32,004 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 23:06:32,005 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 23:06:32,005 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 23:06:32,006 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_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8791b6973aa1a0d5421161a634fa2e6c3276aa5fd05ed6d81de7a2762aa206a [2021-10-28 23:06:32,369 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 23:06:32,404 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 23:06:32,408 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 23:06:32,409 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 23:06:32,410 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 23:06:32,412 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/loops-crafted-1/nested_delay_notd2.c [2021-10-28 23:06:32,496 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/data/ecc7660e6/4dbdaf84ddbb4ed1893d41b339b535fc/FLAG71f3de7da [2021-10-28 23:06:33,071 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 23:06:33,071 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/sv-benchmarks/c/loops-crafted-1/nested_delay_notd2.c [2021-10-28 23:06:33,079 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/data/ecc7660e6/4dbdaf84ddbb4ed1893d41b339b535fc/FLAG71f3de7da [2021-10-28 23:06:33,370 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/data/ecc7660e6/4dbdaf84ddbb4ed1893d41b339b535fc [2021-10-28 23:06:33,372 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 23:06:33,374 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 23:06:33,376 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 23:06:33,377 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 23:06:33,381 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 23:06:33,382 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:06:33" (1/1) ... [2021-10-28 23:06:33,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58f2f4d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:06:33, skipping insertion in model container [2021-10-28 23:06:33,384 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:06:33" (1/1) ... [2021-10-28 23:06:33,400 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 23:06:33,421 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 23:06:33,645 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/sv-benchmarks/c/loops-crafted-1/nested_delay_notd2.c[468,481] [2021-10-28 23:06:33,684 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:06:33,702 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 23:06:33,723 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/sv-benchmarks/c/loops-crafted-1/nested_delay_notd2.c[468,481] [2021-10-28 23:06:33,747 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:06:33,768 INFO L208 MainTranslator]: Completed translation [2021-10-28 23:06:33,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:06:33 WrapperNode [2021-10-28 23:06:33,770 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 23:06:33,772 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 23:06:33,773 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 23:06:33,773 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 23:06:33,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:06:33" (1/1) ... [2021-10-28 23:06:33,794 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:06:33" (1/1) ... [2021-10-28 23:06:33,827 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 23:06:33,829 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 23:06:33,829 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 23:06:33,829 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 23:06:33,839 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:06:33" (1/1) ... [2021-10-28 23:06:33,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:06:33" (1/1) ... [2021-10-28 23:06:33,852 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:06:33" (1/1) ... [2021-10-28 23:06:33,853 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:06:33" (1/1) ... [2021-10-28 23:06:33,863 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:06:33" (1/1) ... [2021-10-28 23:06:33,868 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:06:33" (1/1) ... [2021-10-28 23:06:33,870 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:06:33" (1/1) ... [2021-10-28 23:06:33,872 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 23:06:33,873 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 23:06:33,874 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 23:06:33,874 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 23:06:33,883 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:06:33" (1/1) ... [2021-10-28 23:06:33,893 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:06:33,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:06:33,926 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 23:06:33,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 23:06:33,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 23:06:33,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 23:06:33,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 23:06:33,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 23:06:34,284 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 23:06:34,284 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-28 23:06:34,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:06:34 BoogieIcfgContainer [2021-10-28 23:06:34,287 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 23:06:34,289 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 23:06:34,289 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 23:06:34,293 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 23:06:34,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 11:06:33" (1/3) ... [2021-10-28 23:06:34,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c1817d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:06:34, skipping insertion in model container [2021-10-28 23:06:34,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:06:33" (2/3) ... [2021-10-28 23:06:34,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c1817d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:06:34, skipping insertion in model container [2021-10-28 23:06:34,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:06:34" (3/3) ... [2021-10-28 23:06:34,298 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_delay_notd2.c [2021-10-28 23:06:34,304 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 23:06:34,305 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-28 23:06:34,361 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 23:06:34,369 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 [2021-10-28 23:06:34,370 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-28 23:06:34,389 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:34,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-28 23:06:34,396 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:06:34,397 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:06:34,398 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:06:34,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:06:34,406 INFO L85 PathProgramCache]: Analyzing trace with hash -493598204, now seen corresponding path program 1 times [2021-10-28 23:06:34,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:06:34,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581626442] [2021-10-28 23:06:34,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:06:34,420 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:06:34,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:06:34,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:06:34,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:06:34,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581626442] [2021-10-28 23:06:34,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581626442] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:06:34,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:06:34,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-28 23:06:34,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398487476] [2021-10-28 23:06:34,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-28 23:06:34,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:06:34,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-28 23:06:34,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 23:06:34,643 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 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 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:34,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:06:34,662 INFO L93 Difference]: Finished difference Result 33 states and 53 transitions. [2021-10-28 23:06:34,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-28 23:06:34,664 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-10-28 23:06:34,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:06:34,674 INFO L225 Difference]: With dead ends: 33 [2021-10-28 23:06:34,674 INFO L226 Difference]: Without dead ends: 16 [2021-10-28 23:06:34,678 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 23:06:34,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-28 23:06:34,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-28 23:06:34,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:34,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2021-10-28 23:06:34,717 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 12 [2021-10-28 23:06:34,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:06:34,718 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2021-10-28 23:06:34,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:34,719 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2021-10-28 23:06:34,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-28 23:06:34,720 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:06:34,720 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:06:34,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 23:06:34,721 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:06:34,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:06:34,722 INFO L85 PathProgramCache]: Analyzing trace with hash -2059231113, now seen corresponding path program 1 times [2021-10-28 23:06:34,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:06:34,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116564441] [2021-10-28 23:06:34,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:06:34,724 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:06:34,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:06:34,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:06:34,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:06:34,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116564441] [2021-10-28 23:06:34,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116564441] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:06:34,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:06:34,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:06:34,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503176852] [2021-10-28 23:06:34,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:06:34,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:06:34,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:06:34,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:06:34,831 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:34,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:06:34,891 INFO L93 Difference]: Finished difference Result 32 states and 46 transitions. [2021-10-28 23:06:34,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:06:34,892 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-10-28 23:06:34,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:06:34,893 INFO L225 Difference]: With dead ends: 32 [2021-10-28 23:06:34,893 INFO L226 Difference]: Without dead ends: 20 [2021-10-28 23:06:34,894 INFO L786 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 [2021-10-28 23:06:34,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-28 23:06:34,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2021-10-28 23:06:34,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:34,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2021-10-28 23:06:34,914 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 12 [2021-10-28 23:06:34,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:06:34,914 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2021-10-28 23:06:34,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:34,915 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2021-10-28 23:06:34,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 23:06:34,916 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:06:34,916 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:06:34,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 23:06:34,917 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:06:34,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:06:34,918 INFO L85 PathProgramCache]: Analyzing trace with hash 573171571, now seen corresponding path program 1 times [2021-10-28 23:06:34,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:06:34,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752799167] [2021-10-28 23:06:34,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:06:34,920 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:06:34,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:06:34,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:06:34,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:06:34,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752799167] [2021-10-28 23:06:34,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752799167] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:06:34,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:06:34,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:06:34,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266797347] [2021-10-28 23:06:34,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 23:06:34,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:06:34,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 23:06:34,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 23:06:34,984 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:35,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:06:35,068 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2021-10-28 23:06:35,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 23:06:35,069 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-10-28 23:06:35,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:06:35,070 INFO L225 Difference]: With dead ends: 38 [2021-10-28 23:06:35,071 INFO L226 Difference]: Without dead ends: 25 [2021-10-28 23:06:35,072 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 23:06:35,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-28 23:06:35,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 18. [2021-10-28 23:06:35,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:35,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2021-10-28 23:06:35,078 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 15 [2021-10-28 23:06:35,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:06:35,079 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2021-10-28 23:06:35,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:35,079 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2021-10-28 23:06:35,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 23:06:35,080 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:06:35,081 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:06:35,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 23:06:35,081 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:06:35,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:06:35,082 INFO L85 PathProgramCache]: Analyzing trace with hash 630429873, now seen corresponding path program 1 times [2021-10-28 23:06:35,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:06:35,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461306518] [2021-10-28 23:06:35,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:06:35,087 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:06:35,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:06:35,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:06:35,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:06:35,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461306518] [2021-10-28 23:06:35,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461306518] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:06:35,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:06:35,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:06:35,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794944775] [2021-10-28 23:06:35,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:06:35,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:06:35,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:06:35,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:06:35,298 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:35,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:06:35,363 INFO L93 Difference]: Finished difference Result 46 states and 64 transitions. [2021-10-28 23:06:35,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:06:35,364 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-10-28 23:06:35,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:06:35,367 INFO L225 Difference]: With dead ends: 46 [2021-10-28 23:06:35,367 INFO L226 Difference]: Without dead ends: 32 [2021-10-28 23:06:35,372 INFO L786 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 [2021-10-28 23:06:35,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-28 23:06:35,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2021-10-28 23:06:35,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:35,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 42 transitions. [2021-10-28 23:06:35,391 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 42 transitions. Word has length 15 [2021-10-28 23:06:35,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:06:35,392 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 42 transitions. [2021-10-28 23:06:35,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:35,393 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 42 transitions. [2021-10-28 23:06:35,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 23:06:35,395 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:06:35,396 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:06:35,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 23:06:35,397 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:06:35,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:06:35,401 INFO L85 PathProgramCache]: Analyzing trace with hash 630489455, now seen corresponding path program 1 times [2021-10-28 23:06:35,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:06:35,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353827718] [2021-10-28 23:06:35,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:06:35,403 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:06:35,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:06:35,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:06:35,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:06:35,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353827718] [2021-10-28 23:06:35,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353827718] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:06:35,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443257180] [2021-10-28 23:06:35,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:06:35,523 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:06:35,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:06:35,526 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:06:35,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 23:06:35,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:06:35,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 23:06:35,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:06:35,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:06:35,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443257180] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:06:35,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:06:35,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-10-28 23:06:35,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219136092] [2021-10-28 23:06:35,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:06:35,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:06:35,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:06:35,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:06:35,812 INFO L87 Difference]: Start difference. First operand 30 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:35,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:06:35,900 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2021-10-28 23:06:35,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:06:35,901 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-28 23:06:35,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:06:35,902 INFO L225 Difference]: With dead ends: 67 [2021-10-28 23:06:35,903 INFO L226 Difference]: Without dead ends: 41 [2021-10-28 23:06:35,904 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:06:35,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-28 23:06:35,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2021-10-28 23:06:35,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 35 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:35,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 50 transitions. [2021-10-28 23:06:35,912 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 50 transitions. Word has length 15 [2021-10-28 23:06:35,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:06:35,913 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 50 transitions. [2021-10-28 23:06:35,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:35,914 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 50 transitions. [2021-10-28 23:06:35,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 23:06:35,915 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:06:35,915 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:06:35,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 23:06:36,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:06:36,140 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:06:36,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:06:36,141 INFO L85 PathProgramCache]: Analyzing trace with hash 730990835, now seen corresponding path program 2 times [2021-10-28 23:06:36,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:06:36,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734142194] [2021-10-28 23:06:36,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:06:36,143 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:06:36,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:06:36,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:06:36,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:06:36,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734142194] [2021-10-28 23:06:36,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734142194] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:06:36,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204244802] [2021-10-28 23:06:36,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:06:36,225 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:06:36,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:06:36,227 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:06:36,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 23:06:36,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:06:36,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:06:36,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 23:06:36,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:06:36,448 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 23:06:36,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204244802] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:06:36,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:06:36,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-10-28 23:06:36,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289913562] [2021-10-28 23:06:36,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:06:36,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:06:36,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:06:36,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:06:36,453 INFO L87 Difference]: Start difference. First operand 36 states and 50 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:36,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:06:36,674 INFO L93 Difference]: Finished difference Result 123 states and 179 transitions. [2021-10-28 23:06:36,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 23:06:36,675 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 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 18 [2021-10-28 23:06:36,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:06:36,677 INFO L225 Difference]: With dead ends: 123 [2021-10-28 23:06:36,677 INFO L226 Difference]: Without dead ends: 91 [2021-10-28 23:06:36,679 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-10-28 23:06:36,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-10-28 23:06:36,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 76. [2021-10-28 23:06:36,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.3466666666666667) internal successors, (101), 75 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:36,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 101 transitions. [2021-10-28 23:06:36,713 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 101 transitions. Word has length 18 [2021-10-28 23:06:36,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:06:36,714 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 101 transitions. [2021-10-28 23:06:36,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:36,715 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 101 transitions. [2021-10-28 23:06:36,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 23:06:36,717 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:06:36,717 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:06:36,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 23:06:36,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:06:36,932 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:06:36,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:06:36,933 INFO L85 PathProgramCache]: Analyzing trace with hash -104466575, now seen corresponding path program 1 times [2021-10-28 23:06:36,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:06:36,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332111562] [2021-10-28 23:06:36,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:06:36,934 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:06:36,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:06:37,051 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:06:37,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:06:37,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332111562] [2021-10-28 23:06:37,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332111562] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:06:37,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335276821] [2021-10-28 23:06:37,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:06:37,053 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:06:37,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:06:37,055 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:06:37,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 23:06:37,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:06:37,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 23:06:37,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:06:37,307 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:06:37,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335276821] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:06:37,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:06:37,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-28 23:06:37,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351771782] [2021-10-28 23:06:37,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 23:06:37,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:06:37,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 23:06:37,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:06:37,311 INFO L87 Difference]: Start difference. First operand 76 states and 101 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:37,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:06:37,401 INFO L93 Difference]: Finished difference Result 199 states and 267 transitions. [2021-10-28 23:06:37,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:06:37,402 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 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 21 [2021-10-28 23:06:37,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:06:37,404 INFO L225 Difference]: With dead ends: 199 [2021-10-28 23:06:37,404 INFO L226 Difference]: Without dead ends: 127 [2021-10-28 23:06:37,405 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:06:37,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-10-28 23:06:37,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 88. [2021-10-28 23:06:37,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.3448275862068966) internal successors, (117), 87 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:37,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 117 transitions. [2021-10-28 23:06:37,421 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 117 transitions. Word has length 21 [2021-10-28 23:06:37,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:06:37,422 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 117 transitions. [2021-10-28 23:06:37,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:37,422 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 117 transitions. [2021-10-28 23:06:37,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-28 23:06:37,424 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:06:37,424 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:06:37,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 23:06:37,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-28 23:06:37,648 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:06:37,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:06:37,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1399176113, now seen corresponding path program 2 times [2021-10-28 23:06:37,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:06:37,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449695833] [2021-10-28 23:06:37,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:06:37,650 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:06:37,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:06:37,774 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:06:37,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:06:37,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449695833] [2021-10-28 23:06:37,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449695833] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:06:37,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330613996] [2021-10-28 23:06:37,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:06:37,776 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:06:37,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:06:37,788 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:06:37,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 23:06:37,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:06:37,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:06:37,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 23:06:37,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:06:38,207 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 23:06:38,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330613996] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:06:38,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:06:38,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-10-28 23:06:38,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038697281] [2021-10-28 23:06:38,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 23:06:38,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:06:38,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 23:06:38,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:06:38,211 INFO L87 Difference]: Start difference. First operand 88 states and 117 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:38,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:06:38,517 INFO L93 Difference]: Finished difference Result 291 states and 403 transitions. [2021-10-28 23:06:38,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 23:06:38,531 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 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 24 [2021-10-28 23:06:38,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:06:38,533 INFO L225 Difference]: With dead ends: 291 [2021-10-28 23:06:38,533 INFO L226 Difference]: Without dead ends: 207 [2021-10-28 23:06:38,535 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-10-28 23:06:38,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-10-28 23:06:38,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 146. [2021-10-28 23:06:38,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.3379310344827586) internal successors, (194), 145 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:38,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 194 transitions. [2021-10-28 23:06:38,564 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 194 transitions. Word has length 24 [2021-10-28 23:06:38,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:06:38,565 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 194 transitions. [2021-10-28 23:06:38,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:38,565 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 194 transitions. [2021-10-28 23:06:38,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-28 23:06:38,568 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:06:38,568 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:06:38,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 23:06:38,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:06:38,784 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:06:38,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:06:38,785 INFO L85 PathProgramCache]: Analyzing trace with hash -2084547665, now seen corresponding path program 3 times [2021-10-28 23:06:38,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:06:38,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134088292] [2021-10-28 23:06:38,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:06:38,785 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:06:38,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:06:38,910 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:06:38,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:06:38,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134088292] [2021-10-28 23:06:38,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134088292] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:06:38,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261487042] [2021-10-28 23:06:38,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:06:38,915 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:06:38,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:06:38,928 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:06:38,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 23:06:39,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-28 23:06:39,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:06:39,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 23:06:39,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:06:39,148 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-10-28 23:06:39,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261487042] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:06:39,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:06:39,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 11 [2021-10-28 23:06:39,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115592742] [2021-10-28 23:06:39,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:06:39,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:06:39,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:06:39,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:06:39,151 INFO L87 Difference]: Start difference. First operand 146 states and 194 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:39,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:06:39,222 INFO L93 Difference]: Finished difference Result 334 states and 446 transitions. [2021-10-28 23:06:39,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:06:39,236 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 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 27 [2021-10-28 23:06:39,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:06:39,238 INFO L225 Difference]: With dead ends: 334 [2021-10-28 23:06:39,238 INFO L226 Difference]: Without dead ends: 192 [2021-10-28 23:06:39,240 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:06:39,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-10-28 23:06:39,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 164. [2021-10-28 23:06:39,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.2392638036809815) internal successors, (202), 163 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:39,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 202 transitions. [2021-10-28 23:06:39,259 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 202 transitions. Word has length 27 [2021-10-28 23:06:39,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:06:39,259 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 202 transitions. [2021-10-28 23:06:39,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:39,276 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 202 transitions. [2021-10-28 23:06:39,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-28 23:06:39,278 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:06:39,278 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:06:39,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 23:06:39,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:06:39,492 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:06:39,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:06:39,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1868779761, now seen corresponding path program 1 times [2021-10-28 23:06:39,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:06:39,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640454773] [2021-10-28 23:06:39,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:06:39,493 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:06:39,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:06:39,540 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-10-28 23:06:39,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:06:39,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640454773] [2021-10-28 23:06:39,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640454773] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:06:39,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:06:39,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:06:39,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323328775] [2021-10-28 23:06:39,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 23:06:39,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:06:39,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 23:06:39,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 23:06:39,543 INFO L87 Difference]: Start difference. First operand 164 states and 202 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:39,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:06:39,586 INFO L93 Difference]: Finished difference Result 336 states and 416 transitions. [2021-10-28 23:06:39,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 23:06:39,587 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 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 27 [2021-10-28 23:06:39,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:06:39,589 INFO L225 Difference]: With dead ends: 336 [2021-10-28 23:06:39,604 INFO L226 Difference]: Without dead ends: 176 [2021-10-28 23:06:39,605 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 23:06:39,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-10-28 23:06:39,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 162. [2021-10-28 23:06:39,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.2173913043478262) internal successors, (196), 161 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:39,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 196 transitions. [2021-10-28 23:06:39,648 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 196 transitions. Word has length 27 [2021-10-28 23:06:39,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:06:39,649 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 196 transitions. [2021-10-28 23:06:39,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:39,649 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 196 transitions. [2021-10-28 23:06:39,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-28 23:06:39,650 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:06:39,650 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:06:39,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-28 23:06:39,651 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:06:39,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:06:39,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1325275563, now seen corresponding path program 1 times [2021-10-28 23:06:39,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:06:39,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766627696] [2021-10-28 23:06:39,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:06:39,652 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:06:39,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:06:39,778 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:06:39,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:06:39,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766627696] [2021-10-28 23:06:39,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766627696] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:06:39,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129111497] [2021-10-28 23:06:39,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:06:39,782 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:06:39,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:06:39,788 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:06:39,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 23:06:39,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:06:39,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 23:06:39,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:06:40,202 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:06:40,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129111497] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:06:40,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:06:40,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-28 23:06:40,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842283927] [2021-10-28 23:06:40,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 23:06:40,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:06:40,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 23:06:40,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-10-28 23:06:40,205 INFO L87 Difference]: Start difference. First operand 162 states and 196 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:40,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:06:40,313 INFO L93 Difference]: Finished difference Result 449 states and 539 transitions. [2021-10-28 23:06:40,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 23:06:40,314 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 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 28 [2021-10-28 23:06:40,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:06:40,317 INFO L225 Difference]: With dead ends: 449 [2021-10-28 23:06:40,317 INFO L226 Difference]: Without dead ends: 291 [2021-10-28 23:06:40,318 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-10-28 23:06:40,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-10-28 23:06:40,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 192. [2021-10-28 23:06:40,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.2041884816753927) internal successors, (230), 191 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:40,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 230 transitions. [2021-10-28 23:06:40,344 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 230 transitions. Word has length 28 [2021-10-28 23:06:40,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:06:40,345 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 230 transitions. [2021-10-28 23:06:40,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:40,345 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 230 transitions. [2021-10-28 23:06:40,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-28 23:06:40,347 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:06:40,347 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:06:40,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 23:06:40,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:06:40,572 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:06:40,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:06:40,573 INFO L85 PathProgramCache]: Analyzing trace with hash 399501479, now seen corresponding path program 2 times [2021-10-28 23:06:40,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:06:40,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760034648] [2021-10-28 23:06:40,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:06:40,573 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:06:40,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:06:40,709 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:06:40,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:06:40,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760034648] [2021-10-28 23:06:40,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760034648] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:06:40,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096987217] [2021-10-28 23:06:40,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:06:40,718 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:06:40,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:06:40,719 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:06:40,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 23:06:40,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:06:40,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:06:40,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 23:06:40,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:06:41,139 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:06:41,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096987217] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:06:41,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:06:41,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-28 23:06:41,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859621862] [2021-10-28 23:06:41,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-28 23:06:41,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:06:41,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-28 23:06:41,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-10-28 23:06:41,142 INFO L87 Difference]: Start difference. First operand 192 states and 230 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:41,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:06:41,295 INFO L93 Difference]: Finished difference Result 509 states and 607 transitions. [2021-10-28 23:06:41,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:06:41,296 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-10-28 23:06:41,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:06:41,299 INFO L225 Difference]: With dead ends: 509 [2021-10-28 23:06:41,299 INFO L226 Difference]: Without dead ends: 321 [2021-10-28 23:06:41,300 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-10-28 23:06:41,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-10-28 23:06:41,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 222. [2021-10-28 23:06:41,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 1.1945701357466063) internal successors, (264), 221 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:41,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 264 transitions. [2021-10-28 23:06:41,322 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 264 transitions. Word has length 31 [2021-10-28 23:06:41,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:06:41,323 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 264 transitions. [2021-10-28 23:06:41,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:41,323 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 264 transitions. [2021-10-28 23:06:41,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-28 23:06:41,325 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:06:41,326 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:06:41,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 23:06:41,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:06:41,550 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:06:41,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:06:41,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1351227349, now seen corresponding path program 3 times [2021-10-28 23:06:41,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:06:41,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312013190] [2021-10-28 23:06:41,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:06:41,551 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:06:41,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:06:41,725 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:06:41,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:06:41,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312013190] [2021-10-28 23:06:41,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312013190] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:06:41,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29368497] [2021-10-28 23:06:41,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:06:41,729 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:06:41,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:06:41,730 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:06:41,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 23:06:41,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-28 23:06:41,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:06:41,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 23:06:41,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:06:42,053 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-10-28 23:06:42,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29368497] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:06:42,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:06:42,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2021-10-28 23:06:42,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81345059] [2021-10-28 23:06:42,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:06:42,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:06:42,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:06:42,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-10-28 23:06:42,057 INFO L87 Difference]: Start difference. First operand 222 states and 264 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:42,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:06:42,147 INFO L93 Difference]: Finished difference Result 225 states and 266 transitions. [2021-10-28 23:06:42,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:06:42,148 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 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 34 [2021-10-28 23:06:42,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:06:42,150 INFO L225 Difference]: With dead ends: 225 [2021-10-28 23:06:42,150 INFO L226 Difference]: Without dead ends: 165 [2021-10-28 23:06:42,151 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-10-28 23:06:42,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-10-28 23:06:42,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2021-10-28 23:06:42,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.2085889570552146) internal successors, (197), 163 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:42,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 197 transitions. [2021-10-28 23:06:42,168 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 197 transitions. Word has length 34 [2021-10-28 23:06:42,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:06:42,168 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 197 transitions. [2021-10-28 23:06:42,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:42,169 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 197 transitions. [2021-10-28 23:06:42,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-28 23:06:42,170 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:06:42,170 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:06:42,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 23:06:42,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-28 23:06:42,396 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:06:42,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:06:42,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1860700439, now seen corresponding path program 1 times [2021-10-28 23:06:42,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:06:42,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534965576] [2021-10-28 23:06:42,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:06:42,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:06:42,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:06:42,528 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:06:42,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:06:42,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534965576] [2021-10-28 23:06:42,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534965576] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:06:42,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453595193] [2021-10-28 23:06:42,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:06:42,530 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:06:42,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:06:42,531 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:06:42,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 23:06:42,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:06:42,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 23:06:42,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:06:43,025 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:06:43,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453595193] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:06:43,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:06:43,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-10-28 23:06:43,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415911002] [2021-10-28 23:06:43,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 23:06:43,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:06:43,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 23:06:43,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-10-28 23:06:43,030 INFO L87 Difference]: Start difference. First operand 164 states and 197 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:43,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:06:43,164 INFO L93 Difference]: Finished difference Result 443 states and 529 transitions. [2021-10-28 23:06:43,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 23:06:43,165 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 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 34 [2021-10-28 23:06:43,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:06:43,168 INFO L225 Difference]: With dead ends: 443 [2021-10-28 23:06:43,168 INFO L226 Difference]: Without dead ends: 283 [2021-10-28 23:06:43,169 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-10-28 23:06:43,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-10-28 23:06:43,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 188. [2021-10-28 23:06:43,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.2032085561497325) internal successors, (225), 187 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:43,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 225 transitions. [2021-10-28 23:06:43,188 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 225 transitions. Word has length 34 [2021-10-28 23:06:43,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:06:43,189 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 225 transitions. [2021-10-28 23:06:43,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:43,189 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 225 transitions. [2021-10-28 23:06:43,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-28 23:06:43,191 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:06:43,191 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:06:43,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 23:06:43,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:06:43,412 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:06:43,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:06:43,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1470700201, now seen corresponding path program 2 times [2021-10-28 23:06:43,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:06:43,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840262976] [2021-10-28 23:06:43,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:06:43,414 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:06:43,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:06:43,535 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:06:43,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:06:43,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840262976] [2021-10-28 23:06:43,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840262976] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:06:43,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584227811] [2021-10-28 23:06:43,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:06:43,537 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:06:43,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:06:43,540 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:06:43,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 23:06:43,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:06:43,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:06:43,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 23:06:43,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:06:44,107 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:06:44,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584227811] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:06:44,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:06:44,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-10-28 23:06:44,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253227903] [2021-10-28 23:06:44,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-28 23:06:44,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:06:44,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-28 23:06:44,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-10-28 23:06:44,111 INFO L87 Difference]: Start difference. First operand 188 states and 225 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:44,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:06:44,287 INFO L93 Difference]: Finished difference Result 491 states and 585 transitions. [2021-10-28 23:06:44,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 23:06:44,288 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 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 37 [2021-10-28 23:06:44,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:06:44,292 INFO L225 Difference]: With dead ends: 491 [2021-10-28 23:06:44,292 INFO L226 Difference]: Without dead ends: 307 [2021-10-28 23:06:44,295 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-10-28 23:06:44,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-10-28 23:06:44,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 212. [2021-10-28 23:06:44,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.1990521327014219) internal successors, (253), 211 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:44,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 253 transitions. [2021-10-28 23:06:44,326 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 253 transitions. Word has length 37 [2021-10-28 23:06:44,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:06:44,329 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 253 transitions. [2021-10-28 23:06:44,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:44,330 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 253 transitions. [2021-10-28 23:06:44,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 23:06:44,332 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:06:44,333 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:06:44,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 23:06:44,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-28 23:06:44,548 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:06:44,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:06:44,549 INFO L85 PathProgramCache]: Analyzing trace with hash -877109527, now seen corresponding path program 3 times [2021-10-28 23:06:44,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:06:44,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731092510] [2021-10-28 23:06:44,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:06:44,549 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:06:44,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:06:44,723 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:06:44,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:06:44,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731092510] [2021-10-28 23:06:44,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731092510] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:06:44,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112223588] [2021-10-28 23:06:44,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:06:44,724 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:06:44,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:06:44,725 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:06:44,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 23:06:44,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-28 23:06:44,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:06:44,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-28 23:06:44,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:06:45,463 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-10-28 23:06:45,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112223588] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:06:45,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:06:45,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 19 [2021-10-28 23:06:45,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500002260] [2021-10-28 23:06:45,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:06:45,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:06:45,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:06:45,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-10-28 23:06:45,468 INFO L87 Difference]: Start difference. First operand 212 states and 253 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:45,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:06:45,620 INFO L93 Difference]: Finished difference Result 486 states and 576 transitions. [2021-10-28 23:06:45,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 23:06:45,620 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-10-28 23:06:45,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:06:45,624 INFO L225 Difference]: With dead ends: 486 [2021-10-28 23:06:45,625 INFO L226 Difference]: Without dead ends: 484 [2021-10-28 23:06:45,626 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-10-28 23:06:45,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-10-28 23:06:45,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 300. [2021-10-28 23:06:45,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 1.1872909698996656) internal successors, (355), 299 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:45,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 355 transitions. [2021-10-28 23:06:45,669 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 355 transitions. Word has length 40 [2021-10-28 23:06:45,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:06:45,670 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 355 transitions. [2021-10-28 23:06:45,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:45,670 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 355 transitions. [2021-10-28 23:06:45,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 23:06:45,671 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:06:45,671 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:06:45,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 23:06:45,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-28 23:06:45,892 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:06:45,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:06:45,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1952423639, now seen corresponding path program 1 times [2021-10-28 23:06:45,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:06:45,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365121217] [2021-10-28 23:06:45,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:06:45,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:06:45,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:06:45,925 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-28 23:06:45,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:06:45,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365121217] [2021-10-28 23:06:45,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365121217] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:06:45,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:06:45,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:06:45,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030509245] [2021-10-28 23:06:45,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 23:06:45,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:06:45,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 23:06:45,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 23:06:45,929 INFO L87 Difference]: Start difference. First operand 300 states and 355 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:45,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:06:45,968 INFO L93 Difference]: Finished difference Result 427 states and 509 transitions. [2021-10-28 23:06:45,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 23:06:45,969 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 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 40 [2021-10-28 23:06:45,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:06:45,972 INFO L225 Difference]: With dead ends: 427 [2021-10-28 23:06:45,972 INFO L226 Difference]: Without dead ends: 319 [2021-10-28 23:06:45,973 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 23:06:45,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-10-28 23:06:46,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 306. [2021-10-28 23:06:46,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 1.1836065573770491) internal successors, (361), 305 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:46,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 361 transitions. [2021-10-28 23:06:46,005 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 361 transitions. Word has length 40 [2021-10-28 23:06:46,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:06:46,006 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 361 transitions. [2021-10-28 23:06:46,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:46,006 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 361 transitions. [2021-10-28 23:06:46,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 23:06:46,007 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:06:46,007 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:06:46,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-28 23:06:46,008 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:06:46,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:06:46,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1950517015, now seen corresponding path program 1 times [2021-10-28 23:06:46,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:06:46,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946626151] [2021-10-28 23:06:46,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:06:46,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:06:46,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:06:46,153 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:06:46,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:06:46,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946626151] [2021-10-28 23:06:46,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946626151] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:06:46,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312878588] [2021-10-28 23:06:46,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:06:46,154 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:06:46,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:06:46,156 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:06:46,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 23:06:46,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:06:46,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 23:06:46,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:06:46,785 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:06:46,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312878588] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:06:46,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:06:46,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-10-28 23:06:46,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291652485] [2021-10-28 23:06:46,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-28 23:06:46,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:06:46,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-28 23:06:46,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=298, Unknown=0, NotChecked=0, Total=506 [2021-10-28 23:06:46,789 INFO L87 Difference]: Start difference. First operand 306 states and 361 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:46,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:06:46,969 INFO L93 Difference]: Finished difference Result 669 states and 793 transitions. [2021-10-28 23:06:46,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 23:06:46,970 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 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 40 [2021-10-28 23:06:46,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:06:46,974 INFO L225 Difference]: With dead ends: 669 [2021-10-28 23:06:46,974 INFO L226 Difference]: Without dead ends: 439 [2021-10-28 23:06:46,976 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=208, Invalid=298, Unknown=0, NotChecked=0, Total=506 [2021-10-28 23:06:46,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-10-28 23:06:47,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 339. [2021-10-28 23:06:47,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 1.180473372781065) internal successors, (399), 338 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:47,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 399 transitions. [2021-10-28 23:06:47,013 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 399 transitions. Word has length 40 [2021-10-28 23:06:47,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:06:47,014 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 399 transitions. [2021-10-28 23:06:47,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:47,014 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 399 transitions. [2021-10-28 23:06:47,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-28 23:06:47,016 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:06:47,016 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:06:47,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 23:06:47,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-28 23:06:47,236 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:06:47,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:06:47,236 INFO L85 PathProgramCache]: Analyzing trace with hash -658324379, now seen corresponding path program 2 times [2021-10-28 23:06:47,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:06:47,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003992563] [2021-10-28 23:06:47,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:06:47,237 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:06:47,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:06:47,431 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:06:47,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:06:47,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003992563] [2021-10-28 23:06:47,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003992563] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:06:47,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436543835] [2021-10-28 23:06:47,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:06:47,433 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:06:47,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:06:47,436 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:06:47,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 23:06:47,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:06:47,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:06:47,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 23:06:47,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:06:47,959 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-10-28 23:06:47,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436543835] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:06:47,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:06:47,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 18 [2021-10-28 23:06:47,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202419804] [2021-10-28 23:06:47,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 23:06:47,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:06:47,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 23:06:47,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=212, Unknown=0, NotChecked=0, Total=342 [2021-10-28 23:06:47,964 INFO L87 Difference]: Start difference. First operand 339 states and 399 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:48,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:06:48,584 INFO L93 Difference]: Finished difference Result 1075 states and 1251 transitions. [2021-10-28 23:06:48,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-28 23:06:48,584 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 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 43 [2021-10-28 23:06:48,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:06:48,590 INFO L225 Difference]: With dead ends: 1075 [2021-10-28 23:06:48,591 INFO L226 Difference]: Without dead ends: 821 [2021-10-28 23:06:48,592 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=486, Invalid=996, Unknown=0, NotChecked=0, Total=1482 [2021-10-28 23:06:48,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2021-10-28 23:06:48,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 333. [2021-10-28 23:06:48,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.1686746987951808) internal successors, (388), 332 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:48,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 388 transitions. [2021-10-28 23:06:48,636 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 388 transitions. Word has length 43 [2021-10-28 23:06:48,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:06:48,636 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 388 transitions. [2021-10-28 23:06:48,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:48,637 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 388 transitions. [2021-10-28 23:06:48,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-28 23:06:48,638 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:06:48,638 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:06:48,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 23:06:48,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:06:48,852 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:06:48,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:06:48,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1311604647, now seen corresponding path program 3 times [2021-10-28 23:06:48,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:06:48,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485224038] [2021-10-28 23:06:48,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:06:48,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:06:48,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:06:49,029 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:06:49,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:06:49,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485224038] [2021-10-28 23:06:49,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485224038] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:06:49,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017172214] [2021-10-28 23:06:49,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:06:49,030 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:06:49,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:06:49,032 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:06:49,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 23:06:49,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-28 23:06:49,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:06:49,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 23:06:49,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:06:49,992 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-28 23:06:49,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017172214] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:06:49,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:06:49,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [14] total 21 [2021-10-28 23:06:49,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068508565] [2021-10-28 23:06:49,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:06:49,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:06:49,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:06:49,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-10-28 23:06:49,998 INFO L87 Difference]: Start difference. First operand 333 states and 388 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:50,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:06:50,208 INFO L93 Difference]: Finished difference Result 442 states and 513 transitions. [2021-10-28 23:06:50,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:06:50,209 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-10-28 23:06:50,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:06:50,213 INFO L225 Difference]: With dead ends: 442 [2021-10-28 23:06:50,213 INFO L226 Difference]: Without dead ends: 440 [2021-10-28 23:06:50,214 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-10-28 23:06:50,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-10-28 23:06:50,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 333. [2021-10-28 23:06:50,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.1686746987951808) internal successors, (388), 332 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:50,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 388 transitions. [2021-10-28 23:06:50,253 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 388 transitions. Word has length 46 [2021-10-28 23:06:50,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:06:50,254 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 388 transitions. [2021-10-28 23:06:50,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:50,254 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 388 transitions. [2021-10-28 23:06:50,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-28 23:06:50,255 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:06:50,256 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:06:50,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 23:06:50,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:06:50,472 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:06:50,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:06:50,473 INFO L85 PathProgramCache]: Analyzing trace with hash -53609623, now seen corresponding path program 1 times [2021-10-28 23:06:50,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:06:50,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539576479] [2021-10-28 23:06:50,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:06:50,473 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:06:50,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:06:50,524 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-10-28 23:06:50,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:06:50,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539576479] [2021-10-28 23:06:50,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539576479] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:06:50,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:06:50,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:06:50,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751684459] [2021-10-28 23:06:50,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:06:50,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:06:50,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:06:50,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:06:50,528 INFO L87 Difference]: Start difference. First operand 333 states and 388 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:50,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:06:50,606 INFO L93 Difference]: Finished difference Result 561 states and 655 transitions. [2021-10-28 23:06:50,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:06:50,607 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 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 46 [2021-10-28 23:06:50,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:06:50,610 INFO L225 Difference]: With dead ends: 561 [2021-10-28 23:06:50,611 INFO L226 Difference]: Without dead ends: 448 [2021-10-28 23:06:50,612 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:06:50,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-10-28 23:06:50,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 400. [2021-10-28 23:06:50,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 1.1754385964912282) internal successors, (469), 399 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:50,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 469 transitions. [2021-10-28 23:06:50,658 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 469 transitions. Word has length 46 [2021-10-28 23:06:50,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:06:50,659 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 469 transitions. [2021-10-28 23:06:50,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:50,659 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 469 transitions. [2021-10-28 23:06:50,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-10-28 23:06:50,661 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:06:50,661 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 20, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:06:50,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-10-28 23:06:50,662 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:06:50,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:06:50,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1284068705, now seen corresponding path program 1 times [2021-10-28 23:06:50,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:06:50,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200919509] [2021-10-28 23:06:50,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:06:50,663 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:06:50,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:06:50,852 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 387 proven. 176 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-10-28 23:06:50,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:06:50,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200919509] [2021-10-28 23:06:50,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200919509] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:06:50,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760434821] [2021-10-28 23:06:50,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:06:50,853 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:06:50,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:06:50,860 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:06:50,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 23:06:51,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:06:51,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-28 23:06:51,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:06:51,776 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 387 proven. 176 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-10-28 23:06:51,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760434821] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:06:51,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:06:51,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-10-28 23:06:51,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178955012] [2021-10-28 23:06:51,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-28 23:06:51,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:06:51,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-28 23:06:51,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2021-10-28 23:06:51,780 INFO L87 Difference]: Start difference. First operand 400 states and 469 transitions. Second operand has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:52,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:06:52,110 INFO L93 Difference]: Finished difference Result 1102 states and 1266 transitions. [2021-10-28 23:06:52,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 23:06:52,111 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-10-28 23:06:52,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:06:52,117 INFO L225 Difference]: With dead ends: 1102 [2021-10-28 23:06:52,117 INFO L226 Difference]: Without dead ends: 793 [2021-10-28 23:06:52,119 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2021-10-28 23:06:52,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2021-10-28 23:06:52,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 439. [2021-10-28 23:06:52,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 1.17351598173516) internal successors, (514), 438 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:52,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 514 transitions. [2021-10-28 23:06:52,178 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 514 transitions. Word has length 87 [2021-10-28 23:06:52,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:06:52,178 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 514 transitions. [2021-10-28 23:06:52,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:52,179 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 514 transitions. [2021-10-28 23:06:52,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-10-28 23:06:52,187 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:06:52,188 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 22, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:06:52,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-28 23:06:52,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:06:52,404 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:06:52,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:06:52,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1856213775, now seen corresponding path program 2 times [2021-10-28 23:06:52,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:06:52,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624313179] [2021-10-28 23:06:52,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:06:52,405 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:06:52,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:06:52,607 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 458 proven. 210 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-10-28 23:06:52,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:06:52,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624313179] [2021-10-28 23:06:52,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624313179] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:06:52,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055592708] [2021-10-28 23:06:52,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:06:52,608 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:06:52,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:06:52,609 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:06:52,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 23:06:53,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:06:53,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:06:53,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 23:06:53,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:06:53,666 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 458 proven. 210 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-10-28 23:06:53,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055592708] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:06:53,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:06:53,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-10-28 23:06:53,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102126582] [2021-10-28 23:06:53,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-28 23:06:53,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:06:53,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-28 23:06:53,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=484, Unknown=0, NotChecked=0, Total=812 [2021-10-28 23:06:53,669 INFO L87 Difference]: Start difference. First operand 439 states and 514 transitions. Second operand has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:54,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:06:54,020 INFO L93 Difference]: Finished difference Result 1171 states and 1346 transitions. [2021-10-28 23:06:54,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 23:06:54,021 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-10-28 23:06:54,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:06:54,027 INFO L225 Difference]: With dead ends: 1171 [2021-10-28 23:06:54,027 INFO L226 Difference]: Without dead ends: 832 [2021-10-28 23:06:54,029 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=328, Invalid=484, Unknown=0, NotChecked=0, Total=812 [2021-10-28 23:06:54,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2021-10-28 23:06:54,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 478. [2021-10-28 23:06:54,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 1.1719077568134173) internal successors, (559), 477 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:54,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 559 transitions. [2021-10-28 23:06:54,104 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 559 transitions. Word has length 93 [2021-10-28 23:06:54,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:06:54,104 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 559 transitions. [2021-10-28 23:06:54,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:54,105 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 559 transitions. [2021-10-28 23:06:54,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-10-28 23:06:54,108 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:06:54,108 INFO L513 BasicCegarLoop]: trace histogram [26, 26, 24, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:06:54,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-28 23:06:54,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-28 23:06:54,312 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:06:54,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:06:54,313 INFO L85 PathProgramCache]: Analyzing trace with hash -267019423, now seen corresponding path program 3 times [2021-10-28 23:06:54,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:06:54,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680782245] [2021-10-28 23:06:54,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:06:54,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:06:54,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:06:54,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 535 proven. 247 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-10-28 23:06:54,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:06:54,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680782245] [2021-10-28 23:06:54,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680782245] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:06:54,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878450411] [2021-10-28 23:06:54,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:06:54,523 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:06:54,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:06:54,525 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:06:54,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-28 23:06:54,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-28 23:06:54,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:06:54,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-28 23:06:54,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:06:55,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 37 proven. 541 refuted. 0 times theorem prover too weak. 457 trivial. 0 not checked. [2021-10-28 23:06:55,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878450411] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:06:55,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:06:55,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 24 [2021-10-28 23:06:55,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579629563] [2021-10-28 23:06:55,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-28 23:06:55,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:06:55,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-28 23:06:55,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-10-28 23:06:55,832 INFO L87 Difference]: Start difference. First operand 478 states and 559 transitions. Second operand has 24 states, 24 states have (on average 3.75) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:58,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:06:58,210 INFO L93 Difference]: Finished difference Result 2208 states and 2540 transitions. [2021-10-28 23:06:58,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-10-28 23:06:58,210 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 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 99 [2021-10-28 23:06:58,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:06:58,222 INFO L225 Difference]: With dead ends: 2208 [2021-10-28 23:06:58,222 INFO L226 Difference]: Without dead ends: 1839 [2021-10-28 23:06:58,227 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2190 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1574, Invalid=5908, Unknown=0, NotChecked=0, Total=7482 [2021-10-28 23:06:58,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2021-10-28 23:06:58,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 770. [2021-10-28 23:06:58,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 769 states have (on average 1.1716514954486346) internal successors, (901), 769 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:58,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 901 transitions. [2021-10-28 23:06:58,359 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 901 transitions. Word has length 99 [2021-10-28 23:06:58,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:06:58,360 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 901 transitions. [2021-10-28 23:06:58,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:58,360 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 901 transitions. [2021-10-28 23:06:58,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-10-28 23:06:58,363 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:06:58,363 INFO L513 BasicCegarLoop]: trace histogram [28, 28, 24, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:06:58,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-28 23:06:58,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-28 23:06:58,576 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:06:58,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:06:58,577 INFO L85 PathProgramCache]: Analyzing trace with hash -111346257, now seen corresponding path program 1 times [2021-10-28 23:06:58,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:06:58,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191501087] [2021-10-28 23:06:58,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:06:58,577 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:06:58,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:06:58,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 49 proven. 861 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-10-28 23:06:58,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:06:58,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191501087] [2021-10-28 23:06:58,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191501087] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:06:58,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284235060] [2021-10-28 23:06:58,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:06:58,905 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:06:58,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:06:58,920 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:06:58,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 23:06:59,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:06:59,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 23:06:59,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:07:00,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 618 proven. 287 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2021-10-28 23:07:00,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284235060] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:07:00,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:07:00,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-10-28 23:07:00,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025884415] [2021-10-28 23:07:00,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-28 23:07:00,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:07:00,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-28 23:07:00,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=633, Unknown=0, NotChecked=0, Total=1056 [2021-10-28 23:07:00,235 INFO L87 Difference]: Start difference. First operand 770 states and 901 transitions. Second operand has 33 states, 33 states have (on average 3.606060606060606) internal successors, (119), 32 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:07:00,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:07:00,653 INFO L93 Difference]: Finished difference Result 1968 states and 2264 transitions. [2021-10-28 23:07:00,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 23:07:00,654 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.606060606060606) internal successors, (119), 32 states have internal predecessors, (119), 0 states have call successors, (0), 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 105 [2021-10-28 23:07:00,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:07:00,663 INFO L225 Difference]: With dead ends: 1968 [2021-10-28 23:07:00,663 INFO L226 Difference]: Without dead ends: 1316 [2021-10-28 23:07:00,665 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=423, Invalid=633, Unknown=0, NotChecked=0, Total=1056 [2021-10-28 23:07:00,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2021-10-28 23:07:00,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 809. [2021-10-28 23:07:00,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 1.1707920792079207) internal successors, (946), 808 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:07:00,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 946 transitions. [2021-10-28 23:07:00,818 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 946 transitions. Word has length 105 [2021-10-28 23:07:00,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:07:00,819 INFO L470 AbstractCegarLoop]: Abstraction has 809 states and 946 transitions. [2021-10-28 23:07:00,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.606060606060606) internal successors, (119), 32 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:07:00,820 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 946 transitions. [2021-10-28 23:07:00,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-10-28 23:07:00,823 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:07:00,823 INFO L513 BasicCegarLoop]: trace histogram [30, 30, 26, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:07:00,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:01,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-28 23:07:01,036 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:07:01,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:07:01,037 INFO L85 PathProgramCache]: Analyzing trace with hash 802849635, now seen corresponding path program 2 times [2021-10-28 23:07:01,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:07:01,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386182605] [2021-10-28 23:07:01,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:07:01,037 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:07:01,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:01,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 52 proven. 990 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2021-10-28 23:07:01,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:07:01,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386182605] [2021-10-28 23:07:01,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386182605] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:07:01,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999808905] [2021-10-28 23:07:01,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:07:01,314 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:07:01,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:01,316 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:07:01,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-28 23:07:01,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:07:01,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:07:01,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-28 23:07:01,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:07:02,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 707 proven. 330 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2021-10-28 23:07:02,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999808905] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:07:02,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:07:02,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-10-28 23:07:02,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728605334] [2021-10-28 23:07:02,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-28 23:07:02,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:07:02,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-28 23:07:02,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=475, Invalid=715, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 23:07:02,590 INFO L87 Difference]: Start difference. First operand 809 states and 946 transitions. Second operand has 35 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 34 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:07:03,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:07:03,048 INFO L93 Difference]: Finished difference Result 2078 states and 2393 transitions. [2021-10-28 23:07:03,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-28 23:07:03,048 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 34 states have internal predecessors, (125), 0 states have call successors, (0), 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 111 [2021-10-28 23:07:03,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:07:03,056 INFO L225 Difference]: With dead ends: 2078 [2021-10-28 23:07:03,056 INFO L226 Difference]: Without dead ends: 1396 [2021-10-28 23:07:03,058 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=475, Invalid=715, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 23:07:03,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2021-10-28 23:07:03,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 866. [2021-10-28 23:07:03,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 1.169942196531792) internal successors, (1012), 865 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:07:03,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1012 transitions. [2021-10-28 23:07:03,218 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1012 transitions. Word has length 111 [2021-10-28 23:07:03,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:07:03,219 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 1012 transitions. [2021-10-28 23:07:03,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 34 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:07:03,220 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1012 transitions. [2021-10-28 23:07:03,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-10-28 23:07:03,222 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:07:03,222 INFO L513 BasicCegarLoop]: trace histogram [32, 32, 28, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:07:03,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:03,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-28 23:07:03,423 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:07:03,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:07:03,424 INFO L85 PathProgramCache]: Analyzing trace with hash -780287697, now seen corresponding path program 3 times [2021-10-28 23:07:03,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:07:03,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653781412] [2021-10-28 23:07:03,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:07:03,424 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:07:03,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:03,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 55 proven. 1128 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-10-28 23:07:03,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:07:03,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653781412] [2021-10-28 23:07:03,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653781412] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:07:03,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964005925] [2021-10-28 23:07:03,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:07:03,743 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:07:03,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:03,745 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:07:03,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-28 23:07:04,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-28 23:07:04,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:07:04,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 23:07:04,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:07:04,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 807 proven. 47 refuted. 0 times theorem prover too weak. 706 trivial. 0 not checked. [2021-10-28 23:07:04,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964005925] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:07:04,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:07:04,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7] total 25 [2021-10-28 23:07:04,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737244267] [2021-10-28 23:07:04,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-28 23:07:04,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:07:04,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-28 23:07:04,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2021-10-28 23:07:04,988 INFO L87 Difference]: Start difference. First operand 866 states and 1012 transitions. Second operand has 25 states, 25 states have (on average 3.96) internal successors, (99), 25 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:07:06,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:07:06,886 INFO L93 Difference]: Finished difference Result 1933 states and 2278 transitions. [2021-10-28 23:07:06,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-10-28 23:07:06,887 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.96) internal successors, (99), 25 states have internal predecessors, (99), 0 states have call successors, (0), 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 117 [2021-10-28 23:07:06,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:07:06,894 INFO L225 Difference]: With dead ends: 1933 [2021-10-28 23:07:06,894 INFO L226 Difference]: Without dead ends: 1203 [2021-10-28 23:07:06,898 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1839 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1816, Invalid=4990, Unknown=0, NotChecked=0, Total=6806 [2021-10-28 23:07:06,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2021-10-28 23:07:07,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 794. [2021-10-28 23:07:07,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 793 states have (on average 1.1235813366960907) internal successors, (891), 793 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:07:07,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 891 transitions. [2021-10-28 23:07:07,042 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 891 transitions. Word has length 117 [2021-10-28 23:07:07,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:07:07,042 INFO L470 AbstractCegarLoop]: Abstraction has 794 states and 891 transitions. [2021-10-28 23:07:07,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.96) internal successors, (99), 25 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:07:07,043 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 891 transitions. [2021-10-28 23:07:07,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-10-28 23:07:07,046 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:07:07,046 INFO L513 BasicCegarLoop]: trace histogram [34, 34, 20, 14, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:07:07,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:07,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-28 23:07:07,272 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:07:07,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:07:07,272 INFO L85 PathProgramCache]: Analyzing trace with hash 838744801, now seen corresponding path program 1 times [2021-10-28 23:07:07,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:07:07,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701878411] [2021-10-28 23:07:07,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:07:07,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:07:07,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:07,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1759 backedges. 984 proven. 0 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2021-10-28 23:07:07,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:07:07,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701878411] [2021-10-28 23:07:07,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701878411] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:07:07,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:07:07,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 23:07:07,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135135747] [2021-10-28 23:07:07,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:07:07,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:07:07,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:07:07,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:07:07,341 INFO L87 Difference]: Start difference. First operand 794 states and 891 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:07:07,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:07:07,548 INFO L93 Difference]: Finished difference Result 1253 states and 1372 transitions. [2021-10-28 23:07:07,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:07:07,548 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 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 [2021-10-28 23:07:07,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:07:07,553 INFO L225 Difference]: With dead ends: 1253 [2021-10-28 23:07:07,553 INFO L226 Difference]: Without dead ends: 1051 [2021-10-28 23:07:07,554 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:07:07,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2021-10-28 23:07:07,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 803. [2021-10-28 23:07:07,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 1.125935162094763) internal successors, (903), 802 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:07:07,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 903 transitions. [2021-10-28 23:07:07,678 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 903 transitions. Word has length 123 [2021-10-28 23:07:07,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:07:07,678 INFO L470 AbstractCegarLoop]: Abstraction has 803 states and 903 transitions. [2021-10-28 23:07:07,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:07:07,679 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 903 transitions. [2021-10-28 23:07:07,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-10-28 23:07:07,682 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:07:07,682 INFO L513 BasicCegarLoop]: trace histogram [34, 34, 19, 15, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:07:07,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-10-28 23:07:07,682 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:07:07,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:07:07,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1273355935, now seen corresponding path program 4 times [2021-10-28 23:07:07,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:07:07,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705114862] [2021-10-28 23:07:07,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:07:07,684 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:07:07,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:07,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1759 backedges. 903 proven. 425 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2021-10-28 23:07:07,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:07:07,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705114862] [2021-10-28 23:07:07,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705114862] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:07:07,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305159101] [2021-10-28 23:07:07,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:07:07,999 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:07:07,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:08,000 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:07:08,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-28 23:07:08,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:07:08,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:07:08,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 23:07:08,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:07:09,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1759 backedges. 1033 proven. 206 refuted. 0 times theorem prover too weak. 520 trivial. 0 not checked. [2021-10-28 23:07:09,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305159101] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:07:09,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:07:09,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11] total 30 [2021-10-28 23:07:09,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103394193] [2021-10-28 23:07:09,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-28 23:07:09,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:07:09,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-28 23:07:09,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=639, Unknown=0, NotChecked=0, Total=870 [2021-10-28 23:07:09,047 INFO L87 Difference]: Start difference. First operand 803 states and 903 transitions. Second operand has 30 states, 30 states have (on average 3.6666666666666665) internal successors, (110), 30 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:07:10,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:07:10,845 INFO L93 Difference]: Finished difference Result 1871 states and 2087 transitions. [2021-10-28 23:07:10,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-10-28 23:07:10,846 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.6666666666666665) internal successors, (110), 30 states have internal predecessors, (110), 0 states have call successors, (0), 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 [2021-10-28 23:07:10,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:07:10,854 INFO L225 Difference]: With dead ends: 1871 [2021-10-28 23:07:10,854 INFO L226 Difference]: Without dead ends: 1215 [2021-10-28 23:07:10,858 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1679 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1937, Invalid=5035, Unknown=0, NotChecked=0, Total=6972 [2021-10-28 23:07:10,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2021-10-28 23:07:10,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 793. [2021-10-28 23:07:11,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 792 states have (on average 1.1161616161616161) internal successors, (884), 792 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:07:11,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 884 transitions. [2021-10-28 23:07:11,003 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 884 transitions. Word has length 123 [2021-10-28 23:07:11,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:07:11,004 INFO L470 AbstractCegarLoop]: Abstraction has 793 states and 884 transitions. [2021-10-28 23:07:11,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.6666666666666665) internal successors, (110), 30 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:07:11,004 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 884 transitions. [2021-10-28 23:07:11,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-10-28 23:07:11,007 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:07:11,007 INFO L513 BasicCegarLoop]: trace histogram [36, 36, 21, 15, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:07:11,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:11,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-28 23:07:11,226 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:07:11,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:07:11,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1151168365, now seen corresponding path program 5 times [2021-10-28 23:07:11,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:07:11,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539760298] [2021-10-28 23:07:11,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:07:11,227 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:07:11,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:11,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1970 backedges. 1010 proven. 477 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2021-10-28 23:07:11,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:07:11,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539760298] [2021-10-28 23:07:11,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539760298] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:07:11,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538856657] [2021-10-28 23:07:11,604 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:07:11,605 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:07:11,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:11,606 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:07:11,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-28 23:07:12,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-10-28 23:07:12,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:07:12,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-28 23:07:12,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:07:13,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1970 backedges. 1257 proven. 451 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2021-10-28 23:07:13,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538856657] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:07:13,489 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:07:13,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 25] total 45 [2021-10-28 23:07:13,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414101963] [2021-10-28 23:07:13,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-10-28 23:07:13,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:07:13,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-10-28 23:07:13,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=427, Invalid=1553, Unknown=0, NotChecked=0, Total=1980 [2021-10-28 23:07:13,492 INFO L87 Difference]: Start difference. First operand 793 states and 884 transitions. Second operand has 45 states, 45 states have (on average 3.4444444444444446) internal successors, (155), 45 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:07:15,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:07:15,450 INFO L93 Difference]: Finished difference Result 1897 states and 2110 transitions. [2021-10-28 23:07:15,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-10-28 23:07:15,451 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.4444444444444446) internal successors, (155), 45 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2021-10-28 23:07:15,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:07:15,457 INFO L225 Difference]: With dead ends: 1897 [2021-10-28 23:07:15,457 INFO L226 Difference]: Without dead ends: 1251 [2021-10-28 23:07:15,462 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2803 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2325, Invalid=7977, Unknown=0, NotChecked=0, Total=10302 [2021-10-28 23:07:15,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2021-10-28 23:07:15,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1003. [2021-10-28 23:07:15,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 1002 states have (on average 1.1047904191616766) internal successors, (1107), 1002 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:07:15,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1107 transitions. [2021-10-28 23:07:15,637 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1107 transitions. Word has length 129 [2021-10-28 23:07:15,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:07:15,637 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 1107 transitions. [2021-10-28 23:07:15,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.4444444444444446) internal successors, (155), 45 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:07:15,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1107 transitions. [2021-10-28 23:07:15,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-10-28 23:07:15,645 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:07:15,645 INFO L513 BasicCegarLoop]: trace histogram [38, 38, 23, 15, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:07:15,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:15,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:07:15,864 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:07:15,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:07:15,865 INFO L85 PathProgramCache]: Analyzing trace with hash 244793185, now seen corresponding path program 6 times [2021-10-28 23:07:15,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:07:15,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251308439] [2021-10-28 23:07:15,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:07:15,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:07:15,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:16,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2193 backedges. 1123 proven. 532 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2021-10-28 23:07:16,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:07:16,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251308439] [2021-10-28 23:07:16,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251308439] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:07:16,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444795455] [2021-10-28 23:07:16,210 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:07:16,211 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:07:16,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:16,216 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:07:16,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-28 23:07:16,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-28 23:07:16,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:07:16,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-28 23:07:16,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:07:18,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2193 backedges. 247 proven. 1141 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-10-28 23:07:18,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444795455] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:07:18,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:07:18,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 9] total 30 [2021-10-28 23:07:18,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879501320] [2021-10-28 23:07:18,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-28 23:07:18,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:07:18,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-28 23:07:18,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=618, Unknown=0, NotChecked=0, Total=870 [2021-10-28 23:07:18,432 INFO L87 Difference]: Start difference. First operand 1003 states and 1107 transitions. Second operand has 30 states, 30 states have (on average 3.7) internal successors, (111), 30 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:07:21,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:07:21,985 INFO L93 Difference]: Finished difference Result 2162 states and 2408 transitions. [2021-10-28 23:07:21,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-10-28 23:07:21,986 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.7) internal successors, (111), 30 states have internal predecessors, (111), 0 states have call successors, (0), 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 135 [2021-10-28 23:07:21,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:07:21,994 INFO L225 Difference]: With dead ends: 2162 [2021-10-28 23:07:21,994 INFO L226 Difference]: Without dead ends: 1354 [2021-10-28 23:07:22,001 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5858 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3764, Invalid=14326, Unknown=0, NotChecked=0, Total=18090 [2021-10-28 23:07:22,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2021-10-28 23:07:22,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1117. [2021-10-28 23:07:22,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 1116 states have (on average 1.1155913978494623) internal successors, (1245), 1116 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:07:22,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 1245 transitions. [2021-10-28 23:07:22,136 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 1245 transitions. Word has length 135 [2021-10-28 23:07:22,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:07:22,137 INFO L470 AbstractCegarLoop]: Abstraction has 1117 states and 1245 transitions. [2021-10-28 23:07:22,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.7) internal successors, (111), 30 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:07:22,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 1245 transitions. [2021-10-28 23:07:22,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-10-28 23:07:22,140 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:07:22,141 INFO L513 BasicCegarLoop]: trace histogram [40, 40, 38, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:07:22,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-10-28 23:07:22,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:07:22,352 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:07:22,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:07:22,353 INFO L85 PathProgramCache]: Analyzing trace with hash 525616749, now seen corresponding path program 1 times [2021-10-28 23:07:22,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:07:22,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836597615] [2021-10-28 23:07:22,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:07:22,355 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:07:22,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:23,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2428 backedges. 0 proven. 1858 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2021-10-28 23:07:23,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:07:23,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836597615] [2021-10-28 23:07:23,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836597615] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:07:23,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506749834] [2021-10-28 23:07:23,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:07:23,177 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:07:23,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:23,178 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:07:23,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-28 23:07:24,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:24,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-28 23:07:24,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:07:26,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2428 backedges. 0 proven. 1838 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-10-28 23:07:26,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506749834] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:07:26,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:07:26,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 54 [2021-10-28 23:07:26,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360387735] [2021-10-28 23:07:26,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-10-28 23:07:26,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:07:26,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-10-28 23:07:26,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=2359, Unknown=0, NotChecked=0, Total=2970 [2021-10-28 23:07:26,501 INFO L87 Difference]: Start difference. First operand 1117 states and 1245 transitions. Second operand has 55 states, 55 states have (on average 3.018181818181818) internal successors, (166), 54 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:07:30,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:07:30,185 INFO L93 Difference]: Finished difference Result 1938 states and 2125 transitions. [2021-10-28 23:07:30,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-10-28 23:07:30,185 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.018181818181818) internal successors, (166), 54 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-10-28 23:07:30,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:07:30,193 INFO L225 Difference]: With dead ends: 1938 [2021-10-28 23:07:30,193 INFO L226 Difference]: Without dead ends: 1790 [2021-10-28 23:07:30,195 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5804 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2911, Invalid=16271, Unknown=0, NotChecked=0, Total=19182 [2021-10-28 23:07:30,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2021-10-28 23:07:30,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1421. [2021-10-28 23:07:30,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1421 states, 1420 states have (on average 1.1119718309859155) internal successors, (1579), 1420 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:07:30,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1421 states to 1421 states and 1579 transitions. [2021-10-28 23:07:30,367 INFO L78 Accepts]: Start accepts. Automaton has 1421 states and 1579 transitions. Word has length 141 [2021-10-28 23:07:30,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:07:30,367 INFO L470 AbstractCegarLoop]: Abstraction has 1421 states and 1579 transitions. [2021-10-28 23:07:30,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.018181818181818) internal successors, (166), 54 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:07:30,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1421 states and 1579 transitions. [2021-10-28 23:07:30,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-10-28 23:07:30,371 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:07:30,371 INFO L513 BasicCegarLoop]: trace histogram [40, 40, 39, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:07:30,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:30,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:07:30,592 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:07:30,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:07:30,593 INFO L85 PathProgramCache]: Analyzing trace with hash 714830123, now seen corresponding path program 2 times [2021-10-28 23:07:30,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:07:30,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733361566] [2021-10-28 23:07:30,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:07:30,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:07:30,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:31,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2428 backedges. 587 proven. 1841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:07:31,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:07:31,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733361566] [2021-10-28 23:07:31,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733361566] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:07:31,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520410612] [2021-10-28 23:07:31,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:07:31,501 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:07:31,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:31,502 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:07:31,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-28 23:07:32,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:07:32,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:07:32,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-28 23:07:32,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:07:33,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2428 backedges. 86 proven. 1752 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-10-28 23:07:33,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520410612] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:07:33,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:07:33,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 23] total 64 [2021-10-28 23:07:33,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848041133] [2021-10-28 23:07:33,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-10-28 23:07:33,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:07:33,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-10-28 23:07:33,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=927, Invalid=3105, Unknown=0, NotChecked=0, Total=4032 [2021-10-28 23:07:33,773 INFO L87 Difference]: Start difference. First operand 1421 states and 1579 transitions. Second operand has 64 states, 64 states have (on average 3.328125) internal successors, (213), 64 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:07:36,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:07:36,282 INFO L93 Difference]: Finished difference Result 2544 states and 2842 transitions. [2021-10-28 23:07:36,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-10-28 23:07:36,283 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.328125) internal successors, (213), 64 states have internal predecessors, (213), 0 states have call successors, (0), 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 141 [2021-10-28 23:07:36,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:07:36,293 INFO L225 Difference]: With dead ends: 2544 [2021-10-28 23:07:36,294 INFO L226 Difference]: Without dead ends: 1654 [2021-10-28 23:07:36,297 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4030 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3100, Invalid=12400, Unknown=0, NotChecked=0, Total=15500 [2021-10-28 23:07:36,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1654 states. [2021-10-28 23:07:36,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1654 to 1640. [2021-10-28 23:07:36,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 1.0835875533862112) internal successors, (1776), 1639 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:07:36,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 1776 transitions. [2021-10-28 23:07:36,534 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 1776 transitions. Word has length 141 [2021-10-28 23:07:36,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:07:36,535 INFO L470 AbstractCegarLoop]: Abstraction has 1640 states and 1776 transitions. [2021-10-28 23:07:36,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.328125) internal successors, (213), 64 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:07:36,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 1776 transitions. [2021-10-28 23:07:36,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-10-28 23:07:36,540 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:07:36,541 INFO L513 BasicCegarLoop]: trace histogram [40, 40, 40, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:07:36,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:36,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-10-28 23:07:36,768 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:07:36,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:07:36,769 INFO L85 PathProgramCache]: Analyzing trace with hash 2094903851, now seen corresponding path program 1 times [2021-10-28 23:07:36,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:07:36,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892820429] [2021-10-28 23:07:36,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:07:36,769 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:07:36,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:36,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2428 backedges. 2 proven. 1246 refuted. 0 times theorem prover too weak. 1180 trivial. 0 not checked. [2021-10-28 23:07:36,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:07:36,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892820429] [2021-10-28 23:07:36,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892820429] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:07:36,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093167901] [2021-10-28 23:07:36,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:07:36,911 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:07:36,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:36,912 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:07:36,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-28 23:07:38,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:38,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 23:07:38,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:07:38,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2428 backedges. 2 proven. 1246 refuted. 0 times theorem prover too weak. 1180 trivial. 0 not checked. [2021-10-28 23:07:38,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093167901] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:07:38,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:07:38,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-10-28 23:07:38,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910591310] [2021-10-28 23:07:38,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:07:38,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:07:38,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:07:38,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:07:38,956 INFO L87 Difference]: Start difference. First operand 1640 states and 1776 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:07:39,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:07:39,212 INFO L93 Difference]: Finished difference Result 1796 states and 1938 transitions. [2021-10-28 23:07:39,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 23:07:39,212 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 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 141 [2021-10-28 23:07:39,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:07:39,220 INFO L225 Difference]: With dead ends: 1796 [2021-10-28 23:07:39,220 INFO L226 Difference]: Without dead ends: 1720 [2021-10-28 23:07:39,221 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:07:39,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1720 states. [2021-10-28 23:07:39,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1720 to 1714. [2021-10-28 23:07:39,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1714 states, 1713 states have (on average 1.0817279626386456) internal successors, (1853), 1713 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:07:39,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1714 states to 1714 states and 1853 transitions. [2021-10-28 23:07:39,406 INFO L78 Accepts]: Start accepts. Automaton has 1714 states and 1853 transitions. Word has length 141 [2021-10-28 23:07:39,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:07:39,407 INFO L470 AbstractCegarLoop]: Abstraction has 1714 states and 1853 transitions. [2021-10-28 23:07:39,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:07:39,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1714 states and 1853 transitions. [2021-10-28 23:07:39,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-10-28 23:07:39,410 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:07:39,411 INFO L513 BasicCegarLoop]: trace histogram [41, 41, 40, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:07:39,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:39,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-10-28 23:07:39,624 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:07:39,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:07:39,624 INFO L85 PathProgramCache]: Analyzing trace with hash 574504483, now seen corresponding path program 7 times [2021-10-28 23:07:39,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:07:39,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505797126] [2021-10-28 23:07:39,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:07:39,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:07:39,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:40,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 701 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:07:40,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:07:40,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505797126] [2021-10-28 23:07:40,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505797126] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:07:40,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120527750] [2021-10-28 23:07:40,540 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:07:40,541 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:07:40,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:40,542 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:07:40,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-28 23:07:41,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:41,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-28 23:07:41,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:07:43,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 797 proven. 1751 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 23:07:43,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120527750] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:07:43,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:07:43,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 65 [2021-10-28 23:07:43,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555203188] [2021-10-28 23:07:43,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-10-28 23:07:43,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:07:43,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-10-28 23:07:43,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=950, Invalid=3210, Unknown=0, NotChecked=0, Total=4160 [2021-10-28 23:07:43,094 INFO L87 Difference]: Start difference. First operand 1714 states and 1853 transitions. Second operand has 65 states, 65 states have (on average 3.230769230769231) internal successors, (210), 65 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) [2021-10-28 23:07:45,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:07:45,739 INFO L93 Difference]: Finished difference Result 2006 states and 2163 transitions. [2021-10-28 23:07:45,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-10-28 23:07:45,741 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.230769230769231) internal successors, (210), 65 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 144 [2021-10-28 23:07:45,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:07:45,749 INFO L225 Difference]: With dead ends: 2006 [2021-10-28 23:07:45,749 INFO L226 Difference]: Without dead ends: 1701 [2021-10-28 23:07:45,753 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7016 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=5539, Invalid=19583, Unknown=0, NotChecked=0, Total=25122 [2021-10-28 23:07:45,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2021-10-28 23:07:45,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 1566. [2021-10-28 23:07:45,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1565 states have (on average 1.0830670926517572) internal successors, (1695), 1565 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:07:45,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 1695 transitions. [2021-10-28 23:07:45,945 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 1695 transitions. Word has length 144 [2021-10-28 23:07:45,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:07:45,946 INFO L470 AbstractCegarLoop]: Abstraction has 1566 states and 1695 transitions. [2021-10-28 23:07:45,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.230769230769231) internal successors, (210), 65 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) [2021-10-28 23:07:45,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 1695 transitions. [2021-10-28 23:07:45,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-10-28 23:07:45,949 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:07:45,949 INFO L513 BasicCegarLoop]: trace histogram [41, 41, 40, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:07:45,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:46,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:07:46,164 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:07:46,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:07:46,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1051056613, now seen corresponding path program 3 times [2021-10-28 23:07:46,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:07:46,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853193334] [2021-10-28 23:07:46,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:07:46,165 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:07:46,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:46,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 721 proven. 1238 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2021-10-28 23:07:46,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:07:46,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853193334] [2021-10-28 23:07:46,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853193334] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:07:46,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864584800] [2021-10-28 23:07:46,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:07:46,579 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:07:46,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:46,581 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:07:46,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-28 23:07:48,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-28 23:07:48,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:07:48,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 23:07:48,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:07:48,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 1350 proven. 20 refuted. 0 times theorem prover too weak. 1180 trivial. 0 not checked. [2021-10-28 23:07:48,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864584800] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:07:48,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:07:48,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 4] total 26 [2021-10-28 23:07:48,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452676934] [2021-10-28 23:07:48,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-28 23:07:48,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:07:48,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-28 23:07:48,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-10-28 23:07:48,533 INFO L87 Difference]: Start difference. First operand 1566 states and 1695 transitions. Second operand has 26 states, 26 states have (on average 4.153846153846154) internal successors, (108), 26 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:07:50,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:07:50,532 INFO L93 Difference]: Finished difference Result 2515 states and 2719 transitions. [2021-10-28 23:07:50,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-10-28 23:07:50,533 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.153846153846154) internal successors, (108), 26 states have internal predecessors, (108), 0 states have call successors, (0), 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 144 [2021-10-28 23:07:50,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:07:50,538 INFO L225 Difference]: With dead ends: 2515 [2021-10-28 23:07:50,539 INFO L226 Difference]: Without dead ends: 1151 [2021-10-28 23:07:50,542 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2361 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3000, Invalid=8130, Unknown=0, NotChecked=0, Total=11130 [2021-10-28 23:07:50,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2021-10-28 23:07:50,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 1145. [2021-10-28 23:07:50,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 1144 states have (on average 1.06993006993007) internal successors, (1224), 1144 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:07:50,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 1224 transitions. [2021-10-28 23:07:50,729 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 1224 transitions. Word has length 144 [2021-10-28 23:07:50,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:07:50,730 INFO L470 AbstractCegarLoop]: Abstraction has 1145 states and 1224 transitions. [2021-10-28 23:07:50,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.153846153846154) internal successors, (108), 26 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:07:50,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 1224 transitions. [2021-10-28 23:07:50,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-10-28 23:07:50,741 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:07:50,742 INFO L513 BasicCegarLoop]: trace histogram [60, 60, 57, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-10-28 23:07:50,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:50,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:07:50,968 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:07:50,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:07:50,969 INFO L85 PathProgramCache]: Analyzing trace with hash -668312775, now seen corresponding path program 4 times [2021-10-28 23:07:50,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:07:50,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620939255] [2021-10-28 23:07:50,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:07:50,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:07:51,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:51,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5514 backedges. 61 proven. 4267 refuted. 0 times theorem prover too weak. 1186 trivial. 0 not checked. [2021-10-28 23:07:51,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:07:51,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620939255] [2021-10-28 23:07:51,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620939255] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:07:51,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785561406] [2021-10-28 23:07:51,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:07:51,734 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:07:51,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:51,735 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:07:51,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-28 23:07:53,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:07:53,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:07:53,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 62 conjunts are in the unsatisfiable core [2021-10-28 23:07:53,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:07:56,842 INFO L134 CoverageAnalysis]: Checked inductivity of 5514 backedges. 532 proven. 4392 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-10-28 23:07:56,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785561406] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:07:56,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:07:56,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 50] total 75 [2021-10-28 23:07:56,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694896538] [2021-10-28 23:07:56,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-10-28 23:07:56,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:07:56,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-10-28 23:07:56,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1092, Invalid=4458, Unknown=0, NotChecked=0, Total=5550 [2021-10-28 23:07:56,846 INFO L87 Difference]: Start difference. First operand 1145 states and 1224 transitions. Second operand has 75 states, 75 states have (on average 3.2133333333333334) internal successors, (241), 75 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:08:00,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:08:00,818 INFO L93 Difference]: Finished difference Result 1676 states and 1791 transitions. [2021-10-28 23:08:00,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-10-28 23:08:00,819 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.2133333333333334) internal successors, (241), 75 states have internal predecessors, (241), 0 states have call successors, (0), 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 209 [2021-10-28 23:08:00,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:08:00,823 INFO L225 Difference]: With dead ends: 1676 [2021-10-28 23:08:00,823 INFO L226 Difference]: Without dead ends: 768 [2021-10-28 23:08:00,827 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10117 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=4357, Invalid=23699, Unknown=0, NotChecked=0, Total=28056 [2021-10-28 23:08:00,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2021-10-28 23:08:00,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 346. [2021-10-28 23:08:00,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 1.0231884057971015) internal successors, (353), 345 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:08:00,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 353 transitions. [2021-10-28 23:08:00,875 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 353 transitions. Word has length 209 [2021-10-28 23:08:00,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:08:00,875 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 353 transitions. [2021-10-28 23:08:00,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.2133333333333334) internal successors, (241), 75 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:08:00,875 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 353 transitions. [2021-10-28 23:08:00,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-10-28 23:08:00,877 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:08:00,877 INFO L513 BasicCegarLoop]: trace histogram [60, 60, 60, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:08:00,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-10-28 23:08:01,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-10-28 23:08:01,088 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:08:01,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:08:01,089 INFO L85 PathProgramCache]: Analyzing trace with hash -2084159889, now seen corresponding path program 2 times [2021-10-28 23:08:01,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:08:01,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244029269] [2021-10-28 23:08:01,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:08:01,089 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:08:01,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:08:01,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5514 backedges. 4 proven. 3740 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2021-10-28 23:08:01,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:08:01,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244029269] [2021-10-28 23:08:01,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244029269] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:08:01,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512108484] [2021-10-28 23:08:01,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:08:01,209 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:08:01,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:08:01,210 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:08:01,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-28 23:08:03,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:08:03,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:08:03,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 23:08:03,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:08:04,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5514 backedges. 4 proven. 3740 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2021-10-28 23:08:04,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512108484] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:08:04,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:08:04,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-28 23:08:04,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427078749] [2021-10-28 23:08:04,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 23:08:04,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:08:04,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 23:08:04,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:08:04,570 INFO L87 Difference]: Start difference. First operand 346 states and 353 transitions. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:08:04,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:08:04,639 INFO L93 Difference]: Finished difference Result 484 states and 495 transitions. [2021-10-28 23:08:04,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:08:04,640 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 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 209 [2021-10-28 23:08:04,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:08:04,642 INFO L225 Difference]: With dead ends: 484 [2021-10-28 23:08:04,643 INFO L226 Difference]: Without dead ends: 414 [2021-10-28 23:08:04,643 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:08:04,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-10-28 23:08:04,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 414. [2021-10-28 23:08:04,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.0217917675544794) internal successors, (422), 413 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:08:04,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 422 transitions. [2021-10-28 23:08:04,670 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 422 transitions. Word has length 209 [2021-10-28 23:08:04,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:08:04,671 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 422 transitions. [2021-10-28 23:08:04,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:08:04,671 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 422 transitions. [2021-10-28 23:08:04,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2021-10-28 23:08:04,704 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:08:04,704 INFO L513 BasicCegarLoop]: trace histogram [80, 80, 80, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:08:04,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-10-28 23:08:04,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-28 23:08:04,905 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:08:04,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:08:04,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1255336115, now seen corresponding path program 3 times [2021-10-28 23:08:04,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:08:04,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809592167] [2021-10-28 23:08:04,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:08:04,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:08:04,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:08:05,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9848 backedges. 6 proven. 7482 refuted. 0 times theorem prover too weak. 2360 trivial. 0 not checked. [2021-10-28 23:08:05,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:08:05,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809592167] [2021-10-28 23:08:05,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809592167] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:08:05,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539528840] [2021-10-28 23:08:05,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:08:05,066 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:08:05,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:08:05,067 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:08:05,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-28 23:08:07,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2021-10-28 23:08:07,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:08:07,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 23:08:07,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:08:09,316 INFO L134 CoverageAnalysis]: Checked inductivity of 9848 backedges. 6 proven. 7482 refuted. 0 times theorem prover too weak. 2360 trivial. 0 not checked. [2021-10-28 23:08:09,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539528840] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:08:09,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:08:09,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-28 23:08:09,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228196135] [2021-10-28 23:08:09,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 23:08:09,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:08:09,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 23:08:09,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-10-28 23:08:09,320 INFO L87 Difference]: Start difference. First operand 414 states and 422 transitions. Second operand has 13 states, 13 states have (on average 7.076923076923077) internal successors, (92), 12 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:08:09,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:08:09,441 INFO L93 Difference]: Finished difference Result 552 states and 564 transitions. [2021-10-28 23:08:09,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 23:08:09,441 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.076923076923077) internal successors, (92), 12 states have internal predecessors, (92), 0 states have call successors, (0), 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 [2021-10-28 23:08:09,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:08:09,445 INFO L225 Difference]: With dead ends: 552 [2021-10-28 23:08:09,446 INFO L226 Difference]: Without dead ends: 482 [2021-10-28 23:08:09,446 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-10-28 23:08:09,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-10-28 23:08:09,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 482. [2021-10-28 23:08:09,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 1.0207900207900207) internal successors, (491), 481 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:08:09,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 491 transitions. [2021-10-28 23:08:09,489 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 491 transitions. Word has length 277 [2021-10-28 23:08:09,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:08:09,492 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 491 transitions. [2021-10-28 23:08:09,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.076923076923077) internal successors, (92), 12 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:08:09,492 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 491 transitions. [2021-10-28 23:08:09,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2021-10-28 23:08:09,495 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:08:09,495 INFO L513 BasicCegarLoop]: trace histogram [100, 100, 100, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:08:09,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-10-28 23:08:09,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-28 23:08:09,720 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:08:09,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:08:09,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1898663689, now seen corresponding path program 4 times [2021-10-28 23:08:09,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:08:09,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920042821] [2021-10-28 23:08:09,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:08:09,721 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:08:09,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:08:09,906 INFO L134 CoverageAnalysis]: Checked inductivity of 15430 backedges. 8 proven. 12472 refuted. 0 times theorem prover too weak. 2950 trivial. 0 not checked. [2021-10-28 23:08:09,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:08:09,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920042821] [2021-10-28 23:08:09,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920042821] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:08:09,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191672172] [2021-10-28 23:08:09,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:08:09,908 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:08:09,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:08:09,909 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:08:09,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-28 23:08:11,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:08:11,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:08:11,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-28 23:08:11,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:08:14,585 INFO L134 CoverageAnalysis]: Checked inductivity of 15430 backedges. 540 proven. 12530 refuted. 0 times theorem prover too weak. 2360 trivial. 0 not checked. [2021-10-28 23:08:14,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191672172] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:08:14,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:08:14,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 29] total 36 [2021-10-28 23:08:14,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085563564] [2021-10-28 23:08:14,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-28 23:08:14,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:08:14,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-28 23:08:14,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=916, Unknown=0, NotChecked=0, Total=1260 [2021-10-28 23:08:14,589 INFO L87 Difference]: Start difference. First operand 482 states and 491 transitions. Second operand has 36 states, 36 states have (on average 4.833333333333333) internal successors, (174), 36 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:08:15,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:08:15,180 INFO L93 Difference]: Finished difference Result 621 states and 634 transitions. [2021-10-28 23:08:15,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-28 23:08:15,180 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.833333333333333) internal successors, (174), 36 states have internal predecessors, (174), 0 states have call successors, (0), 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 345 [2021-10-28 23:08:15,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:08:15,183 INFO L225 Difference]: With dead ends: 621 [2021-10-28 23:08:15,183 INFO L226 Difference]: Without dead ends: 551 [2021-10-28 23:08:15,184 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1064, Invalid=2016, Unknown=0, NotChecked=0, Total=3080 [2021-10-28 23:08:15,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-10-28 23:08:15,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 550. [2021-10-28 23:08:15,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 549 states have (on average 1.0200364298724955) internal successors, (560), 549 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:08:15,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 560 transitions. [2021-10-28 23:08:15,246 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 560 transitions. Word has length 345 [2021-10-28 23:08:15,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:08:15,246 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 560 transitions. [2021-10-28 23:08:15,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.833333333333333) internal successors, (174), 36 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:08:15,247 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 560 transitions. [2021-10-28 23:08:15,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2021-10-28 23:08:15,249 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:08:15,249 INFO L513 BasicCegarLoop]: trace histogram [120, 120, 120, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:08:15,280 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-10-28 23:08:15,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-28 23:08:15,450 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:08:15,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:08:15,450 INFO L85 PathProgramCache]: Analyzing trace with hash 874288955, now seen corresponding path program 5 times [2021-10-28 23:08:15,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:08:15,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252312752] [2021-10-28 23:08:15,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:08:15,451 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:08:15,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:08:15,695 INFO L134 CoverageAnalysis]: Checked inductivity of 22260 backedges. 10 proven. 18710 refuted. 0 times theorem prover too weak. 3540 trivial. 0 not checked. [2021-10-28 23:08:15,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:08:15,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252312752] [2021-10-28 23:08:15,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252312752] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:08:15,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903831820] [2021-10-28 23:08:15,697 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:08:15,697 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:08:15,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:08:15,698 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:08:15,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-28 23:08:18,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 85 check-sat command(s) [2021-10-28 23:08:18,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:08:18,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-28 23:08:18,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:08:21,189 INFO L134 CoverageAnalysis]: Checked inductivity of 22260 backedges. 580 proven. 18730 refuted. 0 times theorem prover too weak. 2950 trivial. 0 not checked. [2021-10-28 23:08:21,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903831820] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:08:21,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:08:21,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 31] total 39 [2021-10-28 23:08:21,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420921737] [2021-10-28 23:08:21,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-28 23:08:21,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:08:21,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-28 23:08:21,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=1089, Unknown=0, NotChecked=0, Total=1482 [2021-10-28 23:08:21,193 INFO L87 Difference]: Start difference. First operand 550 states and 560 transitions. Second operand has 39 states, 39 states have (on average 5.0256410256410255) internal successors, (196), 39 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:08:22,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:08:22,169 INFO L93 Difference]: Finished difference Result 689 states and 703 transitions. [2021-10-28 23:08:22,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-10-28 23:08:22,170 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.0256410256410255) internal successors, (196), 39 states have internal predecessors, (196), 0 states have call successors, (0), 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 413 [2021-10-28 23:08:22,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:08:22,174 INFO L225 Difference]: With dead ends: 689 [2021-10-28 23:08:22,174 INFO L226 Difference]: Without dead ends: 619 [2021-10-28 23:08:22,175 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2182, Invalid=4138, Unknown=0, NotChecked=0, Total=6320 [2021-10-28 23:08:22,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-10-28 23:08:22,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 618. [2021-10-28 23:08:22,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 617 states have (on average 1.019448946515397) internal successors, (629), 617 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:08:22,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 629 transitions. [2021-10-28 23:08:22,222 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 629 transitions. Word has length 413 [2021-10-28 23:08:22,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:08:22,223 INFO L470 AbstractCegarLoop]: Abstraction has 618 states and 629 transitions. [2021-10-28 23:08:22,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 5.0256410256410255) internal successors, (196), 39 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:08:22,223 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 629 transitions. [2021-10-28 23:08:22,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2021-10-28 23:08:22,228 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:08:22,229 INFO L513 BasicCegarLoop]: trace histogram [140, 140, 140, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:08:22,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-10-28 23:08:22,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:08:22,431 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:08:22,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:08:22,432 INFO L85 PathProgramCache]: Analyzing trace with hash -2038719617, now seen corresponding path program 6 times [2021-10-28 23:08:22,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:08:22,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216431364] [2021-10-28 23:08:22,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:08:22,432 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:08:22,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:08:22,699 INFO L134 CoverageAnalysis]: Checked inductivity of 30338 backedges. 12 proven. 26196 refuted. 0 times theorem prover too weak. 4130 trivial. 0 not checked. [2021-10-28 23:08:22,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:08:22,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216431364] [2021-10-28 23:08:22,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216431364] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:08:22,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802976236] [2021-10-28 23:08:22,701 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:08:22,701 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:08:22,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:08:22,702 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:08:22,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-28 23:08:25,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 65 check-sat command(s) [2021-10-28 23:08:25,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:08:25,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 23:08:25,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:08:28,641 INFO L134 CoverageAnalysis]: Checked inductivity of 30338 backedges. 12 proven. 26196 refuted. 0 times theorem prover too weak. 4130 trivial. 0 not checked. [2021-10-28 23:08:28,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802976236] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:08:28,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:08:28,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-10-28 23:08:28,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457071316] [2021-10-28 23:08:28,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 23:08:28,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:08:28,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 23:08:28,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-10-28 23:08:28,645 INFO L87 Difference]: Start difference. First operand 618 states and 629 transitions. Second operand has 19 states, 19 states have (on average 8.31578947368421) internal successors, (158), 18 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:08:28,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:08:28,782 INFO L93 Difference]: Finished difference Result 756 states and 771 transitions. [2021-10-28 23:08:28,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 23:08:28,782 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 8.31578947368421) internal successors, (158), 18 states have internal predecessors, (158), 0 states have call successors, (0), 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 481 [2021-10-28 23:08:28,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:08:28,787 INFO L225 Difference]: With dead ends: 756 [2021-10-28 23:08:28,788 INFO L226 Difference]: Without dead ends: 686 [2021-10-28 23:08:28,788 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-10-28 23:08:28,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-10-28 23:08:28,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 686. [2021-10-28 23:08:28,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 685 states have (on average 1.018978102189781) internal successors, (698), 685 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:08:28,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 698 transitions. [2021-10-28 23:08:28,849 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 698 transitions. Word has length 481 [2021-10-28 23:08:28,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:08:28,850 INFO L470 AbstractCegarLoop]: Abstraction has 686 states and 698 transitions. [2021-10-28 23:08:28,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 8.31578947368421) internal successors, (158), 18 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:08:28,851 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 698 transitions. [2021-10-28 23:08:28,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 550 [2021-10-28 23:08:28,855 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:08:28,856 INFO L513 BasicCegarLoop]: trace histogram [160, 160, 160, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:08:28,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-10-28 23:08:29,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:08:29,072 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:08:29,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:08:29,073 INFO L85 PathProgramCache]: Analyzing trace with hash 2034417091, now seen corresponding path program 7 times [2021-10-28 23:08:29,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:08:29,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628796886] [2021-10-28 23:08:29,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:08:29,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:08:29,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:08:29,389 INFO L134 CoverageAnalysis]: Checked inductivity of 39664 backedges. 14 proven. 34930 refuted. 0 times theorem prover too weak. 4720 trivial. 0 not checked. [2021-10-28 23:08:29,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:08:29,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628796886] [2021-10-28 23:08:29,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628796886] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:08:29,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272467509] [2021-10-28 23:08:29,390 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:08:29,390 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:08:29,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:08:29,392 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:08:29,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-28 23:08:32,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:08:32,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 877 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 23:08:32,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:08:35,916 INFO L134 CoverageAnalysis]: Checked inductivity of 39664 backedges. 14 proven. 34930 refuted. 0 times theorem prover too weak. 4720 trivial. 0 not checked. [2021-10-28 23:08:35,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272467509] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:08:35,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:08:35,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-10-28 23:08:35,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938243150] [2021-10-28 23:08:35,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-28 23:08:35,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:08:35,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-28 23:08:35,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-10-28 23:08:35,920 INFO L87 Difference]: Start difference. First operand 686 states and 698 transitions. Second operand has 21 states, 21 states have (on average 8.571428571428571) internal successors, (180), 20 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) [2021-10-28 23:08:36,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:08:36,063 INFO L93 Difference]: Finished difference Result 824 states and 840 transitions. [2021-10-28 23:08:36,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 23:08:36,063 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 8.571428571428571) internal successors, (180), 20 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 549 [2021-10-28 23:08:36,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:08:36,068 INFO L225 Difference]: With dead ends: 824 [2021-10-28 23:08:36,068 INFO L226 Difference]: Without dead ends: 754 [2021-10-28 23:08:36,069 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 559 GetRequests, 540 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-10-28 23:08:36,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2021-10-28 23:08:36,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 754. [2021-10-28 23:08:36,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 1.0185922974767596) internal successors, (767), 753 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:08:36,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 767 transitions. [2021-10-28 23:08:36,116 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 767 transitions. Word has length 549 [2021-10-28 23:08:36,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:08:36,117 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 767 transitions. [2021-10-28 23:08:36,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 8.571428571428571) internal successors, (180), 20 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) [2021-10-28 23:08:36,118 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 767 transitions. [2021-10-28 23:08:36,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 618 [2021-10-28 23:08:36,123 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:08:36,124 INFO L513 BasicCegarLoop]: trace histogram [180, 180, 180, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:08:36,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-10-28 23:08:36,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-10-28 23:08:36,332 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:08:36,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:08:36,335 INFO L85 PathProgramCache]: Analyzing trace with hash -415039993, now seen corresponding path program 8 times [2021-10-28 23:08:36,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:08:36,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555913758] [2021-10-28 23:08:36,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:08:36,336 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:08:36,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:08:36,679 INFO L134 CoverageAnalysis]: Checked inductivity of 50238 backedges. 16 proven. 44912 refuted. 0 times theorem prover too weak. 5310 trivial. 0 not checked. [2021-10-28 23:08:36,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:08:36,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555913758] [2021-10-28 23:08:36,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555913758] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:08:36,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229824265] [2021-10-28 23:08:36,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:08:36,681 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:08:36,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:08:36,697 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:08:36,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-28 23:08:39,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:08:39,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:08:39,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 23:08:39,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:08:44,106 INFO L134 CoverageAnalysis]: Checked inductivity of 50238 backedges. 16 proven. 44912 refuted. 0 times theorem prover too weak. 5310 trivial. 0 not checked. [2021-10-28 23:08:44,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229824265] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:08:44,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:08:44,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-10-28 23:08:44,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373492987] [2021-10-28 23:08:44,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-28 23:08:44,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:08:44,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-28 23:08:44,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=298, Unknown=0, NotChecked=0, Total=506 [2021-10-28 23:08:44,109 INFO L87 Difference]: Start difference. First operand 754 states and 767 transitions. Second operand has 23 states, 23 states have (on average 8.782608695652174) internal successors, (202), 22 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:08:44,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:08:44,309 INFO L93 Difference]: Finished difference Result 892 states and 909 transitions. [2021-10-28 23:08:44,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 23:08:44,309 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 8.782608695652174) internal successors, (202), 22 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 617 [2021-10-28 23:08:44,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:08:44,313 INFO L225 Difference]: With dead ends: 892 [2021-10-28 23:08:44,313 INFO L226 Difference]: Without dead ends: 822 [2021-10-28 23:08:44,314 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 607 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=208, Invalid=298, Unknown=0, NotChecked=0, Total=506 [2021-10-28 23:08:44,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2021-10-28 23:08:44,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 822. [2021-10-28 23:08:44,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 1.0182704019488429) internal successors, (836), 821 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) [2021-10-28 23:08:44,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 836 transitions. [2021-10-28 23:08:44,373 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 836 transitions. Word has length 617 [2021-10-28 23:08:44,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:08:44,374 INFO L470 AbstractCegarLoop]: Abstraction has 822 states and 836 transitions. [2021-10-28 23:08:44,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 8.782608695652174) internal successors, (202), 22 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:08:44,374 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 836 transitions. [2021-10-28 23:08:44,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 686 [2021-10-28 23:08:44,378 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:08:44,378 INFO L513 BasicCegarLoop]: trace histogram [200, 200, 200, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:08:44,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-10-28 23:08:44,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:08:44,579 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:08:44,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:08:44,579 INFO L85 PathProgramCache]: Analyzing trace with hash -758293429, now seen corresponding path program 9 times [2021-10-28 23:08:44,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:08:44,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123316317] [2021-10-28 23:08:44,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:08:44,580 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:08:44,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:08:44,970 INFO L134 CoverageAnalysis]: Checked inductivity of 62060 backedges. 18 proven. 56142 refuted. 0 times theorem prover too weak. 5900 trivial. 0 not checked. [2021-10-28 23:08:44,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:08:44,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123316317] [2021-10-28 23:08:44,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123316317] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:08:44,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094562339] [2021-10-28 23:08:44,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:08:44,971 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:08:44,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:08:44,973 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:08:44,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-28 23:08:49,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 69 check-sat command(s) [2021-10-28 23:08:49,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:08:49,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 23:08:49,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:08:53,724 INFO L134 CoverageAnalysis]: Checked inductivity of 62060 backedges. 18 proven. 56142 refuted. 0 times theorem prover too weak. 5900 trivial. 0 not checked. [2021-10-28 23:08:53,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094562339] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:08:53,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:08:53,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-10-28 23:08:53,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948366064] [2021-10-28 23:08:53,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-28 23:08:53,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:08:53,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-28 23:08:53,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=355, Unknown=0, NotChecked=0, Total=600 [2021-10-28 23:08:53,727 INFO L87 Difference]: Start difference. First operand 822 states and 836 transitions. Second operand has 25 states, 25 states have (on average 8.96) internal successors, (224), 24 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:08:53,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:08:53,934 INFO L93 Difference]: Finished difference Result 960 states and 978 transitions. [2021-10-28 23:08:53,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 23:08:53,935 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 8.96) internal successors, (224), 24 states have internal predecessors, (224), 0 states have call successors, (0), 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 [2021-10-28 23:08:53,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:08:53,938 INFO L225 Difference]: With dead ends: 960 [2021-10-28 23:08:53,938 INFO L226 Difference]: Without dead ends: 890 [2021-10-28 23:08:53,939 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 697 GetRequests, 674 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=245, Invalid=355, Unknown=0, NotChecked=0, Total=600 [2021-10-28 23:08:53,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2021-10-28 23:08:53,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 890. [2021-10-28 23:08:53,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 1.0179977502812148) internal successors, (905), 889 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:08:53,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 905 transitions. [2021-10-28 23:08:53,988 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 905 transitions. Word has length 685 [2021-10-28 23:08:53,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:08:53,988 INFO L470 AbstractCegarLoop]: Abstraction has 890 states and 905 transitions. [2021-10-28 23:08:53,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 8.96) internal successors, (224), 24 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:08:53,989 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 905 transitions. [2021-10-28 23:08:53,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 754 [2021-10-28 23:08:53,993 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:08:53,993 INFO L513 BasicCegarLoop]: trace histogram [220, 220, 220, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:08:54,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-10-28 23:08:54,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-10-28 23:08:54,195 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:08:54,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:08:54,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1515005809, now seen corresponding path program 10 times [2021-10-28 23:08:54,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:08:54,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462938276] [2021-10-28 23:08:54,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:08:54,196 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:08:54,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:08:54,708 INFO L134 CoverageAnalysis]: Checked inductivity of 75130 backedges. 20 proven. 68620 refuted. 0 times theorem prover too weak. 6490 trivial. 0 not checked. [2021-10-28 23:08:54,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:08:54,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462938276] [2021-10-28 23:08:54,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462938276] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:08:54,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649254817] [2021-10-28 23:08:54,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:08:54,710 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:08:54,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:08:54,716 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:08:54,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-28 23:08:58,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:08:58,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:08:58,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 1142 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-28 23:08:58,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:09:04,579 INFO L134 CoverageAnalysis]: Checked inductivity of 75130 backedges. 552 proven. 68678 refuted. 0 times theorem prover too weak. 5900 trivial. 0 not checked. [2021-10-28 23:09:04,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649254817] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:09:04,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:09:04,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 35] total 48 [2021-10-28 23:09:04,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523195523] [2021-10-28 23:09:04,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-10-28 23:09:04,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:09:04,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-10-28 23:09:04,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=1717, Unknown=0, NotChecked=0, Total=2256 [2021-10-28 23:09:04,582 INFO L87 Difference]: Start difference. First operand 890 states and 905 transitions. Second operand has 48 states, 48 states have (on average 6.375) internal successors, (306), 48 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:09:05,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:09:05,234 INFO L93 Difference]: Finished difference Result 1029 states and 1048 transitions. [2021-10-28 23:09:05,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-28 23:09:05,234 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 6.375) internal successors, (306), 48 states have internal predecessors, (306), 0 states have call successors, (0), 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 753 [2021-10-28 23:09:05,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:09:05,237 INFO L225 Difference]: With dead ends: 1029 [2021-10-28 23:09:05,237 INFO L226 Difference]: Without dead ends: 959 [2021-10-28 23:09:05,239 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 786 GetRequests, 720 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1499, Invalid=3057, Unknown=0, NotChecked=0, Total=4556 [2021-10-28 23:09:05,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2021-10-28 23:09:05,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 958. [2021-10-28 23:09:05,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 957 states have (on average 1.0177638453500522) internal successors, (974), 957 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:09:05,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 974 transitions. [2021-10-28 23:09:05,293 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 974 transitions. Word has length 753 [2021-10-28 23:09:05,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:09:05,294 INFO L470 AbstractCegarLoop]: Abstraction has 958 states and 974 transitions. [2021-10-28 23:09:05,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 6.375) internal successors, (306), 48 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:09:05,294 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 974 transitions. [2021-10-28 23:09:05,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 822 [2021-10-28 23:09:05,302 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:09:05,302 INFO L513 BasicCegarLoop]: trace histogram [240, 240, 240, 12, 12, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:09:05,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-10-28 23:09:05,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-10-28 23:09:05,516 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:09:05,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:09:05,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1900311251, now seen corresponding path program 11 times [2021-10-28 23:09:05,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:09:05,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569855631] [2021-10-28 23:09:05,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:09:05,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:09:05,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:06,153 INFO L134 CoverageAnalysis]: Checked inductivity of 89448 backedges. 22 proven. 82346 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2021-10-28 23:09:06,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:09:06,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569855631] [2021-10-28 23:09:06,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569855631] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:09:06,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833827513] [2021-10-28 23:09:06,154 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:09:06,154 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:09:06,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:09:06,156 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:09:06,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-28 23:09:11,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 110 check-sat command(s) [2021-10-28 23:09:11,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:09:11,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 1285 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-28 23:09:11,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:09:17,061 INFO L134 CoverageAnalysis]: Checked inductivity of 89448 backedges. 592 proven. 82366 refuted. 0 times theorem prover too weak. 6490 trivial. 0 not checked. [2021-10-28 23:09:17,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833827513] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:09:17,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:09:17,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 37] total 51 [2021-10-28 23:09:17,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815999752] [2021-10-28 23:09:17,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-28 23:09:17,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:09:17,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-28 23:09:17,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=606, Invalid=1944, Unknown=0, NotChecked=0, Total=2550 [2021-10-28 23:09:17,065 INFO L87 Difference]: Start difference. First operand 958 states and 974 transitions. Second operand has 51 states, 51 states have (on average 6.431372549019608) internal successors, (328), 51 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:09:18,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:09:18,118 INFO L93 Difference]: Finished difference Result 1097 states and 1117 transitions. [2021-10-28 23:09:18,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-10-28 23:09:18,119 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 6.431372549019608) internal successors, (328), 51 states have internal predecessors, (328), 0 states have call successors, (0), 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 821 [2021-10-28 23:09:18,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:09:18,122 INFO L225 Difference]: With dead ends: 1097 [2021-10-28 23:09:18,123 INFO L226 Difference]: Without dead ends: 1027 [2021-10-28 23:09:18,124 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 876 GetRequests, 786 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1917 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2887, Invalid=5485, Unknown=0, NotChecked=0, Total=8372 [2021-10-28 23:09:18,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2021-10-28 23:09:18,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 1026. [2021-10-28 23:09:18,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1026 states, 1025 states have (on average 1.0175609756097561) internal successors, (1043), 1025 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:09:18,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 1043 transitions. [2021-10-28 23:09:18,246 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 1043 transitions. Word has length 821 [2021-10-28 23:09:18,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:09:18,247 INFO L470 AbstractCegarLoop]: Abstraction has 1026 states and 1043 transitions. [2021-10-28 23:09:18,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 6.431372549019608) internal successors, (328), 51 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:09:18,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 1043 transitions. [2021-10-28 23:09:18,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 890 [2021-10-28 23:09:18,253 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:09:18,254 INFO L513 BasicCegarLoop]: trace histogram [260, 260, 260, 13, 13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:09:18,296 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-10-28 23:09:18,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:09:18,454 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:09:18,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:09:18,455 INFO L85 PathProgramCache]: Analyzing trace with hash 777202455, now seen corresponding path program 12 times [2021-10-28 23:09:18,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:09:18,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742247654] [2021-10-28 23:09:18,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:09:18,456 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:09:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:19,055 INFO L134 CoverageAnalysis]: Checked inductivity of 105014 backedges. 24 proven. 97320 refuted. 0 times theorem prover too weak. 7670 trivial. 0 not checked. [2021-10-28 23:09:19,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:09:19,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742247654] [2021-10-28 23:09:19,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742247654] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:09:19,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701248213] [2021-10-28 23:09:19,057 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:09:19,057 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:09:19,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:09:19,058 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:09:19,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-28 23:09:24,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 131 check-sat command(s) [2021-10-28 23:09:24,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:09:24,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 1387 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-28 23:09:24,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:09:31,221 INFO L134 CoverageAnalysis]: Checked inductivity of 105014 backedges. 24 proven. 97320 refuted. 0 times theorem prover too weak. 7670 trivial. 0 not checked. [2021-10-28 23:09:31,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701248213] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:09:31,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:09:31,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-10-28 23:09:31,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739306561] [2021-10-28 23:09:31,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-28 23:09:31,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:09:31,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-28 23:09:31,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=556, Unknown=0, NotChecked=0, Total=930 [2021-10-28 23:09:31,224 INFO L87 Difference]: Start difference. First operand 1026 states and 1043 transitions. Second operand has 31 states, 31 states have (on average 9.35483870967742) internal successors, (290), 30 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:09:31,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:09:31,443 INFO L93 Difference]: Finished difference Result 1164 states and 1185 transitions. [2021-10-28 23:09:31,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 23:09:31,443 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 9.35483870967742) internal successors, (290), 30 states have internal predecessors, (290), 0 states have call successors, (0), 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 889 [2021-10-28 23:09:31,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:09:31,447 INFO L225 Difference]: With dead ends: 1164 [2021-10-28 23:09:31,447 INFO L226 Difference]: Without dead ends: 1094 [2021-10-28 23:09:31,448 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 904 GetRequests, 875 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=374, Invalid=556, Unknown=0, NotChecked=0, Total=930 [2021-10-28 23:09:31,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2021-10-28 23:09:31,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 1094. [2021-10-28 23:09:31,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1093 states have (on average 1.0173833485818846) internal successors, (1112), 1093 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:09:31,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1112 transitions. [2021-10-28 23:09:31,513 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1112 transitions. Word has length 889 [2021-10-28 23:09:31,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:09:31,514 INFO L470 AbstractCegarLoop]: Abstraction has 1094 states and 1112 transitions. [2021-10-28 23:09:31,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 9.35483870967742) internal successors, (290), 30 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:09:31,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1112 transitions. [2021-10-28 23:09:31,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 958 [2021-10-28 23:09:31,525 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:09:31,526 INFO L513 BasicCegarLoop]: trace histogram [280, 280, 280, 14, 14, 14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:09:31,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-10-28 23:09:31,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-10-28 23:09:31,740 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:09:31,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:09:31,741 INFO L85 PathProgramCache]: Analyzing trace with hash -47185573, now seen corresponding path program 13 times [2021-10-28 23:09:31,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:09:31,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917988107] [2021-10-28 23:09:31,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:09:31,741 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:09:31,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:32,375 INFO L134 CoverageAnalysis]: Checked inductivity of 121828 backedges. 26 proven. 113542 refuted. 0 times theorem prover too weak. 8260 trivial. 0 not checked. [2021-10-28 23:09:32,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:09:32,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917988107] [2021-10-28 23:09:32,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917988107] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:09:32,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578628791] [2021-10-28 23:09:32,376 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:09:32,377 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:09:32,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:09:32,378 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:09:32,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-10-28 23:09:38,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:38,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 1489 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 23:09:38,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:09:44,683 INFO L134 CoverageAnalysis]: Checked inductivity of 121828 backedges. 26 proven. 113542 refuted. 0 times theorem prover too weak. 8260 trivial. 0 not checked. [2021-10-28 23:09:44,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578628791] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:09:44,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:09:44,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-10-28 23:09:44,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027799741] [2021-10-28 23:09:44,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-28 23:09:44,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:09:44,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-28 23:09:44,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=633, Unknown=0, NotChecked=0, Total=1056 [2021-10-28 23:09:44,687 INFO L87 Difference]: Start difference. First operand 1094 states and 1112 transitions. Second operand has 33 states, 33 states have (on average 9.454545454545455) internal successors, (312), 32 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:09:44,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:09:44,887 INFO L93 Difference]: Finished difference Result 1232 states and 1254 transitions. [2021-10-28 23:09:44,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 23:09:44,887 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 9.454545454545455) internal successors, (312), 32 states have internal predecessors, (312), 0 states have call successors, (0), 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 957 [2021-10-28 23:09:44,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:09:44,891 INFO L225 Difference]: With dead ends: 1232 [2021-10-28 23:09:44,891 INFO L226 Difference]: Without dead ends: 1162 [2021-10-28 23:09:44,892 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 973 GetRequests, 942 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=423, Invalid=633, Unknown=0, NotChecked=0, Total=1056 [2021-10-28 23:09:44,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2021-10-28 23:09:44,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1162. [2021-10-28 23:09:44,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 1161 states have (on average 1.0172265288544358) internal successors, (1181), 1161 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:09:44,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1181 transitions. [2021-10-28 23:09:44,983 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1181 transitions. Word has length 957 [2021-10-28 23:09:44,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:09:44,984 INFO L470 AbstractCegarLoop]: Abstraction has 1162 states and 1181 transitions. [2021-10-28 23:09:44,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 9.454545454545455) internal successors, (312), 32 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:09:44,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1181 transitions. [2021-10-28 23:09:44,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1026 [2021-10-28 23:09:44,995 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:09:44,996 INFO L513 BasicCegarLoop]: trace histogram [300, 300, 300, 15, 15, 15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:09:45,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-10-28 23:09:45,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-10-28 23:09:45,212 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:09:45,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:09:45,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1705768351, now seen corresponding path program 14 times [2021-10-28 23:09:45,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:09:45,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759116744] [2021-10-28 23:09:45,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:09:45,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:09:45,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:46,016 INFO L134 CoverageAnalysis]: Checked inductivity of 139890 backedges. 28 proven. 131012 refuted. 0 times theorem prover too weak. 8850 trivial. 0 not checked. [2021-10-28 23:09:46,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:09:46,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759116744] [2021-10-28 23:09:46,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759116744] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:09:46,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190482539] [2021-10-28 23:09:46,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:09:46,018 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:09:46,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:09:46,019 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:09:46,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-28 23:09:52,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:09:52,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:09:52,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 1591 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-28 23:09:52,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:09:59,365 INFO L134 CoverageAnalysis]: Checked inductivity of 139890 backedges. 28 proven. 131012 refuted. 0 times theorem prover too weak. 8850 trivial. 0 not checked. [2021-10-28 23:09:59,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190482539] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:09:59,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:09:59,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-10-28 23:09:59,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156052059] [2021-10-28 23:09:59,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-28 23:09:59,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:09:59,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-28 23:09:59,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=475, Invalid=715, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 23:09:59,369 INFO L87 Difference]: Start difference. First operand 1162 states and 1181 transitions. Second operand has 35 states, 35 states have (on average 9.542857142857143) internal successors, (334), 34 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:09:59,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:09:59,605 INFO L93 Difference]: Finished difference Result 1300 states and 1323 transitions. [2021-10-28 23:09:59,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-28 23:09:59,606 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 9.542857142857143) internal successors, (334), 34 states have internal predecessors, (334), 0 states have call successors, (0), 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 1025 [2021-10-28 23:09:59,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:09:59,609 INFO L225 Difference]: With dead ends: 1300 [2021-10-28 23:09:59,609 INFO L226 Difference]: Without dead ends: 1230 [2021-10-28 23:09:59,609 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1042 GetRequests, 1009 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=475, Invalid=715, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 23:09:59,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2021-10-28 23:09:59,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1230. [2021-10-28 23:09:59,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 1.017087062652563) internal successors, (1250), 1229 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:09:59,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 1250 transitions. [2021-10-28 23:09:59,672 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 1250 transitions. Word has length 1025 [2021-10-28 23:09:59,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:09:59,673 INFO L470 AbstractCegarLoop]: Abstraction has 1230 states and 1250 transitions. [2021-10-28 23:09:59,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 9.542857142857143) internal successors, (334), 34 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:09:59,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 1250 transitions. [2021-10-28 23:09:59,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1094 [2021-10-28 23:09:59,682 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:09:59,682 INFO L513 BasicCegarLoop]: trace histogram [320, 320, 320, 16, 16, 16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:09:59,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-10-28 23:09:59,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-10-28 23:09:59,883 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:09:59,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:09:59,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1760032797, now seen corresponding path program 15 times [2021-10-28 23:09:59,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:09:59,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980005536] [2021-10-28 23:09:59,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:09:59,884 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:10:00,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:10:00,685 INFO L134 CoverageAnalysis]: Checked inductivity of 159200 backedges. 30 proven. 149730 refuted. 0 times theorem prover too weak. 9440 trivial. 0 not checked. [2021-10-28 23:10:00,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:10:00,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980005536] [2021-10-28 23:10:00,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980005536] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:10:00,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327239075] [2021-10-28 23:10:00,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:10:00,685 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:10:00,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:10:00,686 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:10:00,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-10-28 23:10:08,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 134 check-sat command(s) [2021-10-28 23:10:08,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:10:08,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 1465 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-28 23:10:08,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:10:16,057 INFO L134 CoverageAnalysis]: Checked inductivity of 159200 backedges. 30 proven. 149730 refuted. 0 times theorem prover too weak. 9440 trivial. 0 not checked. [2021-10-28 23:10:16,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327239075] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:10:16,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:10:16,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-10-28 23:10:16,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772743951] [2021-10-28 23:10:16,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-28 23:10:16,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:10:16,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-28 23:10:16,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=802, Unknown=0, NotChecked=0, Total=1332 [2021-10-28 23:10:16,060 INFO L87 Difference]: Start difference. First operand 1230 states and 1250 transitions. Second operand has 37 states, 37 states have (on average 9.621621621621621) internal successors, (356), 36 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:10:16,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:10:16,306 INFO L93 Difference]: Finished difference Result 1368 states and 1392 transitions. [2021-10-28 23:10:16,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-28 23:10:16,306 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 9.621621621621621) internal successors, (356), 36 states have internal predecessors, (356), 0 states have call successors, (0), 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 1093 [2021-10-28 23:10:16,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:10:16,310 INFO L225 Difference]: With dead ends: 1368 [2021-10-28 23:10:16,310 INFO L226 Difference]: Without dead ends: 1298 [2021-10-28 23:10:16,311 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1111 GetRequests, 1076 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=530, Invalid=802, Unknown=0, NotChecked=0, Total=1332 [2021-10-28 23:10:16,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2021-10-28 23:10:16,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 1298. [2021-10-28 23:10:16,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 1297 states have (on average 1.0169622205088666) internal successors, (1319), 1297 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:10:16,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 1319 transitions. [2021-10-28 23:10:16,378 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 1319 transitions. Word has length 1093 [2021-10-28 23:10:16,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:10:16,379 INFO L470 AbstractCegarLoop]: Abstraction has 1298 states and 1319 transitions. [2021-10-28 23:10:16,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 9.621621621621621) internal successors, (356), 36 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:10:16,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 1319 transitions. [2021-10-28 23:10:16,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1162 [2021-10-28 23:10:16,387 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:10:16,388 INFO L513 BasicCegarLoop]: trace histogram [340, 340, 340, 17, 17, 17, 17, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:10:16,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-10-28 23:10:16,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:10:16,589 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:10:16,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:10:16,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1471858649, now seen corresponding path program 16 times [2021-10-28 23:10:16,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:10:16,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124197738] [2021-10-28 23:10:16,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:10:16,590 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:10:16,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:10:17,398 INFO L134 CoverageAnalysis]: Checked inductivity of 179758 backedges. 32 proven. 169696 refuted. 0 times theorem prover too weak. 10030 trivial. 0 not checked. [2021-10-28 23:10:17,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:10:17,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124197738] [2021-10-28 23:10:17,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124197738] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:10:17,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431987815] [2021-10-28 23:10:17,400 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:10:17,400 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:10:17,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:10:17,401 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:10:17,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-10-28 23:10:25,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:10:25,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:10:25,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 1754 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-28 23:10:25,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:10:33,607 INFO L134 CoverageAnalysis]: Checked inductivity of 179758 backedges. 564 proven. 169754 refuted. 0 times theorem prover too weak. 9440 trivial. 0 not checked. [2021-10-28 23:10:33,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431987815] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:10:33,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:10:33,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 41] total 60 [2021-10-28 23:10:33,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329522022] [2021-10-28 23:10:33,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-10-28 23:10:33,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:10:33,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-10-28 23:10:33,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=842, Invalid=2698, Unknown=0, NotChecked=0, Total=3540 [2021-10-28 23:10:33,611 INFO L87 Difference]: Start difference. First operand 1298 states and 1319 transitions. Second operand has 60 states, 60 states have (on average 7.3) internal successors, (438), 60 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:10:34,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:10:34,287 INFO L93 Difference]: Finished difference Result 1437 states and 1462 transitions. [2021-10-28 23:10:34,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-28 23:10:34,288 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 7.3) internal successors, (438), 60 states have internal predecessors, (438), 0 states have call successors, (0), 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 1161 [2021-10-28 23:10:34,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:10:34,290 INFO L225 Difference]: With dead ends: 1437 [2021-10-28 23:10:34,290 INFO L226 Difference]: Without dead ends: 1367 [2021-10-28 23:10:34,291 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1200 GetRequests, 1122 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1537 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2042, Invalid=4278, Unknown=0, NotChecked=0, Total=6320 [2021-10-28 23:10:34,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1367 states. [2021-10-28 23:10:34,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1367 to 1366. [2021-10-28 23:10:34,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1365 states have (on average 1.0168498168498168) internal successors, (1388), 1365 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:10:34,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 1388 transitions. [2021-10-28 23:10:34,389 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 1388 transitions. Word has length 1161 [2021-10-28 23:10:34,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:10:34,390 INFO L470 AbstractCegarLoop]: Abstraction has 1366 states and 1388 transitions. [2021-10-28 23:10:34,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 7.3) internal successors, (438), 60 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:10:34,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 1388 transitions. [2021-10-28 23:10:34,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1230 [2021-10-28 23:10:34,400 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:10:34,400 INFO L513 BasicCegarLoop]: trace histogram [360, 360, 360, 18, 18, 18, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:10:34,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-10-28 23:10:34,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:10:34,601 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:10:34,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:10:34,602 INFO L85 PathProgramCache]: Analyzing trace with hash -679180693, now seen corresponding path program 17 times [2021-10-28 23:10:34,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:10:34,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356602332] [2021-10-28 23:10:34,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:10:34,602 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:10:34,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:10:35,676 INFO L134 CoverageAnalysis]: Checked inductivity of 201564 backedges. 34 proven. 190910 refuted. 0 times theorem prover too weak. 10620 trivial. 0 not checked. [2021-10-28 23:10:35,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:10:35,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356602332] [2021-10-28 23:10:35,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356602332] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:10:35,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797249974] [2021-10-28 23:10:35,679 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:10:35,679 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:10:35,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:10:35,684 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:10:35,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-10-28 23:10:45,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 156 check-sat command(s) [2021-10-28 23:10:45,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:10:45,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 1897 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-28 23:10:45,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:10:54,176 INFO L134 CoverageAnalysis]: Checked inductivity of 201564 backedges. 604 proven. 190930 refuted. 0 times theorem prover too weak. 10030 trivial. 0 not checked. [2021-10-28 23:10:54,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797249974] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:10:54,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:10:54,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 43] total 63 [2021-10-28 23:10:54,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178247000] [2021-10-28 23:10:54,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-10-28 23:10:54,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:10:54,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-10-28 23:10:54,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=891, Invalid=3015, Unknown=0, NotChecked=0, Total=3906 [2021-10-28 23:10:54,180 INFO L87 Difference]: Start difference. First operand 1366 states and 1388 transitions. Second operand has 63 states, 63 states have (on average 7.301587301587301) internal successors, (460), 63 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:10:55,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:10:55,848 INFO L93 Difference]: Finished difference Result 1505 states and 1531 transitions. [2021-10-28 23:10:55,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-10-28 23:10:55,849 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 7.301587301587301) internal successors, (460), 63 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1229 [2021-10-28 23:10:55,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:10:55,851 INFO L225 Difference]: With dead ends: 1505 [2021-10-28 23:10:55,852 INFO L226 Difference]: Without dead ends: 1435 [2021-10-28 23:10:55,853 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1311 GetRequests, 1188 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4019 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5366, Invalid=10134, Unknown=0, NotChecked=0, Total=15500 [2021-10-28 23:10:55,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2021-10-28 23:10:55,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1434. [2021-10-28 23:10:55,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1434 states, 1433 states have (on average 1.0167480809490579) internal successors, (1457), 1433 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:10:55,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 1457 transitions. [2021-10-28 23:10:55,942 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 1457 transitions. Word has length 1229 [2021-10-28 23:10:55,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:10:55,943 INFO L470 AbstractCegarLoop]: Abstraction has 1434 states and 1457 transitions. [2021-10-28 23:10:55,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 7.301587301587301) internal successors, (460), 63 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:10:55,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 1457 transitions. [2021-10-28 23:10:55,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1298 [2021-10-28 23:10:55,953 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:10:55,954 INFO L513 BasicCegarLoop]: trace histogram [380, 380, 380, 19, 19, 19, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:10:56,008 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-10-28 23:10:56,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:10:56,154 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:10:56,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:10:56,155 INFO L85 PathProgramCache]: Analyzing trace with hash -895028561, now seen corresponding path program 18 times [2021-10-28 23:10:56,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:10:56,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35994410] [2021-10-28 23:10:56,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:10:56,156 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:10:56,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:10:57,534 INFO L134 CoverageAnalysis]: Checked inductivity of 224618 backedges. 36 proven. 213372 refuted. 0 times theorem prover too weak. 11210 trivial. 0 not checked. [2021-10-28 23:10:57,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:10:57,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35994410] [2021-10-28 23:10:57,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35994410] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:10:57,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69860592] [2021-10-28 23:10:57,535 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:10:57,536 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:10:57,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:10:57,537 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:10:57,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-10-28 23:11:08,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 139 check-sat command(s) [2021-10-28 23:11:08,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:11:08,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 1535 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-28 23:11:08,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:11:16,886 INFO L134 CoverageAnalysis]: Checked inductivity of 224618 backedges. 36 proven. 213372 refuted. 0 times theorem prover too weak. 11210 trivial. 0 not checked. [2021-10-28 23:11:16,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69860592] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:11:16,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:11:16,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-10-28 23:11:16,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440702514] [2021-10-28 23:11:16,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-10-28 23:11:16,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:11:16,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-10-28 23:11:16,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=713, Invalid=1093, Unknown=0, NotChecked=0, Total=1806 [2021-10-28 23:11:16,890 INFO L87 Difference]: Start difference. First operand 1434 states and 1457 transitions. Second operand has 43 states, 43 states have (on average 9.813953488372093) internal successors, (422), 42 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:11:17,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:11:17,176 INFO L93 Difference]: Finished difference Result 1572 states and 1599 transitions. [2021-10-28 23:11:17,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-28 23:11:17,177 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 9.813953488372093) internal successors, (422), 42 states have internal predecessors, (422), 0 states have call successors, (0), 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 1297 [2021-10-28 23:11:17,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:11:17,180 INFO L225 Difference]: With dead ends: 1572 [2021-10-28 23:11:17,180 INFO L226 Difference]: Without dead ends: 1502 [2021-10-28 23:11:17,180 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1318 GetRequests, 1277 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=713, Invalid=1093, Unknown=0, NotChecked=0, Total=1806 [2021-10-28 23:11:17,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-10-28 23:11:17,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1502. [2021-10-28 23:11:17,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1502 states, 1501 states have (on average 1.016655562958028) internal successors, (1526), 1501 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:11:17,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1502 states to 1502 states and 1526 transitions. [2021-10-28 23:11:17,257 INFO L78 Accepts]: Start accepts. Automaton has 1502 states and 1526 transitions. Word has length 1297 [2021-10-28 23:11:17,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:11:17,258 INFO L470 AbstractCegarLoop]: Abstraction has 1502 states and 1526 transitions. [2021-10-28 23:11:17,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 9.813953488372093) internal successors, (422), 42 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:11:17,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1502 states and 1526 transitions. [2021-10-28 23:11:17,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1366 [2021-10-28 23:11:17,270 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:11:17,270 INFO L513 BasicCegarLoop]: trace histogram [400, 400, 400, 20, 20, 20, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:11:17,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-10-28 23:11:17,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:11:17,471 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:11:17,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:11:17,472 INFO L85 PathProgramCache]: Analyzing trace with hash -822248205, now seen corresponding path program 19 times [2021-10-28 23:11:17,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:11:17,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19739285] [2021-10-28 23:11:17,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:11:17,472 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:11:18,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:11:18,155 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:11:19,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:11:19,959 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:11:19,963 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 23:11:19,964 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 23:11:19,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-10-28 23:11:19,972 INFO L731 BasicCegarLoop]: Path program histogram: [19, 7, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:11:19,979 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 23:11:20,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 11:11:20 BoogieIcfgContainer [2021-10-28 23:11:20,617 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 23:11:20,618 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 23:11:20,618 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 23:11:20,619 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 23:11:20,619 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:06:34" (3/4) ... [2021-10-28 23:11:20,622 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-28 23:11:21,235 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 23:11:21,236 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 23:11:21,238 INFO L168 Benchmark]: Toolchain (without parser) took 287862.29 ms. Allocated memory was 104.9 MB in the beginning and 1.9 GB in the end (delta: 1.8 GB). Free memory was 62.7 MB in the beginning and 1.3 GB in the end (delta: -1.2 GB). Peak memory consumption was 768.8 MB. Max. memory is 16.1 GB. [2021-10-28 23:11:21,239 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 104.9 MB. Free memory was 78.8 MB in the beginning and 78.8 MB in the end (delta: 55.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:11:21,240 INFO L168 Benchmark]: CACSL2BoogieTranslator took 394.62 ms. Allocated memory is still 104.9 MB. Free memory was 62.5 MB in the beginning and 79.2 MB in the end (delta: -16.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:11:21,240 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.77 ms. Allocated memory is still 104.9 MB. Free memory was 79.2 MB in the beginning and 77.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:11:21,241 INFO L168 Benchmark]: Boogie Preprocessor took 43.86 ms. Allocated memory is still 104.9 MB. Free memory was 77.8 MB in the beginning and 76.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:11:21,241 INFO L168 Benchmark]: RCFGBuilder took 413.39 ms. Allocated memory is still 104.9 MB. Free memory was 76.5 MB in the beginning and 66.3 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 23:11:21,242 INFO L168 Benchmark]: TraceAbstraction took 286328.66 ms. Allocated memory was 104.9 MB in the beginning and 1.9 GB in the end (delta: 1.8 GB). Free memory was 65.9 MB in the beginning and 1.1 GB in the end (delta: -1.0 GB). Peak memory consumption was 1.9 GB. Max. memory is 16.1 GB. [2021-10-28 23:11:21,242 INFO L168 Benchmark]: Witness Printer took 617.59 ms. Allocated memory is still 1.9 GB. Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -205.4 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2021-10-28 23:11:21,245 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 104.9 MB. Free memory was 78.8 MB in the beginning and 78.8 MB in the end (delta: 55.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 394.62 ms. Allocated memory is still 104.9 MB. Free memory was 62.5 MB in the beginning and 79.2 MB in the end (delta: -16.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 55.77 ms. Allocated memory is still 104.9 MB. Free memory was 79.2 MB in the beginning and 77.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 43.86 ms. Allocated memory is still 104.9 MB. Free memory was 77.8 MB in the beginning and 76.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 413.39 ms. Allocated memory is still 104.9 MB. Free memory was 76.5 MB in the beginning and 66.3 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 286328.66 ms. Allocated memory was 104.9 MB in the beginning and 1.9 GB in the end (delta: 1.8 GB). Free memory was 65.9 MB in the beginning and 1.1 GB in the end (delta: -1.0 GB). Peak memory consumption was 1.9 GB. Max. memory is 16.1 GB. * Witness Printer took 617.59 ms. Allocated memory is still 1.9 GB. Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -205.4 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L9] int last ; [L18] int SIZE = 20; VAL [last=0, SIZE=20] [L20] last = __VERIFIER_nondet_int() [L6] COND FALSE !(!cond) VAL [last=22, SIZE=20] [L22] int a=0,b=0,c=0,st=0,d=0; VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND TRUE d == SIZE [L38] a = 0 [L39] b = 1 VAL [last=22, SIZE=20] [L11] COND TRUE !(cond) VAL [last=22, SIZE=20] [L12] reach_error() VAL [last=22, SIZE=20] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 285.6s, OverallIterations: 55, TraceHistogramMax: 400, PathProgramHistogramMax: 19, EmptinessCheckTime: 0.2s, AutomataDifference: 39.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 756 SDtfs, 11102 SDslu, 3334 SDs, 0 SdLazy, 15137 SolverSat, 1694 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16863 GetRequests, 14566 SyntacticMatches, 2 SemanticMatches, 2295 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60073 ImplicationChecksByTransitivity, 40.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1714occurred in iteration=34, InterpolantAutomatonStates: 1514, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.9s AutomataMinimizationTime, 54 MinimizatonAttempts, 6839 StatesRemovedByMinimization, 42 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.1s SsaConstructionTime, 11.0s SatisfiabilityAnalysisTime, 124.1s InterpolantComputationTime, 31971 NumberOfCodeBlocks, 30611 NumberOfCodeBlocksAsserted, 1089 NumberOfCheckSat, 30506 ConstructedInterpolants, 0 QuantifiedInterpolants, 178480 SizeOfPredicates, 133 NumberOfNonLiveVariables, 23583 ConjunctsInSsa, 800 ConjunctsInUnsatCore, 100 InterpolantComputations, 12 PerfectInterpolantSequences, 253176/3128819 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-28 23:11:21,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1eb3196-cb17-4b8e-a13c-8111c749f218/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...