./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/systemc/pc_sfifo_1.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f77952-51f7-4a3c-a85a-089befd286ab/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f77952-51f7-4a3c-a85a-089befd286ab/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_52f77952-51f7-4a3c-a85a-089befd286ab/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f77952-51f7-4a3c-a85a-089befd286ab/bin/uautomizer-GMMbpWq8iD/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/systemc/pc_sfifo_1.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f77952-51f7-4a3c-a85a-089befd286ab/bin/uautomizer-GMMbpWq8iD/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f77952-51f7-4a3c-a85a-089befd286ab/bin/uautomizer-GMMbpWq8iD --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e4250f34aeb1bbaa6a68e9df4c6caead053a128de9d45e1f0dae379c6394c54d ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 23:15:50,578 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 23:15:50,581 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 23:15:50,646 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 23:15:50,647 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 23:15:50,652 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 23:15:50,655 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 23:15:50,660 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 23:15:50,664 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 23:15:50,674 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 23:15:50,675 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 23:15:50,678 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 23:15:50,679 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 23:15:50,683 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 23:15:50,688 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 23:15:50,697 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 23:15:50,701 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 23:15:50,703 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 23:15:50,706 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 23:15:50,715 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 23:15:50,719 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 23:15:50,721 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 23:15:50,726 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 23:15:50,728 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 23:15:50,737 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 23:15:50,743 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 23:15:50,744 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 23:15:50,746 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 23:15:50,748 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 23:15:50,750 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 23:15:50,752 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 23:15:50,753 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 23:15:50,756 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 23:15:50,758 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 23:15:50,760 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 23:15:50,760 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 23:15:50,761 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 23:15:50,761 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 23:15:50,762 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 23:15:50,763 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 23:15:50,764 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 23:15:50,766 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f77952-51f7-4a3c-a85a-089befd286ab/bin/uautomizer-GMMbpWq8iD/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-10-28 23:15:50,835 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 23:15:50,835 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 23:15:50,836 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 23:15:50,836 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 23:15:50,838 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 23:15:50,838 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 23:15:50,838 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 23:15:50,839 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-10-28 23:15:50,839 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-10-28 23:15:50,839 INFO L138 SettingsManager]: * Use old map elimination=false [2021-10-28 23:15:50,840 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-10-28 23:15:50,840 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-10-28 23:15:50,840 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-10-28 23:15:50,840 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 23:15:50,841 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 23:15:50,841 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 23:15:50,841 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 23:15:50,842 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 23:15:50,842 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 23:15:50,842 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-10-28 23:15:50,842 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-10-28 23:15:50,843 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-10-28 23:15:50,843 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 23:15:50,843 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 23:15:50,843 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-10-28 23:15:50,844 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 23:15:50,844 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-10-28 23:15:50,844 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 23:15:50,845 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 23:15:50,845 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 23:15:50,845 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 23:15:50,846 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 23:15:50,847 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-10-28 23:15:50,847 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR 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_52f77952-51f7-4a3c-a85a-089befd286ab/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f77952-51f7-4a3c-a85a-089befd286ab/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4250f34aeb1bbaa6a68e9df4c6caead053a128de9d45e1f0dae379c6394c54d [2021-10-28 23:15:51,167 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 23:15:51,197 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 23:15:51,201 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 23:15:51,203 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 23:15:51,204 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 23:15:51,206 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f77952-51f7-4a3c-a85a-089befd286ab/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/systemc/pc_sfifo_1.cil-2.c [2021-10-28 23:15:51,316 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f77952-51f7-4a3c-a85a-089befd286ab/bin/uautomizer-GMMbpWq8iD/data/cd292bb5e/f8dcbc0a3ba0478bb8dcdbd88b883f95/FLAGe5ec39de1 [2021-10-28 23:15:51,910 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 23:15:51,911 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f77952-51f7-4a3c-a85a-089befd286ab/sv-benchmarks/c/systemc/pc_sfifo_1.cil-2.c [2021-10-28 23:15:51,926 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f77952-51f7-4a3c-a85a-089befd286ab/bin/uautomizer-GMMbpWq8iD/data/cd292bb5e/f8dcbc0a3ba0478bb8dcdbd88b883f95/FLAGe5ec39de1 [2021-10-28 23:15:52,246 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f77952-51f7-4a3c-a85a-089befd286ab/bin/uautomizer-GMMbpWq8iD/data/cd292bb5e/f8dcbc0a3ba0478bb8dcdbd88b883f95 [2021-10-28 23:15:52,249 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 23:15:52,251 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 23:15:52,258 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 23:15:52,259 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 23:15:52,267 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 23:15:52,268 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:15:52" (1/1) ... [2021-10-28 23:15:52,270 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53912cc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:15:52, skipping insertion in model container [2021-10-28 23:15:52,273 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:15:52" (1/1) ... [2021-10-28 23:15:52,283 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 23:15:52,323 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 23:15:52,495 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_52f77952-51f7-4a3c-a85a-089befd286ab/sv-benchmarks/c/systemc/pc_sfifo_1.cil-2.c[337,350] [2021-10-28 23:15:52,571 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:15:52,596 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 23:15:52,611 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_52f77952-51f7-4a3c-a85a-089befd286ab/sv-benchmarks/c/systemc/pc_sfifo_1.cil-2.c[337,350] [2021-10-28 23:15:52,637 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:15:52,656 INFO L208 MainTranslator]: Completed translation [2021-10-28 23:15:52,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:15:52 WrapperNode [2021-10-28 23:15:52,657 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 23:15:52,658 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 23:15:52,659 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 23:15:52,659 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 23:15:52,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:15:52" (1/1) ... [2021-10-28 23:15:52,679 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:15:52" (1/1) ... [2021-10-28 23:15:52,714 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 23:15:52,715 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 23:15:52,715 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 23:15:52,715 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 23:15:52,727 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:15:52" (1/1) ... [2021-10-28 23:15:52,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:15:52" (1/1) ... [2021-10-28 23:15:52,743 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:15:52" (1/1) ... [2021-10-28 23:15:52,743 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:15:52" (1/1) ... [2021-10-28 23:15:52,750 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:15:52" (1/1) ... [2021-10-28 23:15:52,773 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:15:52" (1/1) ... [2021-10-28 23:15:52,775 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:15:52" (1/1) ... [2021-10-28 23:15:52,779 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 23:15:52,780 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 23:15:52,780 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 23:15:52,780 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 23:15:52,789 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:15:52" (1/1) ... [2021-10-28 23:15:52,798 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:15:52,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f77952-51f7-4a3c-a85a-089befd286ab/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:15:52,836 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f77952-51f7-4a3c-a85a-089befd286ab/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:15:52,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f77952-51f7-4a3c-a85a-089befd286ab/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-10-28 23:15:52,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 23:15:52,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 23:15:52,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 23:15:52,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 23:15:53,313 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 23:15:53,328 INFO L299 CfgBuilder]: Removed 42 assume(true) statements. [2021-10-28 23:15:53,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:15:53 BoogieIcfgContainer [2021-10-28 23:15:53,331 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 23:15:53,333 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-10-28 23:15:53,333 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-10-28 23:15:53,337 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-10-28 23:15:53,353 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-28 23:15:53,353 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.10 11:15:52" (1/3) ... [2021-10-28 23:15:53,355 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@6f32795d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.10 11:15:53, skipping insertion in model container [2021-10-28 23:15:53,356 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-28 23:15:53,356 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:15:52" (2/3) ... [2021-10-28 23:15:53,357 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@6f32795d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.10 11:15:53, skipping insertion in model container [2021-10-28 23:15:53,357 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-28 23:15:53,357 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:15:53" (3/3) ... [2021-10-28 23:15:53,359 INFO L389 chiAutomizerObserver]: Analyzing ICFG pc_sfifo_1.cil-2.c [2021-10-28 23:15:53,452 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-10-28 23:15:53,452 INFO L360 BuchiCegarLoop]: Hoare is false [2021-10-28 23:15:53,453 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-10-28 23:15:53,453 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-28 23:15:53,453 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-28 23:15:53,453 INFO L364 BuchiCegarLoop]: Difference is false [2021-10-28 23:15:53,453 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-28 23:15:53,454 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-10-28 23:15:53,477 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 74 states, 73 states have (on average 1.5616438356164384) internal successors, (114), 73 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:53,506 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 65 [2021-10-28 23:15:53,506 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:15:53,506 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:15:53,516 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2021-10-28 23:15:53,516 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:15:53,516 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-10-28 23:15:53,517 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 74 states, 73 states have (on average 1.5616438356164384) internal successors, (114), 73 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:53,524 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 65 [2021-10-28 23:15:53,525 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:15:53,525 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:15:53,526 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2021-10-28 23:15:53,526 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:15:53,536 INFO L791 eck$LassoCheckResult]: Stem: 57#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(19);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12);~q_buf_0~0 := 0;~q_free~0 := 0;~q_read_ev~0 := 0;~q_write_ev~0 := 0;~p_num_write~0 := 0;~p_last_write~0 := 0;~p_dw_st~0 := 0;~p_dw_pc~0 := 0;~p_dw_i~0 := 0;~c_num_read~0 := 0;~c_last_read~0 := 0;~c_dr_st~0 := 0;~c_dr_pc~0 := 0;~c_dr_i~0 := 0;~a_t~0 := 0; 41#L-1true havoc main_#res;havoc main_~__retres1~3;havoc main_~__retres1~3;~q_free~0 := 1;~q_write_ev~0 := 2;~q_read_ev~0 := ~q_write_ev~0;~p_num_write~0 := 0;~p_dw_pc~0 := 0;~p_dw_i~0 := 1;~c_num_read~0 := 0;~c_dr_pc~0 := 0;~c_dr_i~0 := 1; 48#L348true havoc start_simulation_#t~ret14, start_simulation_~kernel_st~0, start_simulation_~tmp~3;havoc start_simulation_~kernel_st~0;havoc start_simulation_~tmp~3;start_simulation_~kernel_st~0 := 0; 8#L198true assume !(1 == ~p_dw_i~0);~p_dw_st~0 := 2; 14#L198-2true assume !(1 == ~c_dr_i~0);~c_dr_st~0 := 2; 55#L315-1true [2021-10-28 23:15:53,537 INFO L793 eck$LassoCheckResult]: Loop: 55#L315-1true assume !false; 50#L316true start_simulation_~kernel_st~0 := 1;havoc eval_#t~ret10, eval_#t~nondet11, eval_#t~nondet12, eval_~tmp~1, eval_~tmp___0~1, eval_~tmp___1~0;havoc eval_~tmp~1;havoc eval_~tmp___0~1;havoc eval_~tmp___1~0; 70#L264true assume false; 30#L280true havoc stop_simulation_#res;havoc stop_simulation_#t~ret13, stop_simulation_~tmp~2, stop_simulation_~__retres2~0;havoc stop_simulation_~tmp~2;havoc stop_simulation_~__retres2~0;havoc exists_runnable_thread_#res;havoc exists_runnable_thread_~__retres1~2;havoc exists_runnable_thread_~__retres1~2; 68#L216-1true assume 0 == ~p_dw_st~0;exists_runnable_thread_~__retres1~2 := 1; 63#L228-1true exists_runnable_thread_#res := exists_runnable_thread_~__retres1~2; 69#L229-1true stop_simulation_#t~ret13 := exists_runnable_thread_#res;stop_simulation_~tmp~2 := stop_simulation_#t~ret13;havoc stop_simulation_#t~ret13; 47#L294true assume 0 != stop_simulation_~tmp~2;stop_simulation_~__retres2~0 := 0; 26#L301true stop_simulation_#res := stop_simulation_~__retres2~0; 16#L302true start_simulation_#t~ret14 := stop_simulation_#res;start_simulation_~tmp~3 := start_simulation_#t~ret14;havoc start_simulation_#t~ret14; 22#L322true assume !(0 != start_simulation_~tmp~3); 55#L315-1true [2021-10-28 23:15:53,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:53,545 INFO L85 PathProgramCache]: Analyzing trace with hash 28692871, now seen corresponding path program 1 times [2021-10-28 23:15:53,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:53,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879483181] [2021-10-28 23:15:53,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:53,559 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:53,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:15:53,766 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 23:15:53,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:53,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879483181] [2021-10-28 23:15:53,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879483181] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:15:53,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:15:53,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:15:53,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850706912] [2021-10-28 23:15:53,776 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 23:15:53,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:53,778 INFO L85 PathProgramCache]: Analyzing trace with hash -168076210, now seen corresponding path program 1 times [2021-10-28 23:15:53,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:53,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659590344] [2021-10-28 23:15:53,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:53,779 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:53,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:15:53,796 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 23:15:53,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:53,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659590344] [2021-10-28 23:15:53,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659590344] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:15:53,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:15:53,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-28 23:15:53,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739947321] [2021-10-28 23:15:53,800 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-28 23:15:53,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:15:53,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 23:15:53,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 23:15:53,823 INFO L87 Difference]: Start difference. First operand has 74 states, 73 states have (on average 1.5616438356164384) internal successors, (114), 73 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 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 23:15:53,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:15:53,852 INFO L93 Difference]: Finished difference Result 74 states and 103 transitions. [2021-10-28 23:15:53,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 23:15:53,855 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 74 states and 103 transitions. [2021-10-28 23:15:53,860 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 63 [2021-10-28 23:15:53,873 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 74 states to 68 states and 97 transitions. [2021-10-28 23:15:53,875 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 68 [2021-10-28 23:15:53,876 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2021-10-28 23:15:53,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 97 transitions. [2021-10-28 23:15:53,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:15:53,878 INFO L681 BuchiCegarLoop]: Abstraction has 68 states and 97 transitions. [2021-10-28 23:15:53,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states and 97 transitions. [2021-10-28 23:15:53,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-10-28 23:15:53,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 68 states have (on average 1.4264705882352942) internal successors, (97), 67 states have internal predecessors, (97), 0 states have call successors, (0), 0 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 23:15:53,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 97 transitions. [2021-10-28 23:15:53,932 INFO L704 BuchiCegarLoop]: Abstraction has 68 states and 97 transitions. [2021-10-28 23:15:53,932 INFO L587 BuchiCegarLoop]: Abstraction has 68 states and 97 transitions. [2021-10-28 23:15:53,932 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-10-28 23:15:53,933 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 68 states and 97 transitions. [2021-10-28 23:15:53,935 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 63 [2021-10-28 23:15:53,935 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:15:53,935 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:15:53,936 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2021-10-28 23:15:53,936 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:15:53,937 INFO L791 eck$LassoCheckResult]: Stem: 221#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(19);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12);~q_buf_0~0 := 0;~q_free~0 := 0;~q_read_ev~0 := 0;~q_write_ev~0 := 0;~p_num_write~0 := 0;~p_last_write~0 := 0;~p_dw_st~0 := 0;~p_dw_pc~0 := 0;~p_dw_i~0 := 0;~c_num_read~0 := 0;~c_last_read~0 := 0;~c_dr_st~0 := 0;~c_dr_pc~0 := 0;~c_dr_i~0 := 0;~a_t~0 := 0; 212#L-1 havoc main_#res;havoc main_~__retres1~3;havoc main_~__retres1~3;~q_free~0 := 1;~q_write_ev~0 := 2;~q_read_ev~0 := ~q_write_ev~0;~p_num_write~0 := 0;~p_dw_pc~0 := 0;~p_dw_i~0 := 1;~c_num_read~0 := 0;~c_dr_pc~0 := 0;~c_dr_i~0 := 1; 213#L348 havoc start_simulation_#t~ret14, start_simulation_~kernel_st~0, start_simulation_~tmp~3;havoc start_simulation_~kernel_st~0;havoc start_simulation_~tmp~3;start_simulation_~kernel_st~0 := 0; 167#L198 assume 1 == ~p_dw_i~0;~p_dw_st~0 := 0; 168#L198-2 assume !(1 == ~c_dr_i~0);~c_dr_st~0 := 2; 180#L315-1 [2021-10-28 23:15:53,937 INFO L793 eck$LassoCheckResult]: Loop: 180#L315-1 assume !false; 219#L316 start_simulation_~kernel_st~0 := 1;havoc eval_#t~ret10, eval_#t~nondet11, eval_#t~nondet12, eval_~tmp~1, eval_~tmp___0~1, eval_~tmp___1~0;havoc eval_~tmp~1;havoc eval_~tmp___0~1;havoc eval_~tmp___1~0; 169#L264 assume !false; 202#L240 havoc exists_runnable_thread_#res;havoc exists_runnable_thread_~__retres1~2;havoc exists_runnable_thread_~__retres1~2; 203#L216 assume 0 == ~p_dw_st~0;exists_runnable_thread_~__retres1~2 := 1; 192#L228 exists_runnable_thread_#res := exists_runnable_thread_~__retres1~2; 193#L229 eval_#t~ret10 := exists_runnable_thread_#res;eval_~tmp___1~0 := eval_#t~ret10;havoc eval_#t~ret10; 175#L244 assume !(0 != eval_~tmp___1~0); 177#L280 havoc stop_simulation_#res;havoc stop_simulation_#t~ret13, stop_simulation_~tmp~2, stop_simulation_~__retres2~0;havoc stop_simulation_~tmp~2;havoc stop_simulation_~__retres2~0;havoc exists_runnable_thread_#res;havoc exists_runnable_thread_~__retres1~2;havoc exists_runnable_thread_~__retres1~2; 204#L216-1 assume 0 == ~p_dw_st~0;exists_runnable_thread_~__retres1~2 := 1; 217#L228-1 exists_runnable_thread_#res := exists_runnable_thread_~__retres1~2; 224#L229-1 stop_simulation_#t~ret13 := exists_runnable_thread_#res;stop_simulation_~tmp~2 := stop_simulation_#t~ret13;havoc stop_simulation_#t~ret13; 218#L294 assume 0 != stop_simulation_~tmp~2;stop_simulation_~__retres2~0 := 0; 200#L301 stop_simulation_#res := stop_simulation_~__retres2~0; 183#L302 start_simulation_#t~ret14 := stop_simulation_#res;start_simulation_~tmp~3 := start_simulation_#t~ret14;havoc start_simulation_#t~ret14; 184#L322 assume !(0 != start_simulation_~tmp~3); 180#L315-1 [2021-10-28 23:15:53,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:53,938 INFO L85 PathProgramCache]: Analyzing trace with hash 28692809, now seen corresponding path program 1 times [2021-10-28 23:15:53,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:53,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932692392] [2021-10-28 23:15:53,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:53,940 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:53,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:15:53,996 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 23:15:53,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:53,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932692392] [2021-10-28 23:15:53,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932692392] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:15:53,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:15:53,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-28 23:15:53,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115515446] [2021-10-28 23:15:53,999 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 23:15:53,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:54,000 INFO L85 PathProgramCache]: Analyzing trace with hash -241927711, now seen corresponding path program 1 times [2021-10-28 23:15:54,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:54,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643542286] [2021-10-28 23:15:54,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:54,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:54,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:15:54,067 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 23:15:54,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:54,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643542286] [2021-10-28 23:15:54,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643542286] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:15:54,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:15:54,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 23:15:54,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470673501] [2021-10-28 23:15:54,069 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-28 23:15:54,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:15:54,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 23:15:54,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 23:15:54,071 INFO L87 Difference]: Start difference. First operand 68 states and 97 transitions. cyclomatic complexity: 30 Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 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 23:15:54,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:15:54,095 INFO L93 Difference]: Finished difference Result 68 states and 96 transitions. [2021-10-28 23:15:54,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 23:15:54,101 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 68 states and 96 transitions. [2021-10-28 23:15:54,107 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 63 [2021-10-28 23:15:54,109 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 68 states to 68 states and 96 transitions. [2021-10-28 23:15:54,109 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 68 [2021-10-28 23:15:54,110 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2021-10-28 23:15:54,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 96 transitions. [2021-10-28 23:15:54,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:15:54,111 INFO L681 BuchiCegarLoop]: Abstraction has 68 states and 96 transitions. [2021-10-28 23:15:54,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states and 96 transitions. [2021-10-28 23:15:54,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-10-28 23:15:54,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 68 states have (on average 1.411764705882353) internal successors, (96), 67 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:54,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 96 transitions. [2021-10-28 23:15:54,124 INFO L704 BuchiCegarLoop]: Abstraction has 68 states and 96 transitions. [2021-10-28 23:15:54,124 INFO L587 BuchiCegarLoop]: Abstraction has 68 states and 96 transitions. [2021-10-28 23:15:54,124 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-10-28 23:15:54,124 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 68 states and 96 transitions. [2021-10-28 23:15:54,131 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 63 [2021-10-28 23:15:54,131 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:15:54,131 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:15:54,132 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2021-10-28 23:15:54,133 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:15:54,133 INFO L791 eck$LassoCheckResult]: Stem: 366#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(19);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12);~q_buf_0~0 := 0;~q_free~0 := 0;~q_read_ev~0 := 0;~q_write_ev~0 := 0;~p_num_write~0 := 0;~p_last_write~0 := 0;~p_dw_st~0 := 0;~p_dw_pc~0 := 0;~p_dw_i~0 := 0;~c_num_read~0 := 0;~c_last_read~0 := 0;~c_dr_st~0 := 0;~c_dr_pc~0 := 0;~c_dr_i~0 := 0;~a_t~0 := 0; 357#L-1 havoc main_#res;havoc main_~__retres1~3;havoc main_~__retres1~3;~q_free~0 := 1;~q_write_ev~0 := 2;~q_read_ev~0 := ~q_write_ev~0;~p_num_write~0 := 0;~p_dw_pc~0 := 0;~p_dw_i~0 := 1;~c_num_read~0 := 0;~c_dr_pc~0 := 0;~c_dr_i~0 := 1; 358#L348 havoc start_simulation_#t~ret14, start_simulation_~kernel_st~0, start_simulation_~tmp~3;havoc start_simulation_~kernel_st~0;havoc start_simulation_~tmp~3;start_simulation_~kernel_st~0 := 0; 312#L198 assume 1 == ~p_dw_i~0;~p_dw_st~0 := 0; 313#L198-2 assume 1 == ~c_dr_i~0;~c_dr_st~0 := 0; 325#L315-1 [2021-10-28 23:15:54,133 INFO L793 eck$LassoCheckResult]: Loop: 325#L315-1 assume !false; 364#L316 start_simulation_~kernel_st~0 := 1;havoc eval_#t~ret10, eval_#t~nondet11, eval_#t~nondet12, eval_~tmp~1, eval_~tmp___0~1, eval_~tmp___1~0;havoc eval_~tmp~1;havoc eval_~tmp___0~1;havoc eval_~tmp___1~0; 314#L264 assume !false; 347#L240 havoc exists_runnable_thread_#res;havoc exists_runnable_thread_~__retres1~2;havoc exists_runnable_thread_~__retres1~2; 348#L216 assume 0 == ~p_dw_st~0;exists_runnable_thread_~__retres1~2 := 1; 337#L228 exists_runnable_thread_#res := exists_runnable_thread_~__retres1~2; 338#L229 eval_#t~ret10 := exists_runnable_thread_#res;eval_~tmp___1~0 := eval_#t~ret10;havoc eval_#t~ret10; 322#L244 assume !(0 != eval_~tmp___1~0); 324#L280 havoc stop_simulation_#res;havoc stop_simulation_#t~ret13, stop_simulation_~tmp~2, stop_simulation_~__retres2~0;havoc stop_simulation_~tmp~2;havoc stop_simulation_~__retres2~0;havoc exists_runnable_thread_#res;havoc exists_runnable_thread_~__retres1~2;havoc exists_runnable_thread_~__retres1~2; 349#L216-1 assume 0 == ~p_dw_st~0;exists_runnable_thread_~__retres1~2 := 1; 361#L228-1 exists_runnable_thread_#res := exists_runnable_thread_~__retres1~2; 369#L229-1 stop_simulation_#t~ret13 := exists_runnable_thread_#res;stop_simulation_~tmp~2 := stop_simulation_#t~ret13;havoc stop_simulation_#t~ret13; 363#L294 assume 0 != stop_simulation_~tmp~2;stop_simulation_~__retres2~0 := 0; 342#L301 stop_simulation_#res := stop_simulation_~__retres2~0; 328#L302 start_simulation_#t~ret14 := stop_simulation_#res;start_simulation_~tmp~3 := start_simulation_#t~ret14;havoc start_simulation_#t~ret14; 329#L322 assume !(0 != start_simulation_~tmp~3); 325#L315-1 [2021-10-28 23:15:54,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:54,136 INFO L85 PathProgramCache]: Analyzing trace with hash 28692807, now seen corresponding path program 1 times [2021-10-28 23:15:54,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:54,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017588] [2021-10-28 23:15:54,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:54,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:15:54,178 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:15:54,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:15:54,305 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:15:54,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:54,311 INFO L85 PathProgramCache]: Analyzing trace with hash -241927711, now seen corresponding path program 2 times [2021-10-28 23:15:54,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:54,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269724240] [2021-10-28 23:15:54,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:54,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:54,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:15:54,379 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 23:15:54,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:54,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269724240] [2021-10-28 23:15:54,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269724240] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:15:54,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:15:54,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 23:15:54,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534735739] [2021-10-28 23:15:54,382 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-28 23:15:54,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:15:54,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:15:54,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:15:54,384 INFO L87 Difference]: Start difference. First operand 68 states and 96 transitions. cyclomatic complexity: 29 Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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 23:15:54,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:15:54,546 INFO L93 Difference]: Finished difference Result 134 states and 187 transitions. [2021-10-28 23:15:54,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:15:54,547 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 134 states and 187 transitions. [2021-10-28 23:15:54,550 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 129 [2021-10-28 23:15:54,555 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 134 states to 134 states and 187 transitions. [2021-10-28 23:15:54,561 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 134 [2021-10-28 23:15:54,561 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 134 [2021-10-28 23:15:54,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 134 states and 187 transitions. [2021-10-28 23:15:54,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:15:54,565 INFO L681 BuchiCegarLoop]: Abstraction has 134 states and 187 transitions. [2021-10-28 23:15:54,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states and 187 transitions. [2021-10-28 23:15:54,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 71. [2021-10-28 23:15:54,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 71 states have (on average 1.3943661971830985) internal successors, (99), 70 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 23:15:54,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 99 transitions. [2021-10-28 23:15:54,585 INFO L704 BuchiCegarLoop]: Abstraction has 71 states and 99 transitions. [2021-10-28 23:15:54,585 INFO L587 BuchiCegarLoop]: Abstraction has 71 states and 99 transitions. [2021-10-28 23:15:54,586 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-10-28 23:15:54,586 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 71 states and 99 transitions. [2021-10-28 23:15:54,587 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 66 [2021-10-28 23:15:54,588 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:15:54,588 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:15:54,589 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2021-10-28 23:15:54,590 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:15:54,590 INFO L791 eck$LassoCheckResult]: Stem: 584#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(19);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12);~q_buf_0~0 := 0;~q_free~0 := 0;~q_read_ev~0 := 0;~q_write_ev~0 := 0;~p_num_write~0 := 0;~p_last_write~0 := 0;~p_dw_st~0 := 0;~p_dw_pc~0 := 0;~p_dw_i~0 := 0;~c_num_read~0 := 0;~c_last_read~0 := 0;~c_dr_st~0 := 0;~c_dr_pc~0 := 0;~c_dr_i~0 := 0;~a_t~0 := 0; 575#L-1 havoc main_#res;havoc main_~__retres1~3;havoc main_~__retres1~3;~q_free~0 := 1;~q_write_ev~0 := 2;~q_read_ev~0 := ~q_write_ev~0;~p_num_write~0 := 0;~p_dw_pc~0 := 0;~p_dw_i~0 := 1;~c_num_read~0 := 0;~c_dr_pc~0 := 0;~c_dr_i~0 := 1; 576#L348 havoc start_simulation_#t~ret14, start_simulation_~kernel_st~0, start_simulation_~tmp~3;havoc start_simulation_~kernel_st~0;havoc start_simulation_~tmp~3;start_simulation_~kernel_st~0 := 0; 530#L198 assume 1 == ~p_dw_i~0;~p_dw_st~0 := 0; 531#L198-2 assume 1 == ~c_dr_i~0;~c_dr_st~0 := 0; 542#L315-1 [2021-10-28 23:15:54,591 INFO L793 eck$LassoCheckResult]: Loop: 542#L315-1 assume !false; 582#L316 start_simulation_~kernel_st~0 := 1;havoc eval_#t~ret10, eval_#t~nondet11, eval_#t~nondet12, eval_~tmp~1, eval_~tmp___0~1, eval_~tmp___1~0;havoc eval_~tmp~1;havoc eval_~tmp___0~1;havoc eval_~tmp___1~0; 532#L264 assume !false; 564#L240 havoc exists_runnable_thread_#res;havoc exists_runnable_thread_~__retres1~2;havoc exists_runnable_thread_~__retres1~2; 565#L216 assume !(0 == ~p_dw_st~0); 574#L220 assume !(0 == ~c_dr_st~0);exists_runnable_thread_~__retres1~2 := 0; 588#L228 exists_runnable_thread_#res := exists_runnable_thread_~__retres1~2; 590#L229 eval_#t~ret10 := exists_runnable_thread_#res;eval_~tmp___1~0 := eval_#t~ret10;havoc eval_#t~ret10; 589#L244 assume !(0 != eval_~tmp___1~0); 566#L280 havoc stop_simulation_#res;havoc stop_simulation_#t~ret13, stop_simulation_~tmp~2, stop_simulation_~__retres2~0;havoc stop_simulation_~tmp~2;havoc stop_simulation_~__retres2~0;havoc exists_runnable_thread_#res;havoc exists_runnable_thread_~__retres1~2;havoc exists_runnable_thread_~__retres1~2; 567#L216-1 assume 0 == ~p_dw_st~0;exists_runnable_thread_~__retres1~2 := 1; 580#L228-1 exists_runnable_thread_#res := exists_runnable_thread_~__retres1~2; 587#L229-1 stop_simulation_#t~ret13 := exists_runnable_thread_#res;stop_simulation_~tmp~2 := stop_simulation_#t~ret13;havoc stop_simulation_#t~ret13; 581#L294 assume 0 != stop_simulation_~tmp~2;stop_simulation_~__retres2~0 := 0; 559#L301 stop_simulation_#res := stop_simulation_~__retres2~0; 545#L302 start_simulation_#t~ret14 := stop_simulation_#res;start_simulation_~tmp~3 := start_simulation_#t~ret14;havoc start_simulation_#t~ret14; 546#L322 assume !(0 != start_simulation_~tmp~3); 542#L315-1 [2021-10-28 23:15:54,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:54,593 INFO L85 PathProgramCache]: Analyzing trace with hash 28692807, now seen corresponding path program 2 times [2021-10-28 23:15:54,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:54,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2501035] [2021-10-28 23:15:54,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:54,595 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:54,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:15:54,633 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:15:54,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:15:54,675 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:15:54,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:54,685 INFO L85 PathProgramCache]: Analyzing trace with hash 616414076, now seen corresponding path program 1 times [2021-10-28 23:15:54,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:54,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489858578] [2021-10-28 23:15:54,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:54,686 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:54,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:15:54,731 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 23:15:54,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:54,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489858578] [2021-10-28 23:15:54,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489858578] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:15:54,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:15:54,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:15:54,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171501809] [2021-10-28 23:15:54,738 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-28 23:15:54,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:15:54,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 23:15:54,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 23:15:54,744 INFO L87 Difference]: Start difference. First operand 71 states and 99 transitions. cyclomatic complexity: 29 Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 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 23:15:54,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:15:54,800 INFO L93 Difference]: Finished difference Result 121 states and 166 transitions. [2021-10-28 23:15:54,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 23:15:54,801 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 121 states and 166 transitions. [2021-10-28 23:15:54,803 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 114 [2021-10-28 23:15:54,807 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 121 states to 121 states and 166 transitions. [2021-10-28 23:15:54,810 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 121 [2021-10-28 23:15:54,811 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 121 [2021-10-28 23:15:54,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 121 states and 166 transitions. [2021-10-28 23:15:54,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:15:54,820 INFO L681 BuchiCegarLoop]: Abstraction has 121 states and 166 transitions. [2021-10-28 23:15:54,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states and 166 transitions. [2021-10-28 23:15:54,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 104. [2021-10-28 23:15:54,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 104 states have (on average 1.3653846153846154) internal successors, (142), 103 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:54,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 142 transitions. [2021-10-28 23:15:54,839 INFO L704 BuchiCegarLoop]: Abstraction has 104 states and 142 transitions. [2021-10-28 23:15:54,839 INFO L587 BuchiCegarLoop]: Abstraction has 104 states and 142 transitions. [2021-10-28 23:15:54,839 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-10-28 23:15:54,841 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 104 states and 142 transitions. [2021-10-28 23:15:54,842 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 97 [2021-10-28 23:15:54,843 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:15:54,843 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:15:54,844 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:15:54,845 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:15:54,845 INFO L791 eck$LassoCheckResult]: Stem: 786#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(19);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12);~q_buf_0~0 := 0;~q_free~0 := 0;~q_read_ev~0 := 0;~q_write_ev~0 := 0;~p_num_write~0 := 0;~p_last_write~0 := 0;~p_dw_st~0 := 0;~p_dw_pc~0 := 0;~p_dw_i~0 := 0;~c_num_read~0 := 0;~c_last_read~0 := 0;~c_dr_st~0 := 0;~c_dr_pc~0 := 0;~c_dr_i~0 := 0;~a_t~0 := 0; 776#L-1 havoc main_#res;havoc main_~__retres1~3;havoc main_~__retres1~3;~q_free~0 := 1;~q_write_ev~0 := 2;~q_read_ev~0 := ~q_write_ev~0;~p_num_write~0 := 0;~p_dw_pc~0 := 0;~p_dw_i~0 := 1;~c_num_read~0 := 0;~c_dr_pc~0 := 0;~c_dr_i~0 := 1; 777#L348 havoc start_simulation_#t~ret14, start_simulation_~kernel_st~0, start_simulation_~tmp~3;havoc start_simulation_~kernel_st~0;havoc start_simulation_~tmp~3;start_simulation_~kernel_st~0 := 0; 728#L198 assume 1 == ~p_dw_i~0;~p_dw_st~0 := 0; 729#L198-2 assume 1 == ~c_dr_i~0;~c_dr_st~0 := 0; 742#L315-1 assume !false; 783#L316 start_simulation_~kernel_st~0 := 1;havoc eval_#t~ret10, eval_#t~nondet11, eval_#t~nondet12, eval_~tmp~1, eval_~tmp___0~1, eval_~tmp___1~0;havoc eval_~tmp~1;havoc eval_~tmp___0~1;havoc eval_~tmp___1~0; 731#L264 [2021-10-28 23:15:54,845 INFO L793 eck$LassoCheckResult]: Loop: 731#L264 assume !false; 792#L240 havoc exists_runnable_thread_#res;havoc exists_runnable_thread_~__retres1~2;havoc exists_runnable_thread_~__retres1~2; 800#L216 assume 0 == ~p_dw_st~0;exists_runnable_thread_~__retres1~2 := 1; 797#L228 exists_runnable_thread_#res := exists_runnable_thread_~__retres1~2; 796#L229 eval_#t~ret10 := exists_runnable_thread_#res;eval_~tmp___1~0 := eval_#t~ret10;havoc eval_#t~ret10; 795#L244 assume 0 != eval_~tmp___1~0; 794#L244-1 assume 0 == ~p_dw_st~0;eval_~tmp~1 := eval_#t~nondet11;havoc eval_#t~nondet11; 752#L253 assume !(0 != eval_~tmp~1); 730#L249 assume !(0 == ~c_dr_st~0); 731#L264 [2021-10-28 23:15:54,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:54,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1803984585, now seen corresponding path program 1 times [2021-10-28 23:15:54,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:54,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992237732] [2021-10-28 23:15:54,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:54,848 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:54,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:15:54,880 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:15:54,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:15:54,924 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:15:54,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:54,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1028489344, now seen corresponding path program 1 times [2021-10-28 23:15:54,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:54,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850552763] [2021-10-28 23:15:54,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:54,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:54,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:15:54,948 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:15:54,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:15:54,956 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:15:54,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:54,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1783037256, now seen corresponding path program 1 times [2021-10-28 23:15:54,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:54,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925417559] [2021-10-28 23:15:54,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:54,964 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:54,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:15:55,021 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 23:15:55,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:55,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925417559] [2021-10-28 23:15:55,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925417559] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:15:55,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:15:55,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-28 23:15:55,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977660436] [2021-10-28 23:15:55,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:15:55,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 23:15:55,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 23:15:55,166 INFO L87 Difference]: Start difference. First operand 104 states and 142 transitions. cyclomatic complexity: 39 Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 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 23:15:55,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:15:55,216 INFO L93 Difference]: Finished difference Result 184 states and 249 transitions. [2021-10-28 23:15:55,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 23:15:55,216 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 184 states and 249 transitions. [2021-10-28 23:15:55,220 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 177 [2021-10-28 23:15:55,223 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 184 states to 184 states and 249 transitions. [2021-10-28 23:15:55,223 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 184 [2021-10-28 23:15:55,224 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 184 [2021-10-28 23:15:55,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 184 states and 249 transitions. [2021-10-28 23:15:55,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:15:55,230 INFO L681 BuchiCegarLoop]: Abstraction has 184 states and 249 transitions. [2021-10-28 23:15:55,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states and 249 transitions. [2021-10-28 23:15:55,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 146. [2021-10-28 23:15:55,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 146 states have (on average 1.3493150684931507) internal successors, (197), 145 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 23:15:55,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 197 transitions. [2021-10-28 23:15:55,258 INFO L704 BuchiCegarLoop]: Abstraction has 146 states and 197 transitions. [2021-10-28 23:15:55,258 INFO L587 BuchiCegarLoop]: Abstraction has 146 states and 197 transitions. [2021-10-28 23:15:55,259 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-10-28 23:15:55,259 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 146 states and 197 transitions. [2021-10-28 23:15:55,260 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 139 [2021-10-28 23:15:55,261 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:15:55,261 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:15:55,262 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:15:55,262 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:15:55,262 INFO L791 eck$LassoCheckResult]: Stem: 1088#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(19);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12);~q_buf_0~0 := 0;~q_free~0 := 0;~q_read_ev~0 := 0;~q_write_ev~0 := 0;~p_num_write~0 := 0;~p_last_write~0 := 0;~p_dw_st~0 := 0;~p_dw_pc~0 := 0;~p_dw_i~0 := 0;~c_num_read~0 := 0;~c_last_read~0 := 0;~c_dr_st~0 := 0;~c_dr_pc~0 := 0;~c_dr_i~0 := 0;~a_t~0 := 0; 1075#L-1 havoc main_#res;havoc main_~__retres1~3;havoc main_~__retres1~3;~q_free~0 := 1;~q_write_ev~0 := 2;~q_read_ev~0 := ~q_write_ev~0;~p_num_write~0 := 0;~p_dw_pc~0 := 0;~p_dw_i~0 := 1;~c_num_read~0 := 0;~c_dr_pc~0 := 0;~c_dr_i~0 := 1; 1076#L348 havoc start_simulation_#t~ret14, start_simulation_~kernel_st~0, start_simulation_~tmp~3;havoc start_simulation_~kernel_st~0;havoc start_simulation_~tmp~3;start_simulation_~kernel_st~0 := 0; 1024#L198 assume 1 == ~p_dw_i~0;~p_dw_st~0 := 0; 1025#L198-2 assume 1 == ~c_dr_i~0;~c_dr_st~0 := 0; 1038#L315-1 assume !false; 1141#L316 start_simulation_~kernel_st~0 := 1;havoc eval_#t~ret10, eval_#t~nondet11, eval_#t~nondet12, eval_~tmp~1, eval_~tmp___0~1, eval_~tmp___1~0;havoc eval_~tmp~1;havoc eval_~tmp___0~1;havoc eval_~tmp___1~0; 1139#L264 [2021-10-28 23:15:55,263 INFO L793 eck$LassoCheckResult]: Loop: 1139#L264 assume !false; 1138#L240 havoc exists_runnable_thread_#res;havoc exists_runnable_thread_~__retres1~2;havoc exists_runnable_thread_~__retres1~2; 1137#L216 assume 0 == ~p_dw_st~0;exists_runnable_thread_~__retres1~2 := 1; 1135#L228 exists_runnable_thread_#res := exists_runnable_thread_~__retres1~2; 1134#L229 eval_#t~ret10 := exists_runnable_thread_#res;eval_~tmp___1~0 := eval_#t~ret10;havoc eval_#t~ret10; 1110#L244 assume 0 != eval_~tmp___1~0; 1111#L244-1 assume 0 == ~p_dw_st~0;eval_~tmp~1 := eval_#t~nondet11;havoc eval_#t~nondet11; 1114#L253 assume !(0 != eval_~tmp~1); 1116#L249 assume 0 == ~c_dr_st~0;eval_~tmp___0~1 := eval_#t~nondet12;havoc eval_#t~nondet12; 1140#L268 assume !(0 != eval_~tmp___0~1); 1139#L264 [2021-10-28 23:15:55,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:55,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1803984585, now seen corresponding path program 2 times [2021-10-28 23:15:55,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:55,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060723878] [2021-10-28 23:15:55,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:55,266 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:55,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:15:55,288 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:15:55,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:15:55,304 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:15:55,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:55,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1818395562, now seen corresponding path program 1 times [2021-10-28 23:15:55,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:55,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867625060] [2021-10-28 23:15:55,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:55,306 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:55,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:15:55,311 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:15:55,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:15:55,318 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:15:55,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:55,319 INFO L85 PathProgramCache]: Analyzing trace with hash 560416882, now seen corresponding path program 1 times [2021-10-28 23:15:55,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:55,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141899037] [2021-10-28 23:15:55,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:55,320 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:55,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:15:55,331 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:15:55,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:15:55,349 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:15:56,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.10 11:15:56 BoogieIcfgContainer [2021-10-28 23:15:56,477 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-10-28 23:15:56,478 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 23:15:56,478 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 23:15:56,478 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 23:15:56,479 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:15:53" (3/4) ... [2021-10-28 23:15:56,482 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2021-10-28 23:15:56,539 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f77952-51f7-4a3c-a85a-089befd286ab/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 23:15:56,540 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 23:15:56,542 INFO L168 Benchmark]: Toolchain (without parser) took 4289.47 ms. Allocated memory was 113.2 MB in the beginning and 136.3 MB in the end (delta: 23.1 MB). Free memory was 70.3 MB in the beginning and 87.5 MB in the end (delta: -17.2 MB). Peak memory consumption was 3.5 MB. Max. memory is 16.1 GB. [2021-10-28 23:15:56,549 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 113.2 MB. Free memory is still 87.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:15:56,549 INFO L168 Benchmark]: CACSL2BoogieTranslator took 399.30 ms. Allocated memory is still 113.2 MB. Free memory was 70.1 MB in the beginning and 86.2 MB in the end (delta: -16.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:15:56,550 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.58 ms. Allocated memory is still 113.2 MB. Free memory was 86.2 MB in the beginning and 84.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:15:56,551 INFO L168 Benchmark]: Boogie Preprocessor took 64.00 ms. Allocated memory is still 113.2 MB. Free memory was 84.1 MB in the beginning and 82.8 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:15:56,551 INFO L168 Benchmark]: RCFGBuilder took 552.04 ms. Allocated memory is still 113.2 MB. Free memory was 82.7 MB in the beginning and 68.3 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-28 23:15:56,552 INFO L168 Benchmark]: BuchiAutomizer took 3144.20 ms. Allocated memory was 113.2 MB in the beginning and 136.3 MB in the end (delta: 23.1 MB). Free memory was 68.0 MB in the beginning and 89.6 MB in the end (delta: -21.6 MB). Peak memory consumption was 50.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:15:56,553 INFO L168 Benchmark]: Witness Printer took 62.34 ms. Allocated memory is still 136.3 MB. Free memory was 89.6 MB in the beginning and 87.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:15:56,560 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 113.2 MB. Free memory is still 87.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 399.30 ms. Allocated memory is still 113.2 MB. Free memory was 70.1 MB in the beginning and 86.2 MB in the end (delta: -16.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 55.58 ms. Allocated memory is still 113.2 MB. Free memory was 86.2 MB in the beginning and 84.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 64.00 ms. Allocated memory is still 113.2 MB. Free memory was 84.1 MB in the beginning and 82.8 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 552.04 ms. Allocated memory is still 113.2 MB. Free memory was 82.7 MB in the beginning and 68.3 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 3144.20 ms. Allocated memory was 113.2 MB in the beginning and 136.3 MB in the end (delta: 23.1 MB). Free memory was 68.0 MB in the beginning and 89.6 MB in the end (delta: -21.6 MB). Peak memory consumption was 50.4 MB. Max. memory is 16.1 GB. * Witness Printer took 62.34 ms. Allocated memory is still 136.3 MB. Free memory was 89.6 MB in the beginning and 87.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 5 terminating modules (5 trivial, 0 deterministic, 0 nondeterministic) and one nonterminating remainder module.5 modules have a trivial ranking function, the largest among these consists of 5 locations. The remainder module has 146 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 3.0s and 6 iterations. TraceHistogramMax:1. Analysis of lassos took 2.3s. Construction of modules took 0.1s. Büchi inclusion checks took 0.2s. Highest rank in rank-based complementation 0. Minimization of det autom 5. Minimization of nondet autom 0. Automata minimization 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 118 StatesRemovedByMinimization, 3 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 146 states and ocurred in iteration 5. Nontrivial modules had stage [0, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 537 SDtfs, 571 SDslu, 420 SDs, 0 SdLazy, 55 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time LassoAnalysisResults: nont1 unkn0 SFLI2 SFLT0 conc1 concLT0 SILN0 SILU0 SILI2 SILT0 lasso0 LassoPreprocessingBenchmarks: LassoTerminationAnalysisBenchmarks: not availableLassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 0 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.0s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 239]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {NULL=1} State at position 1 is {p_last_write=0, c_dr_i=1, c_dr_pc=0, NULL=3, a_t=0, NULL=0, \result=0, NULL=1, c_num_read=0, tmp=0, c_dr_st=0, kernel_st=1, q_read_ev=2, p_dw_i=1, tmp___0=0, tmp___1=1, q_write_ev=2, __retres1=1, NULL=5, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@5bddd741=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@2e05b72=0, p_dw_pc=0, NULL=0, NULL=0, NULL=0, tmp=0, q_free=1, NULL=4, p_dw_st=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@77946e0b=0, c_last_read=0, NULL=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@2c23e9b3=0, p_num_write=0, q_buf_0=0, __retres1=0, \result=1} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 239]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L16] int q_buf_0 ; [L17] int q_free ; [L18] int q_read_ev ; [L19] int q_write_ev ; [L20] int p_num_write ; [L21] int p_last_write ; [L22] int p_dw_st ; [L23] int p_dw_pc ; [L24] int p_dw_i ; [L25] int c_num_read ; [L26] int c_last_read ; [L27] int c_dr_st ; [L28] int c_dr_pc ; [L29] int c_dr_i ; [L136] static int a_t ; [L352] int __retres1 ; [L338] q_free = 1 [L339] q_write_ev = 2 [L340] q_read_ev = q_write_ev [L341] p_num_write = 0 [L342] p_dw_pc = 0 [L343] p_dw_i = 1 [L344] c_num_read = 0 [L345] c_dr_pc = 0 [L346] c_dr_i = 1 [L306] int kernel_st ; [L307] int tmp ; [L311] kernel_st = 0 [L198] COND TRUE (int )p_dw_i == 1 [L199] p_dw_st = 0 [L203] COND TRUE (int )c_dr_i == 1 [L204] c_dr_st = 0 [L315] COND TRUE 1 [L318] kernel_st = 1 [L233] int tmp ; [L234] int tmp___0 ; [L235] int tmp___1 ; Loop: [L239] COND TRUE 1 [L213] int __retres1 ; [L216] COND TRUE (int )p_dw_st == 0 [L217] __retres1 = 1 [L229] return (__retres1); [L242] tmp___1 = exists_runnable_thread() [L244] COND TRUE \read(tmp___1) [L249] COND TRUE (int )p_dw_st == 0 [L251] tmp = __VERIFIER_nondet_int() [L253] COND FALSE !(\read(tmp)) [L264] COND TRUE (int )c_dr_st == 0 [L266] tmp___0 = __VERIFIER_nondet_int() [L268] COND FALSE !(\read(tmp___0)) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2021-10-28 23:15:56,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f77952-51f7-4a3c-a85a-089befd286ab/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...