./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-memory-alloca/Urban-2013WST-Fig2-alloca.i --full-output --architecture 64bit -------------------------------------------------------------------------------- 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_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/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_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-memory-alloca/Urban-2013WST-Fig2-alloca.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/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 64bit --witnessprinter.graph.data.programhash 7e4d89645739beae47f9c52ff5003bd634bd856a7fdd28a03c9ca1afb29cead1 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 23:51:31,729 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 23:51:31,731 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 23:51:31,770 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 23:51:31,770 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 23:51:31,772 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 23:51:31,774 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 23:51:31,777 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 23:51:31,780 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 23:51:31,781 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 23:51:31,782 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 23:51:31,784 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 23:51:31,785 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 23:51:31,787 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 23:51:31,789 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 23:51:31,791 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 23:51:31,792 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 23:51:31,794 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 23:51:31,797 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 23:51:31,800 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 23:51:31,802 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 23:51:31,804 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 23:51:31,805 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 23:51:31,807 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 23:51:31,811 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 23:51:31,812 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 23:51:31,813 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 23:51:31,814 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 23:51:31,815 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 23:51:31,816 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 23:51:31,817 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 23:51:31,818 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 23:51:31,819 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 23:51:31,820 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 23:51:31,822 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 23:51:31,822 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 23:51:31,823 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 23:51:31,824 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 23:51:31,824 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 23:51:31,825 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 23:51:31,826 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 23:51:31,827 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-10-28 23:51:31,855 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 23:51:31,856 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 23:51:31,856 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 23:51:31,856 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 23:51:31,858 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 23:51:31,858 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 23:51:31,858 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 23:51:31,859 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-10-28 23:51:31,859 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-10-28 23:51:31,859 INFO L138 SettingsManager]: * Use old map elimination=false [2021-10-28 23:51:31,859 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-10-28 23:51:31,860 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-10-28 23:51:31,860 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-10-28 23:51:31,860 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 23:51:31,860 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 23:51:31,861 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 23:51:31,861 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 23:51:31,861 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-10-28 23:51:31,861 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-10-28 23:51:31,862 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-10-28 23:51:31,862 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 23:51:31,862 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-10-28 23:51:31,862 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 23:51:31,863 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-10-28 23:51:31,863 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 23:51:31,863 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 23:51:31,863 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 23:51:31,864 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 23:51:31,864 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 23:51:31,865 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-10-28 23:51:31,865 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_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e4d89645739beae47f9c52ff5003bd634bd856a7fdd28a03c9ca1afb29cead1 [2021-10-28 23:51:32,121 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 23:51:32,159 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 23:51:32,162 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 23:51:32,165 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 23:51:32,166 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 23:51:32,167 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/termination-memory-alloca/Urban-2013WST-Fig2-alloca.i [2021-10-28 23:51:32,269 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/data/fc57d756c/92eaff0ecb084d7fbab22675aff1e6fa/FLAG501fc7673 [2021-10-28 23:51:32,950 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 23:51:32,951 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/sv-benchmarks/c/termination-memory-alloca/Urban-2013WST-Fig2-alloca.i [2021-10-28 23:51:32,965 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/data/fc57d756c/92eaff0ecb084d7fbab22675aff1e6fa/FLAG501fc7673 [2021-10-28 23:51:33,234 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/data/fc57d756c/92eaff0ecb084d7fbab22675aff1e6fa [2021-10-28 23:51:33,237 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 23:51:33,239 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 23:51:33,248 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 23:51:33,248 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 23:51:33,252 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 23:51:33,253 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:51:33" (1/1) ... [2021-10-28 23:51:33,254 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42c0d696 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:51:33, skipping insertion in model container [2021-10-28 23:51:33,254 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:51:33" (1/1) ... [2021-10-28 23:51:33,262 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 23:51:33,306 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 23:51:33,676 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:51:33,686 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 23:51:33,720 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:51:33,749 INFO L208 MainTranslator]: Completed translation [2021-10-28 23:51:33,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:51:33 WrapperNode [2021-10-28 23:51:33,749 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 23:51:33,751 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 23:51:33,751 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 23:51:33,751 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 23:51:33,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:51:33" (1/1) ... [2021-10-28 23:51:33,771 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:51:33" (1/1) ... [2021-10-28 23:51:33,791 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 23:51:33,792 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 23:51:33,792 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 23:51:33,792 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 23:51:33,801 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:51:33" (1/1) ... [2021-10-28 23:51:33,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:51:33" (1/1) ... [2021-10-28 23:51:33,805 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:51:33" (1/1) ... [2021-10-28 23:51:33,805 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:51:33" (1/1) ... [2021-10-28 23:51:33,809 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:51:33" (1/1) ... [2021-10-28 23:51:33,814 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:51:33" (1/1) ... [2021-10-28 23:51:33,815 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:51:33" (1/1) ... [2021-10-28 23:51:33,817 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 23:51:33,818 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 23:51:33,819 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 23:51:33,819 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 23:51:33,820 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:51:33" (1/1) ... [2021-10-28 23:51:33,828 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:51:33,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:51:33,853 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:51:33,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-10-28 23:51:33,915 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 23:51:33,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 23:51:33,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 23:51:33,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 23:51:33,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 23:51:33,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 23:51:34,208 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 23:51:34,209 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-28 23:51:34,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:51:34 BoogieIcfgContainer [2021-10-28 23:51:34,211 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 23:51:34,212 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-10-28 23:51:34,212 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-10-28 23:51:34,216 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-10-28 23:51:34,217 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-28 23:51:34,217 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.10 11:51:33" (1/3) ... [2021-10-28 23:51:34,219 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@132b1a95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.10 11:51:34, skipping insertion in model container [2021-10-28 23:51:34,219 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-28 23:51:34,219 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:51:33" (2/3) ... [2021-10-28 23:51:34,220 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@132b1a95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.10 11:51:34, skipping insertion in model container [2021-10-28 23:51:34,220 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-28 23:51:34,220 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:51:34" (3/3) ... [2021-10-28 23:51:34,221 INFO L389 chiAutomizerObserver]: Analyzing ICFG Urban-2013WST-Fig2-alloca.i [2021-10-28 23:51:34,317 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-10-28 23:51:34,318 INFO L360 BuchiCegarLoop]: Hoare is false [2021-10-28 23:51:34,318 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-10-28 23:51:34,318 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-28 23:51:34,318 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-28 23:51:34,319 INFO L364 BuchiCegarLoop]: Difference is false [2021-10-28 23:51:34,319 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-28 23:51:34,319 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-10-28 23:51:34,334 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 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 23:51:34,353 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-28 23:51:34,353 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:51:34,353 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:51:34,360 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-28 23:51:34,360 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-28 23:51:34,360 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-10-28 23:51:34,361 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 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 23:51:34,362 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-28 23:51:34,362 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:51:34,363 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:51:34,363 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-28 23:51:34,363 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-28 23:51:34,370 INFO L791 eck$LassoCheckResult]: Stem: 5#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 11#L-1true havoc main_#res;havoc main_#t~malloc2.base, main_#t~malloc2.offset, main_#t~malloc3.base, main_#t~malloc3.offset, main_#t~mem6, main_#t~mem5, main_#t~mem7, main_#t~mem4, main_~x1~0.base, main_~x1~0.offset, main_~x2~0.base, main_~x2~0.offset;call main_#t~malloc2.base, main_#t~malloc2.offset := #Ultimate.allocOnStack(4);main_~x1~0.base, main_~x1~0.offset := main_#t~malloc2.base, main_#t~malloc2.offset;call main_#t~malloc3.base, main_#t~malloc3.offset := #Ultimate.allocOnStack(4);main_~x2~0.base, main_~x2~0.offset := main_#t~malloc3.base, main_#t~malloc3.offset; 7#L549-3true [2021-10-28 23:51:34,371 INFO L793 eck$LassoCheckResult]: Loop: 7#L549-3true call main_#t~mem4 := read~int(main_~x1~0.base, main_~x1~0.offset, 4); 3#L549-1true assume !!(main_#t~mem4 <= 10);havoc main_#t~mem4;call write~int(10, main_~x2~0.base, main_~x2~0.offset, 4); 8#L551-3true assume !true; 12#L551-4true call main_#t~mem7 := read~int(main_~x1~0.base, main_~x1~0.offset, 4);call write~int(1 + main_#t~mem7, main_~x1~0.base, main_~x1~0.offset, 4);havoc main_#t~mem7; 7#L549-3true [2021-10-28 23:51:34,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:51:34,378 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2021-10-28 23:51:34,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:51:34,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31673677] [2021-10-28 23:51:34,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:51:34,390 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:51:34,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:51:34,493 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:51:34,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:51:34,527 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:51:34,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:51:34,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1144360, now seen corresponding path program 1 times [2021-10-28 23:51:34,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:51:34,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312501664] [2021-10-28 23:51:34,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:51:34,532 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:51:34,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:51:34,587 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 23:51:34,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:51:34,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312501664] [2021-10-28 23:51:34,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312501664] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:51:34,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:51:34,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-28 23:51:34,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734015553] [2021-10-28 23:51:34,595 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-28 23:51:34,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:51:34,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-28 23:51:34,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 23:51:34,614 INFO L87 Difference]: Start difference. First operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 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 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 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 23:51:34,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:51:34,621 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2021-10-28 23:51:34,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-28 23:51:34,623 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 12 transitions. [2021-10-28 23:51:34,624 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-28 23:51:34,626 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 7 states and 8 transitions. [2021-10-28 23:51:34,627 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2021-10-28 23:51:34,628 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2021-10-28 23:51:34,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 8 transitions. [2021-10-28 23:51:34,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:51:34,629 INFO L681 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2021-10-28 23:51:34,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 8 transitions. [2021-10-28 23:51:34,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-10-28 23:51:34,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 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 23:51:34,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2021-10-28 23:51:34,671 INFO L704 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2021-10-28 23:51:34,671 INFO L587 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2021-10-28 23:51:34,671 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-10-28 23:51:34,671 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 8 transitions. [2021-10-28 23:51:34,672 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-28 23:51:34,672 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:51:34,672 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:51:34,673 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-28 23:51:34,673 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2021-10-28 23:51:34,673 INFO L791 eck$LassoCheckResult]: Stem: 32#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 33#L-1 havoc main_#res;havoc main_#t~malloc2.base, main_#t~malloc2.offset, main_#t~malloc3.base, main_#t~malloc3.offset, main_#t~mem6, main_#t~mem5, main_#t~mem7, main_#t~mem4, main_~x1~0.base, main_~x1~0.offset, main_~x2~0.base, main_~x2~0.offset;call main_#t~malloc2.base, main_#t~malloc2.offset := #Ultimate.allocOnStack(4);main_~x1~0.base, main_~x1~0.offset := main_#t~malloc2.base, main_#t~malloc2.offset;call main_#t~malloc3.base, main_#t~malloc3.offset := #Ultimate.allocOnStack(4);main_~x2~0.base, main_~x2~0.offset := main_#t~malloc3.base, main_#t~malloc3.offset; 34#L549-3 [2021-10-28 23:51:34,674 INFO L793 eck$LassoCheckResult]: Loop: 34#L549-3 call main_#t~mem4 := read~int(main_~x1~0.base, main_~x1~0.offset, 4); 30#L549-1 assume !!(main_#t~mem4 <= 10);havoc main_#t~mem4;call write~int(10, main_~x2~0.base, main_~x2~0.offset, 4); 31#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 35#L551-1 assume !(main_#t~mem5 > 1);havoc main_#t~mem5; 36#L551-4 call main_#t~mem7 := read~int(main_~x1~0.base, main_~x1~0.offset, 4);call write~int(1 + main_#t~mem7, main_~x1~0.base, main_~x1~0.offset, 4);havoc main_#t~mem7; 34#L549-3 [2021-10-28 23:51:34,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:51:34,675 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 2 times [2021-10-28 23:51:34,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:51:34,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115274505] [2021-10-28 23:51:34,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:51:34,676 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:51:34,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:51:34,691 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:51:34,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:51:34,717 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:51:34,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:51:34,719 INFO L85 PathProgramCache]: Analyzing trace with hash 35468273, now seen corresponding path program 1 times [2021-10-28 23:51:34,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:51:34,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342787034] [2021-10-28 23:51:34,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:51:34,720 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:51:34,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:51:34,783 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 23:51:34,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:51:34,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342787034] [2021-10-28 23:51:34,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342787034] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:51:34,784 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:51:34,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:51:34,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179867981] [2021-10-28 23:51:34,785 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-28 23:51:34,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:51:34,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:51:34,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:51:34,787 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. cyclomatic complexity: 2 Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 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 23:51:34,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:51:34,820 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2021-10-28 23:51:34,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:51:34,821 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 9 states and 10 transitions. [2021-10-28 23:51:34,822 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-10-28 23:51:34,822 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 9 states to 9 states and 10 transitions. [2021-10-28 23:51:34,822 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2021-10-28 23:51:34,823 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2021-10-28 23:51:34,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 10 transitions. [2021-10-28 23:51:34,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:51:34,823 INFO L681 BuchiCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-10-28 23:51:34,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 10 transitions. [2021-10-28 23:51:34,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-28 23:51:34,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 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 23:51:34,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-10-28 23:51:34,825 INFO L704 BuchiCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-10-28 23:51:34,825 INFO L587 BuchiCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-10-28 23:51:34,826 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-10-28 23:51:34,826 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 9 states and 10 transitions. [2021-10-28 23:51:34,826 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-10-28 23:51:34,826 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:51:34,827 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:51:34,827 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-28 23:51:34,827 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1] [2021-10-28 23:51:34,827 INFO L791 eck$LassoCheckResult]: Stem: 57#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 58#L-1 havoc main_#res;havoc main_#t~malloc2.base, main_#t~malloc2.offset, main_#t~malloc3.base, main_#t~malloc3.offset, main_#t~mem6, main_#t~mem5, main_#t~mem7, main_#t~mem4, main_~x1~0.base, main_~x1~0.offset, main_~x2~0.base, main_~x2~0.offset;call main_#t~malloc2.base, main_#t~malloc2.offset := #Ultimate.allocOnStack(4);main_~x1~0.base, main_~x1~0.offset := main_#t~malloc2.base, main_#t~malloc2.offset;call main_#t~malloc3.base, main_#t~malloc3.offset := #Ultimate.allocOnStack(4);main_~x2~0.base, main_~x2~0.offset := main_#t~malloc3.base, main_#t~malloc3.offset; 59#L549-3 [2021-10-28 23:51:34,828 INFO L793 eck$LassoCheckResult]: Loop: 59#L549-3 call main_#t~mem4 := read~int(main_~x1~0.base, main_~x1~0.offset, 4); 55#L549-1 assume !!(main_#t~mem4 <= 10);havoc main_#t~mem4;call write~int(10, main_~x2~0.base, main_~x2~0.offset, 4); 56#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 60#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 61#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 63#L551-1 assume !(main_#t~mem5 > 1);havoc main_#t~mem5; 62#L551-4 call main_#t~mem7 := read~int(main_~x1~0.base, main_~x1~0.offset, 4);call write~int(1 + main_#t~mem7, main_~x1~0.base, main_~x1~0.offset, 4);havoc main_#t~mem7; 59#L549-3 [2021-10-28 23:51:34,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:51:34,829 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 3 times [2021-10-28 23:51:34,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:51:34,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43019544] [2021-10-28 23:51:34,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:51:34,830 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:51:34,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:51:34,858 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:51:34,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:51:34,870 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:51:34,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:51:34,871 INFO L85 PathProgramCache]: Analyzing trace with hash -274676436, now seen corresponding path program 1 times [2021-10-28 23:51:34,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:51:34,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512915063] [2021-10-28 23:51:34,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:51:34,872 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:51:34,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:51:35,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:51:35,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:51:35,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512915063] [2021-10-28 23:51:35,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512915063] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:51:35,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420734910] [2021-10-28 23:51:35,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:51:35,021 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:51:35,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:51:35,025 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:51:35,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 23:51:35,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:51:35,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 23:51:35,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:51:35,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 23:51:35,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 23:51:35,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-28 23:51:35,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:51:35,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420734910] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:51:35,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:51:35,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-10-28 23:51:35,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956911230] [2021-10-28 23:51:35,258 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-28 23:51:35,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:51:35,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:51:35,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:51:35,272 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. cyclomatic complexity: 2 Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 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 23:51:35,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:51:35,334 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2021-10-28 23:51:35,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 23:51:35,335 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 12 transitions. [2021-10-28 23:51:35,338 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2021-10-28 23:51:35,338 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 11 states and 12 transitions. [2021-10-28 23:51:35,339 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2021-10-28 23:51:35,339 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2021-10-28 23:51:35,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 12 transitions. [2021-10-28 23:51:35,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:51:35,340 INFO L681 BuchiCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-10-28 23:51:35,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 12 transitions. [2021-10-28 23:51:35,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-28 23:51:35,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 10 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 23:51:35,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-10-28 23:51:35,344 INFO L704 BuchiCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-10-28 23:51:35,344 INFO L587 BuchiCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-10-28 23:51:35,344 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-10-28 23:51:35,345 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 11 states and 12 transitions. [2021-10-28 23:51:35,345 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2021-10-28 23:51:35,346 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:51:35,346 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:51:35,348 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-28 23:51:35,348 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 1, 1, 1, 1] [2021-10-28 23:51:35,348 INFO L791 eck$LassoCheckResult]: Stem: 107#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 108#L-1 havoc main_#res;havoc main_#t~malloc2.base, main_#t~malloc2.offset, main_#t~malloc3.base, main_#t~malloc3.offset, main_#t~mem6, main_#t~mem5, main_#t~mem7, main_#t~mem4, main_~x1~0.base, main_~x1~0.offset, main_~x2~0.base, main_~x2~0.offset;call main_#t~malloc2.base, main_#t~malloc2.offset := #Ultimate.allocOnStack(4);main_~x1~0.base, main_~x1~0.offset := main_#t~malloc2.base, main_#t~malloc2.offset;call main_#t~malloc3.base, main_#t~malloc3.offset := #Ultimate.allocOnStack(4);main_~x2~0.base, main_~x2~0.offset := main_#t~malloc3.base, main_#t~malloc3.offset; 109#L549-3 [2021-10-28 23:51:35,349 INFO L793 eck$LassoCheckResult]: Loop: 109#L549-3 call main_#t~mem4 := read~int(main_~x1~0.base, main_~x1~0.offset, 4); 105#L549-1 assume !!(main_#t~mem4 <= 10);havoc main_#t~mem4;call write~int(10, main_~x2~0.base, main_~x2~0.offset, 4); 106#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 110#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 111#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 115#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 114#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 113#L551-1 assume !(main_#t~mem5 > 1);havoc main_#t~mem5; 112#L551-4 call main_#t~mem7 := read~int(main_~x1~0.base, main_~x1~0.offset, 4);call write~int(1 + main_#t~mem7, main_~x1~0.base, main_~x1~0.offset, 4);havoc main_#t~mem7; 109#L549-3 [2021-10-28 23:51:35,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:51:35,352 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 4 times [2021-10-28 23:51:35,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:51:35,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722132538] [2021-10-28 23:51:35,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:51:35,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:51:35,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:51:35,383 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:51:35,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:51:35,402 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:51:35,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:51:35,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1970998361, now seen corresponding path program 2 times [2021-10-28 23:51:35,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:51:35,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276113986] [2021-10-28 23:51:35,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:51:35,410 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:51:35,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:51:35,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:51:35,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:51:35,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276113986] [2021-10-28 23:51:35,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276113986] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:51:35,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505121516] [2021-10-28 23:51:35,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:51:35,611 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:51:35,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:51:35,628 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:51:35,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 23:51:35,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:51:35,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:51:35,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 23:51:35,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:51:35,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 23:51:35,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 23:51:35,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 23:51:35,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-28 23:51:35,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:51:35,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505121516] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:51:35,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:51:35,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2021-10-28 23:51:35,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223770589] [2021-10-28 23:51:35,843 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-28 23:51:35,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:51:35,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 23:51:35,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:51:35,845 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. cyclomatic complexity: 2 Second operand has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 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 23:51:35,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:51:35,924 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2021-10-28 23:51:35,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 23:51:35,924 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 14 transitions. [2021-10-28 23:51:35,925 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 11 [2021-10-28 23:51:35,926 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 13 states and 14 transitions. [2021-10-28 23:51:35,926 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2021-10-28 23:51:35,926 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 13 [2021-10-28 23:51:35,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 14 transitions. [2021-10-28 23:51:35,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:51:35,927 INFO L681 BuchiCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-10-28 23:51:35,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 14 transitions. [2021-10-28 23:51:35,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-10-28 23:51:35,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 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 23:51:35,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-10-28 23:51:35,929 INFO L704 BuchiCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-10-28 23:51:35,929 INFO L587 BuchiCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-10-28 23:51:35,929 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-10-28 23:51:35,930 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states and 14 transitions. [2021-10-28 23:51:35,930 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 11 [2021-10-28 23:51:35,930 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:51:35,930 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:51:35,931 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-28 23:51:35,931 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 1, 1, 1, 1] [2021-10-28 23:51:35,931 INFO L791 eck$LassoCheckResult]: Stem: 172#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 173#L-1 havoc main_#res;havoc main_#t~malloc2.base, main_#t~malloc2.offset, main_#t~malloc3.base, main_#t~malloc3.offset, main_#t~mem6, main_#t~mem5, main_#t~mem7, main_#t~mem4, main_~x1~0.base, main_~x1~0.offset, main_~x2~0.base, main_~x2~0.offset;call main_#t~malloc2.base, main_#t~malloc2.offset := #Ultimate.allocOnStack(4);main_~x1~0.base, main_~x1~0.offset := main_#t~malloc2.base, main_#t~malloc2.offset;call main_#t~malloc3.base, main_#t~malloc3.offset := #Ultimate.allocOnStack(4);main_~x2~0.base, main_~x2~0.offset := main_#t~malloc3.base, main_#t~malloc3.offset; 174#L549-3 [2021-10-28 23:51:35,931 INFO L793 eck$LassoCheckResult]: Loop: 174#L549-3 call main_#t~mem4 := read~int(main_~x1~0.base, main_~x1~0.offset, 4); 170#L549-1 assume !!(main_#t~mem4 <= 10);havoc main_#t~mem4;call write~int(10, main_~x2~0.base, main_~x2~0.offset, 4); 171#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 175#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 176#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 177#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 182#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 181#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 180#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 179#L551-1 assume !(main_#t~mem5 > 1);havoc main_#t~mem5; 178#L551-4 call main_#t~mem7 := read~int(main_~x1~0.base, main_~x1~0.offset, 4);call write~int(1 + main_#t~mem7, main_~x1~0.base, main_~x1~0.offset, 4);havoc main_#t~mem7; 174#L549-3 [2021-10-28 23:51:35,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:51:35,932 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 5 times [2021-10-28 23:51:35,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:51:35,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137173125] [2021-10-28 23:51:35,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:51:35,933 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:51:35,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:51:35,941 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:51:35,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:51:35,950 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:51:35,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:51:35,950 INFO L85 PathProgramCache]: Analyzing trace with hash -48795806, now seen corresponding path program 3 times [2021-10-28 23:51:35,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:51:35,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390567526] [2021-10-28 23:51:35,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:51:35,951 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:51:35,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:51:36,137 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 23:51:36,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:51:36,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390567526] [2021-10-28 23:51:36,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390567526] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:51:36,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979501594] [2021-10-28 23:51:36,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:51:36,138 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:51:36,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:51:36,160 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:51:36,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 23:51:36,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-28 23:51:36,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:51:36,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 23:51:36,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:51:36,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 23:51:36,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 23:51:36,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 23:51:36,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 23:51:36,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-28 23:51:36,428 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 23:51:36,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979501594] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:51:36,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:51:36,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 13 [2021-10-28 23:51:36,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905468331] [2021-10-28 23:51:36,430 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-28 23:51:36,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:51:36,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 23:51:36,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-10-28 23:51:36,432 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. cyclomatic complexity: 2 Second operand has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 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 23:51:36,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:51:36,546 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2021-10-28 23:51:36,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:51:36,547 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 15 states and 16 transitions. [2021-10-28 23:51:36,549 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 13 [2021-10-28 23:51:36,551 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 15 states to 15 states and 16 transitions. [2021-10-28 23:51:36,551 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 15 [2021-10-28 23:51:36,552 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 15 [2021-10-28 23:51:36,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 16 transitions. [2021-10-28 23:51:36,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:51:36,552 INFO L681 BuchiCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-10-28 23:51:36,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states and 16 transitions. [2021-10-28 23:51:36,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-10-28 23:51:36,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 14 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 23:51:36,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-10-28 23:51:36,557 INFO L704 BuchiCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-10-28 23:51:36,557 INFO L587 BuchiCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-10-28 23:51:36,557 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-10-28 23:51:36,557 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 15 states and 16 transitions. [2021-10-28 23:51:36,558 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 13 [2021-10-28 23:51:36,558 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:51:36,559 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:51:36,559 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-28 23:51:36,559 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [5, 4, 1, 1, 1, 1] [2021-10-28 23:51:36,560 INFO L791 eck$LassoCheckResult]: Stem: 252#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 253#L-1 havoc main_#res;havoc main_#t~malloc2.base, main_#t~malloc2.offset, main_#t~malloc3.base, main_#t~malloc3.offset, main_#t~mem6, main_#t~mem5, main_#t~mem7, main_#t~mem4, main_~x1~0.base, main_~x1~0.offset, main_~x2~0.base, main_~x2~0.offset;call main_#t~malloc2.base, main_#t~malloc2.offset := #Ultimate.allocOnStack(4);main_~x1~0.base, main_~x1~0.offset := main_#t~malloc2.base, main_#t~malloc2.offset;call main_#t~malloc3.base, main_#t~malloc3.offset := #Ultimate.allocOnStack(4);main_~x2~0.base, main_~x2~0.offset := main_#t~malloc3.base, main_#t~malloc3.offset; 254#L549-3 [2021-10-28 23:51:36,560 INFO L793 eck$LassoCheckResult]: Loop: 254#L549-3 call main_#t~mem4 := read~int(main_~x1~0.base, main_~x1~0.offset, 4); 250#L549-1 assume !!(main_#t~mem4 <= 10);havoc main_#t~mem4;call write~int(10, main_~x2~0.base, main_~x2~0.offset, 4); 251#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 257#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 255#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 256#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 264#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 263#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 262#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 261#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 260#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 259#L551-1 assume !(main_#t~mem5 > 1);havoc main_#t~mem5; 258#L551-4 call main_#t~mem7 := read~int(main_~x1~0.base, main_~x1~0.offset, 4);call write~int(1 + main_#t~mem7, main_~x1~0.base, main_~x1~0.offset, 4);havoc main_#t~mem7; 254#L549-3 [2021-10-28 23:51:36,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:51:36,561 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 6 times [2021-10-28 23:51:36,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:51:36,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824351473] [2021-10-28 23:51:36,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:51:36,562 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:51:36,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:51:36,570 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:51:36,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:51:36,578 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:51:36,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:51:36,579 INFO L85 PathProgramCache]: Analyzing trace with hash 351922269, now seen corresponding path program 4 times [2021-10-28 23:51:36,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:51:36,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633277322] [2021-10-28 23:51:36,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:51:36,580 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:51:36,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:51:36,741 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:51:36,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:51:36,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633277322] [2021-10-28 23:51:36,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633277322] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:51:36,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979771487] [2021-10-28 23:51:36,743 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:51:36,743 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:51:36,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:51:36,748 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:51:36,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 23:51:36,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:51:36,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:51:36,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 23:51:36,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:51:36,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 23:51:36,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 23:51:36,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 23:51:36,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 23:51:36,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 23:51:37,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-28 23:51:37,012 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:51:37,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979771487] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:51:37,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:51:37,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2021-10-28 23:51:37,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528112426] [2021-10-28 23:51:37,014 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-28 23:51:37,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:51:37,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 23:51:37,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-10-28 23:51:37,019 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. cyclomatic complexity: 2 Second operand has 16 states, 16 states have (on average 1.375) internal successors, (22), 16 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 23:51:37,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:51:37,144 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2021-10-28 23:51:37,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 23:51:37,144 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 17 states and 18 transitions. [2021-10-28 23:51:37,145 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 15 [2021-10-28 23:51:37,146 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 17 states to 17 states and 18 transitions. [2021-10-28 23:51:37,146 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2021-10-28 23:51:37,146 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2021-10-28 23:51:37,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 18 transitions. [2021-10-28 23:51:37,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:51:37,147 INFO L681 BuchiCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-10-28 23:51:37,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states and 18 transitions. [2021-10-28 23:51:37,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-28 23:51:37,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 16 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 23:51:37,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-10-28 23:51:37,150 INFO L704 BuchiCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-10-28 23:51:37,150 INFO L587 BuchiCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-10-28 23:51:37,150 INFO L425 BuchiCegarLoop]: ======== Iteration 7============ [2021-10-28 23:51:37,150 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 18 transitions. [2021-10-28 23:51:37,151 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 15 [2021-10-28 23:51:37,151 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:51:37,151 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:51:37,152 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-28 23:51:37,152 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 1, 1, 1, 1] [2021-10-28 23:51:37,152 INFO L791 eck$LassoCheckResult]: Stem: 347#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 348#L-1 havoc main_#res;havoc main_#t~malloc2.base, main_#t~malloc2.offset, main_#t~malloc3.base, main_#t~malloc3.offset, main_#t~mem6, main_#t~mem5, main_#t~mem7, main_#t~mem4, main_~x1~0.base, main_~x1~0.offset, main_~x2~0.base, main_~x2~0.offset;call main_#t~malloc2.base, main_#t~malloc2.offset := #Ultimate.allocOnStack(4);main_~x1~0.base, main_~x1~0.offset := main_#t~malloc2.base, main_#t~malloc2.offset;call main_#t~malloc3.base, main_#t~malloc3.offset := #Ultimate.allocOnStack(4);main_~x2~0.base, main_~x2~0.offset := main_#t~malloc3.base, main_#t~malloc3.offset; 349#L549-3 [2021-10-28 23:51:37,152 INFO L793 eck$LassoCheckResult]: Loop: 349#L549-3 call main_#t~mem4 := read~int(main_~x1~0.base, main_~x1~0.offset, 4); 345#L549-1 assume !!(main_#t~mem4 <= 10);havoc main_#t~mem4;call write~int(10, main_~x2~0.base, main_~x2~0.offset, 4); 346#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 352#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 350#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 351#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 361#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 360#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 359#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 358#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 357#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 356#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 355#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 354#L551-1 assume !(main_#t~mem5 > 1);havoc main_#t~mem5; 353#L551-4 call main_#t~mem7 := read~int(main_~x1~0.base, main_~x1~0.offset, 4);call write~int(1 + main_#t~mem7, main_~x1~0.base, main_~x1~0.offset, 4);havoc main_#t~mem7; 349#L549-3 [2021-10-28 23:51:37,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:51:37,153 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 7 times [2021-10-28 23:51:37,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:51:37,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469780808] [2021-10-28 23:51:37,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:51:37,154 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:51:37,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:51:37,161 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:51:37,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:51:37,168 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:51:37,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:51:37,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1105064296, now seen corresponding path program 5 times [2021-10-28 23:51:37,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:51:37,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430649739] [2021-10-28 23:51:37,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:51:37,170 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:51:37,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:51:37,381 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:51:37,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:51:37,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430649739] [2021-10-28 23:51:37,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430649739] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:51:37,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435939241] [2021-10-28 23:51:37,387 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:51:37,388 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:51:37,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:51:37,392 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:51:37,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 23:51:37,478 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-28 23:51:37,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:51:37,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 23:51:37,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:51:37,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 23:51:37,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 23:51:37,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 23:51:37,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 23:51:37,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 23:51:37,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 23:51:37,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-28 23:51:37,664 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:51:37,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435939241] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:51:37,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:51:37,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 19 [2021-10-28 23:51:37,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324718485] [2021-10-28 23:51:37,668 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-28 23:51:37,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:51:37,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 23:51:37,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-10-28 23:51:37,670 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. cyclomatic complexity: 2 Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 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 23:51:37,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:51:37,855 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-10-28 23:51:37,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 23:51:37,856 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 19 states and 20 transitions. [2021-10-28 23:51:37,857 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 17 [2021-10-28 23:51:37,858 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 19 states to 19 states and 20 transitions. [2021-10-28 23:51:37,858 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2021-10-28 23:51:37,858 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2021-10-28 23:51:37,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 20 transitions. [2021-10-28 23:51:37,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:51:37,858 INFO L681 BuchiCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-10-28 23:51:37,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states and 20 transitions. [2021-10-28 23:51:37,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-10-28 23:51:37,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 18 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 23:51:37,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-10-28 23:51:37,861 INFO L704 BuchiCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-10-28 23:51:37,861 INFO L587 BuchiCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-10-28 23:51:37,861 INFO L425 BuchiCegarLoop]: ======== Iteration 8============ [2021-10-28 23:51:37,862 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 20 transitions. [2021-10-28 23:51:37,863 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 17 [2021-10-28 23:51:37,863 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:51:37,863 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:51:37,864 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-28 23:51:37,864 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [7, 6, 1, 1, 1, 1] [2021-10-28 23:51:37,864 INFO L791 eck$LassoCheckResult]: Stem: 457#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 458#L-1 havoc main_#res;havoc main_#t~malloc2.base, main_#t~malloc2.offset, main_#t~malloc3.base, main_#t~malloc3.offset, main_#t~mem6, main_#t~mem5, main_#t~mem7, main_#t~mem4, main_~x1~0.base, main_~x1~0.offset, main_~x2~0.base, main_~x2~0.offset;call main_#t~malloc2.base, main_#t~malloc2.offset := #Ultimate.allocOnStack(4);main_~x1~0.base, main_~x1~0.offset := main_#t~malloc2.base, main_#t~malloc2.offset;call main_#t~malloc3.base, main_#t~malloc3.offset := #Ultimate.allocOnStack(4);main_~x2~0.base, main_~x2~0.offset := main_#t~malloc3.base, main_#t~malloc3.offset; 459#L549-3 [2021-10-28 23:51:37,865 INFO L793 eck$LassoCheckResult]: Loop: 459#L549-3 call main_#t~mem4 := read~int(main_~x1~0.base, main_~x1~0.offset, 4); 455#L549-1 assume !!(main_#t~mem4 <= 10);havoc main_#t~mem4;call write~int(10, main_~x2~0.base, main_~x2~0.offset, 4); 456#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 462#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 460#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 461#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 473#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 472#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 471#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 470#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 469#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 468#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 467#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 466#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 465#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 464#L551-1 assume !(main_#t~mem5 > 1);havoc main_#t~mem5; 463#L551-4 call main_#t~mem7 := read~int(main_~x1~0.base, main_~x1~0.offset, 4);call write~int(1 + main_#t~mem7, main_~x1~0.base, main_~x1~0.offset, 4);havoc main_#t~mem7; 459#L549-3 [2021-10-28 23:51:37,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:51:37,865 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 8 times [2021-10-28 23:51:37,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:51:37,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051463432] [2021-10-28 23:51:37,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:51:37,866 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:51:37,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:51:37,873 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:51:37,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:51:37,879 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:51:37,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:51:37,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1109814765, now seen corresponding path program 6 times [2021-10-28 23:51:37,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:51:37,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571247648] [2021-10-28 23:51:37,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:51:37,881 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:51:37,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:51:38,063 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:51:38,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:51:38,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571247648] [2021-10-28 23:51:38,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571247648] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:51:38,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394516681] [2021-10-28 23:51:38,064 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:51:38,064 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:51:38,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:51:38,072 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:51:38,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 23:51:38,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-28 23:51:38,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:51:38,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 23:51:38,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:51:38,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 23:51:38,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 23:51:38,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 23:51:38,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 23:51:38,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 23:51:38,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 23:51:38,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 23:51:38,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-28 23:51:38,358 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:51:38,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394516681] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:51:38,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:51:38,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 22 [2021-10-28 23:51:38,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534103029] [2021-10-28 23:51:38,359 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-28 23:51:38,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:51:38,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-28 23:51:38,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-10-28 23:51:38,361 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. cyclomatic complexity: 2 Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 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 23:51:38,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:51:38,556 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2021-10-28 23:51:38,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 23:51:38,557 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 21 states and 22 transitions. [2021-10-28 23:51:38,559 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 19 [2021-10-28 23:51:38,559 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 21 states to 21 states and 22 transitions. [2021-10-28 23:51:38,560 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 21 [2021-10-28 23:51:38,560 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 21 [2021-10-28 23:51:38,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 22 transitions. [2021-10-28 23:51:38,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:51:38,560 INFO L681 BuchiCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-10-28 23:51:38,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states and 22 transitions. [2021-10-28 23:51:38,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-10-28 23:51:38,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 20 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 23:51:38,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-10-28 23:51:38,562 INFO L704 BuchiCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-10-28 23:51:38,562 INFO L587 BuchiCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-10-28 23:51:38,562 INFO L425 BuchiCegarLoop]: ======== Iteration 9============ [2021-10-28 23:51:38,563 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states and 22 transitions. [2021-10-28 23:51:38,563 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 19 [2021-10-28 23:51:38,563 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:51:38,563 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:51:38,564 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-28 23:51:38,564 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [8, 7, 1, 1, 1, 1] [2021-10-28 23:51:38,564 INFO L791 eck$LassoCheckResult]: Stem: 582#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 583#L-1 havoc main_#res;havoc main_#t~malloc2.base, main_#t~malloc2.offset, main_#t~malloc3.base, main_#t~malloc3.offset, main_#t~mem6, main_#t~mem5, main_#t~mem7, main_#t~mem4, main_~x1~0.base, main_~x1~0.offset, main_~x2~0.base, main_~x2~0.offset;call main_#t~malloc2.base, main_#t~malloc2.offset := #Ultimate.allocOnStack(4);main_~x1~0.base, main_~x1~0.offset := main_#t~malloc2.base, main_#t~malloc2.offset;call main_#t~malloc3.base, main_#t~malloc3.offset := #Ultimate.allocOnStack(4);main_~x2~0.base, main_~x2~0.offset := main_#t~malloc3.base, main_#t~malloc3.offset; 584#L549-3 [2021-10-28 23:51:38,565 INFO L793 eck$LassoCheckResult]: Loop: 584#L549-3 call main_#t~mem4 := read~int(main_~x1~0.base, main_~x1~0.offset, 4); 580#L549-1 assume !!(main_#t~mem4 <= 10);havoc main_#t~mem4;call write~int(10, main_~x2~0.base, main_~x2~0.offset, 4); 581#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 585#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 586#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 587#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 600#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 599#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 598#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 597#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 596#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 595#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 594#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 593#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 592#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 591#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 590#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 589#L551-1 assume !(main_#t~mem5 > 1);havoc main_#t~mem5; 588#L551-4 call main_#t~mem7 := read~int(main_~x1~0.base, main_~x1~0.offset, 4);call write~int(1 + main_#t~mem7, main_~x1~0.base, main_~x1~0.offset, 4);havoc main_#t~mem7; 584#L549-3 [2021-10-28 23:51:38,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:51:38,565 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 9 times [2021-10-28 23:51:38,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:51:38,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386581612] [2021-10-28 23:51:38,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:51:38,566 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:51:38,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:51:38,572 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:51:38,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:51:38,577 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:51:38,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:51:38,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1380048178, now seen corresponding path program 7 times [2021-10-28 23:51:38,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:51:38,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64037644] [2021-10-28 23:51:38,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:51:38,579 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:51:38,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:51:38,810 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:51:38,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:51:38,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64037644] [2021-10-28 23:51:38,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64037644] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:51:38,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117157756] [2021-10-28 23:51:38,812 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:51:38,812 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:51:38,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:51:38,817 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:51:38,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 23:51:38,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:51:38,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 23:51:38,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:51:38,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 23:51:38,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 23:51:38,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 23:51:38,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 23:51:39,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 23:51:39,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 23:51:39,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 23:51:39,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 23:51:39,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-28 23:51:39,127 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:51:39,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117157756] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:51:39,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:51:39,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 25 [2021-10-28 23:51:39,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359021603] [2021-10-28 23:51:39,128 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-28 23:51:39,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:51:39,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-28 23:51:39,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2021-10-28 23:51:39,130 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. cyclomatic complexity: 2 Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 23:51:39,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:51:39,314 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2021-10-28 23:51:39,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 23:51:39,314 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 23 states and 24 transitions. [2021-10-28 23:51:39,315 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 21 [2021-10-28 23:51:39,315 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 23 states to 23 states and 24 transitions. [2021-10-28 23:51:39,315 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 23 [2021-10-28 23:51:39,316 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 23 [2021-10-28 23:51:39,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 24 transitions. [2021-10-28 23:51:39,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:51:39,316 INFO L681 BuchiCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-10-28 23:51:39,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 24 transitions. [2021-10-28 23:51:39,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-10-28 23:51:39,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 22 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 23:51:39,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-10-28 23:51:39,318 INFO L704 BuchiCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-10-28 23:51:39,318 INFO L587 BuchiCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-10-28 23:51:39,318 INFO L425 BuchiCegarLoop]: ======== Iteration 10============ [2021-10-28 23:51:39,318 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 24 transitions. [2021-10-28 23:51:39,318 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 21 [2021-10-28 23:51:39,318 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:51:39,318 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:51:39,319 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-28 23:51:39,319 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [9, 8, 1, 1, 1, 1] [2021-10-28 23:51:39,319 INFO L791 eck$LassoCheckResult]: Stem: 722#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 723#L-1 havoc main_#res;havoc main_#t~malloc2.base, main_#t~malloc2.offset, main_#t~malloc3.base, main_#t~malloc3.offset, main_#t~mem6, main_#t~mem5, main_#t~mem7, main_#t~mem4, main_~x1~0.base, main_~x1~0.offset, main_~x2~0.base, main_~x2~0.offset;call main_#t~malloc2.base, main_#t~malloc2.offset := #Ultimate.allocOnStack(4);main_~x1~0.base, main_~x1~0.offset := main_#t~malloc2.base, main_#t~malloc2.offset;call main_#t~malloc3.base, main_#t~malloc3.offset := #Ultimate.allocOnStack(4);main_~x2~0.base, main_~x2~0.offset := main_#t~malloc3.base, main_#t~malloc3.offset; 724#L549-3 [2021-10-28 23:51:39,319 INFO L793 eck$LassoCheckResult]: Loop: 724#L549-3 call main_#t~mem4 := read~int(main_~x1~0.base, main_~x1~0.offset, 4); 720#L549-1 assume !!(main_#t~mem4 <= 10);havoc main_#t~mem4;call write~int(10, main_~x2~0.base, main_~x2~0.offset, 4); 721#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 725#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 726#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 727#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 742#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 741#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 740#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 739#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 738#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 737#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 736#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 735#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 734#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 733#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 732#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 731#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 730#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 729#L551-1 assume !(main_#t~mem5 > 1);havoc main_#t~mem5; 728#L551-4 call main_#t~mem7 := read~int(main_~x1~0.base, main_~x1~0.offset, 4);call write~int(1 + main_#t~mem7, main_~x1~0.base, main_~x1~0.offset, 4);havoc main_#t~mem7; 724#L549-3 [2021-10-28 23:51:39,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:51:39,320 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 10 times [2021-10-28 23:51:39,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:51:39,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252184950] [2021-10-28 23:51:39,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:51:39,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:51:39,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:51:39,326 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:51:39,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:51:39,331 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:51:39,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:51:39,332 INFO L85 PathProgramCache]: Analyzing trace with hash 918646985, now seen corresponding path program 8 times [2021-10-28 23:51:39,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:51:39,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976111924] [2021-10-28 23:51:39,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:51:39,333 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:51:39,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:51:39,639 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:51:39,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:51:39,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976111924] [2021-10-28 23:51:39,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976111924] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:51:39,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647903673] [2021-10-28 23:51:39,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:51:39,641 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:51:39,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:51:39,648 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:51:39,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 23:51:39,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:51:39,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:51:39,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 23:51:39,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:51:39,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 23:51:39,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 23:51:39,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 23:51:39,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 23:51:39,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 23:51:39,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 23:51:39,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 23:51:39,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 23:51:39,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 23:51:39,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-28 23:51:39,995 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:51:39,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647903673] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:51:39,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:51:39,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12] total 28 [2021-10-28 23:51:39,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033273373] [2021-10-28 23:51:39,996 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-28 23:51:39,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:51:39,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-28 23:51:39,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=551, Unknown=0, NotChecked=0, Total=756 [2021-10-28 23:51:39,998 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. cyclomatic complexity: 2 Second operand has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 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 23:51:40,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:51:40,237 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-10-28 23:51:40,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-28 23:51:40,238 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 26 transitions. [2021-10-28 23:51:40,238 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 23 [2021-10-28 23:51:40,239 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 25 states and 26 transitions. [2021-10-28 23:51:40,239 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2021-10-28 23:51:40,239 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 25 [2021-10-28 23:51:40,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 26 transitions. [2021-10-28 23:51:40,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:51:40,240 INFO L681 BuchiCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-10-28 23:51:40,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 26 transitions. [2021-10-28 23:51:40,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-10-28 23:51:40,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 25 states have (on average 1.04) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 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 23:51:40,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-10-28 23:51:40,242 INFO L704 BuchiCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-10-28 23:51:40,242 INFO L587 BuchiCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-10-28 23:51:40,242 INFO L425 BuchiCegarLoop]: ======== Iteration 11============ [2021-10-28 23:51:40,242 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 25 states and 26 transitions. [2021-10-28 23:51:40,242 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 23 [2021-10-28 23:51:40,243 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:51:40,243 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:51:40,243 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-28 23:51:40,243 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [10, 9, 1, 1, 1, 1] [2021-10-28 23:51:40,243 INFO L791 eck$LassoCheckResult]: Stem: 877#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 878#L-1 havoc main_#res;havoc main_#t~malloc2.base, main_#t~malloc2.offset, main_#t~malloc3.base, main_#t~malloc3.offset, main_#t~mem6, main_#t~mem5, main_#t~mem7, main_#t~mem4, main_~x1~0.base, main_~x1~0.offset, main_~x2~0.base, main_~x2~0.offset;call main_#t~malloc2.base, main_#t~malloc2.offset := #Ultimate.allocOnStack(4);main_~x1~0.base, main_~x1~0.offset := main_#t~malloc2.base, main_#t~malloc2.offset;call main_#t~malloc3.base, main_#t~malloc3.offset := #Ultimate.allocOnStack(4);main_~x2~0.base, main_~x2~0.offset := main_#t~malloc3.base, main_#t~malloc3.offset; 879#L549-3 [2021-10-28 23:51:40,244 INFO L793 eck$LassoCheckResult]: Loop: 879#L549-3 call main_#t~mem4 := read~int(main_~x1~0.base, main_~x1~0.offset, 4); 875#L549-1 assume !!(main_#t~mem4 <= 10);havoc main_#t~mem4;call write~int(10, main_~x2~0.base, main_~x2~0.offset, 4); 876#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 882#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 880#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 881#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 899#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 898#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 897#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 896#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 895#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 894#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 893#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 892#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 891#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 890#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 889#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 888#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 887#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 886#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 885#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 884#L551-1 assume !(main_#t~mem5 > 1);havoc main_#t~mem5; 883#L551-4 call main_#t~mem7 := read~int(main_~x1~0.base, main_~x1~0.offset, 4);call write~int(1 + main_#t~mem7, main_~x1~0.base, main_~x1~0.offset, 4);havoc main_#t~mem7; 879#L549-3 [2021-10-28 23:51:40,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:51:40,244 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 11 times [2021-10-28 23:51:40,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:51:40,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675052624] [2021-10-28 23:51:40,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:51:40,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:51:40,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:51:40,250 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:51:40,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:51:40,254 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:51:40,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:51:40,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1943458812, now seen corresponding path program 9 times [2021-10-28 23:51:40,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:51:40,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064303509] [2021-10-28 23:51:40,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:51:40,260 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:51:40,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:51:40,301 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:51:40,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:51:40,346 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:51:40,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:51:40,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1979445758, now seen corresponding path program 1 times [2021-10-28 23:51:40,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:51:40,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226345851] [2021-10-28 23:51:40,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:51:40,348 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:51:40,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:51:40,373 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:51:40,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:51:40,437 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:51:44,364 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:51:44,365 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:51:44,365 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:51:44,365 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:51:44,365 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 23:51:44,365 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:51:44,366 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:51:44,366 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:51:44,366 INFO L133 ssoRankerPreferences]: Filename of dumped script: Urban-2013WST-Fig2-alloca.i_Iteration11_Lasso [2021-10-28 23:51:44,366 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:51:44,366 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:51:44,387 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:51:44,392 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:51:44,394 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:51:44,582 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:51:44,587 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:51:44,589 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:51:44,592 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:51:44,594 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:51:44,597 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:51:44,601 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:51:44,604 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:51:44,865 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:51:44,869 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 23:51:44,871 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:51:44,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:51:44,873 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:51:44,880 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:51:44,890 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:51:44,890 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:51:44,891 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:51:44,891 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:51:44,891 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:51:44,893 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:51:44,893 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:51:44,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-10-28 23:51:44,911 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:51:44,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-10-28 23:51:44,953 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:51:44,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:51:44,955 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:51:44,967 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:51:44,979 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:51:44,980 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:51:44,980 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:51:44,980 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:51:44,980 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:51:44,981 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:51:44,981 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:51:44,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-10-28 23:51:44,995 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:51:45,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-10-28 23:51:45,031 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:51:45,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:51:45,033 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:51:45,040 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:51:45,052 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:51:45,052 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:51:45,052 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:51:45,052 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:51:45,060 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 23:51:45,062 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 23:51:45,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-10-28 23:51:45,083 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:51:45,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-10-28 23:51:45,110 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:51:45,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:51:45,111 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:51:45,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-10-28 23:51:45,114 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:51:45,122 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:51:45,122 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:51:45,122 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:51:45,122 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:51:45,127 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 23:51:45,127 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 23:51:45,137 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:51:45,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Ended with exit code 0 [2021-10-28 23:51:45,163 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:51:45,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:51:45,165 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:51:45,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-10-28 23:51:45,168 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:51:45,176 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:51:45,176 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:51:45,177 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:51:45,177 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:51:45,179 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 23:51:45,179 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 23:51:45,215 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:51:45,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2021-10-28 23:51:45,255 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:51:45,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:51:45,256 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:51:45,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-10-28 23:51:45,269 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:51:45,277 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:51:45,277 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:51:45,277 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:51:45,277 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:51:45,287 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 23:51:45,287 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 23:51:45,311 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:51:45,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-10-28 23:51:45,352 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:51:45,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:51:45,354 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:51:45,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-10-28 23:51:45,396 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:51:45,403 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:51:45,404 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:51:45,404 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:51:45,404 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:51:45,404 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:51:45,405 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:51:45,405 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:51:45,406 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:51:45,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-10-28 23:51:45,428 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:51:45,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:51:45,429 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:51:45,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-10-28 23:51:45,434 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:51:45,442 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:51:45,442 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:51:45,443 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:51:45,443 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:51:45,443 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:51:45,444 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:51:45,444 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:51:45,446 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 23:51:45,472 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-28 23:51:45,472 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-10-28 23:51:45,474 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:51:45,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:51:45,480 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:51:45,491 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 23:51:45,492 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 23:51:45,492 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 23:51:45,492 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(v_rep(select (select #memory_int ULTIMATE.start_main_~x1~0.base) ULTIMATE.start_main_~x1~0.offset)_1) = -2*v_rep(select (select #memory_int ULTIMATE.start_main_~x1~0.base) ULTIMATE.start_main_~x1~0.offset)_1 + 21 Supporting invariants [] [2021-10-28 23:51:45,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-10-28 23:51:45,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-10-28 23:51:45,576 INFO L297 tatePredicateManager]: 9 out of 11 supporting invariants were superfluous and have been removed [2021-10-28 23:51:45,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:51:45,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:51:45,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 23:51:45,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:51:45,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:51:45,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-28 23:51:45,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:51:45,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2021-10-28 23:51:45,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 30 [2021-10-28 23:51:45,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 30 [2021-10-28 23:51:46,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 30 [2021-10-28 23:51:46,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 30 [2021-10-28 23:51:46,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 30 [2021-10-28 23:51:46,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 30 [2021-10-28 23:51:46,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 30 [2021-10-28 23:51:46,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 30 [2021-10-28 23:51:46,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-10-28 23:51:46,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 30 [2021-10-28 23:51:46,665 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:51:46,668 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 12 loop predicates [2021-10-28 23:51:46,669 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 25 states and 26 transitions. cyclomatic complexity: 2 Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 23:51:47,044 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 25 states and 26 transitions. cyclomatic complexity: 2. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 57 states and 62 transitions. Complement of second has 26 states. [2021-10-28 23:51:47,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 14 states 1 stem states 12 non-accepting loop states 1 accepting loop states [2021-10-28 23:51:47,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 23:51:47,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 31 transitions. [2021-10-28 23:51:47,047 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 14 states and 31 transitions. Stem has 2 letters. Loop has 23 letters. [2021-10-28 23:51:47,048 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:51:47,049 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 14 states and 31 transitions. Stem has 25 letters. Loop has 23 letters. [2021-10-28 23:51:47,050 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:51:47,050 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 14 states and 31 transitions. Stem has 2 letters. Loop has 46 letters. [2021-10-28 23:51:47,052 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:51:47,053 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 57 states and 62 transitions. [2021-10-28 23:51:47,054 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 25 [2021-10-28 23:51:47,059 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 57 states to 56 states and 61 transitions. [2021-10-28 23:51:47,060 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 28 [2021-10-28 23:51:47,060 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 29 [2021-10-28 23:51:47,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 61 transitions. [2021-10-28 23:51:47,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:51:47,060 INFO L681 BuchiCegarLoop]: Abstraction has 56 states and 61 transitions. [2021-10-28 23:51:47,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states and 61 transitions. [2021-10-28 23:51:47,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-10-28 23:51:47,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 54 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 23:51:47,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2021-10-28 23:51:47,068 INFO L704 BuchiCegarLoop]: Abstraction has 55 states and 60 transitions. [2021-10-28 23:51:47,068 INFO L587 BuchiCegarLoop]: Abstraction has 55 states and 60 transitions. [2021-10-28 23:51:47,068 INFO L425 BuchiCegarLoop]: ======== Iteration 12============ [2021-10-28 23:51:47,069 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 55 states and 60 transitions. [2021-10-28 23:51:47,069 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 25 [2021-10-28 23:51:47,069 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:51:47,069 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:51:47,070 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-10-28 23:51:47,071 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [11, 10, 1, 1, 1, 1] [2021-10-28 23:51:47,071 INFO L791 eck$LassoCheckResult]: Stem: 1148#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 1149#L-1 havoc main_#res;havoc main_#t~malloc2.base, main_#t~malloc2.offset, main_#t~malloc3.base, main_#t~malloc3.offset, main_#t~mem6, main_#t~mem5, main_#t~mem7, main_#t~mem4, main_~x1~0.base, main_~x1~0.offset, main_~x2~0.base, main_~x2~0.offset;call main_#t~malloc2.base, main_#t~malloc2.offset := #Ultimate.allocOnStack(4);main_~x1~0.base, main_~x1~0.offset := main_#t~malloc2.base, main_#t~malloc2.offset;call main_#t~malloc3.base, main_#t~malloc3.offset := #Ultimate.allocOnStack(4);main_~x2~0.base, main_~x2~0.offset := main_#t~malloc3.base, main_#t~malloc3.offset; 1158#L549-3 call main_#t~mem4 := read~int(main_~x1~0.base, main_~x1~0.offset, 4); 1144#L549-1 [2021-10-28 23:51:47,071 INFO L793 eck$LassoCheckResult]: Loop: 1144#L549-1 assume !!(main_#t~mem4 <= 10);havoc main_#t~mem4;call write~int(10, main_~x2~0.base, main_~x2~0.offset, 4); 1145#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 1156#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 1152#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 1153#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 1178#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 1177#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 1176#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 1175#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 1174#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 1173#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 1172#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 1171#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 1170#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 1169#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 1168#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 1167#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 1166#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 1165#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 1164#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 1163#L551-1 assume !!(main_#t~mem5 > 1);havoc main_#t~mem5;call main_#t~mem6 := read~int(main_~x2~0.base, main_~x2~0.offset, 4);call write~int(main_#t~mem6 - 1, main_~x2~0.base, main_~x2~0.offset, 4);havoc main_#t~mem6; 1162#L551-3 call main_#t~mem5 := read~int(main_~x2~0.base, main_~x2~0.offset, 4); 1161#L551-1 assume !(main_#t~mem5 > 1);havoc main_#t~mem5; 1159#L551-4 call main_#t~mem7 := read~int(main_~x1~0.base, main_~x1~0.offset, 4);call write~int(1 + main_#t~mem7, main_~x1~0.base, main_~x1~0.offset, 4);havoc main_#t~mem7; 1150#L549-3 call main_#t~mem4 := read~int(main_~x1~0.base, main_~x1~0.offset, 4); 1144#L549-1 [2021-10-28 23:51:47,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:51:47,073 INFO L85 PathProgramCache]: Analyzing trace with hash 29860, now seen corresponding path program 1 times [2021-10-28 23:51:47,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:51:47,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925633248] [2021-10-28 23:51:47,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:51:47,074 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:51:47,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:51:47,085 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:51:47,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:51:47,094 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:51:47,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:51:47,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1726515181, now seen corresponding path program 10 times [2021-10-28 23:51:47,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:51:47,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31911360] [2021-10-28 23:51:47,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:51:47,095 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:51:47,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:51:47,446 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 84 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:51:47,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:51:47,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31911360] [2021-10-28 23:51:47,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31911360] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:51:47,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818148457] [2021-10-28 23:51:47,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:51:47,447 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:51:47,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:51:47,448 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:51:47,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 23:51:47,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:51:47,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:51:47,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 23:51:47,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:51:47,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 23:51:47,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 23:51:47,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 23:51:47,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 23:51:47,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 23:51:47,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 23:51:47,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 23:51:47,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 23:51:47,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 23:51:47,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 23:51:47,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-28 23:51:47,992 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 20 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:51:47,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818148457] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:51:47,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:51:47,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12] total 30 [2021-10-28 23:51:47,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815107876] [2021-10-28 23:51:47,994 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-28 23:51:47,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:51:47,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-28 23:51:47,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=725, Unknown=0, NotChecked=0, Total=930 [2021-10-28 23:51:47,998 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. cyclomatic complexity: 7 Second operand has 31 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 30 states have internal predecessors, (44), 0 states have call successors, (0), 0 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 23:51:48,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:51:48,363 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-10-28 23:51:48,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-28 23:51:48,363 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 49 states and 50 transitions. [2021-10-28 23:51:48,364 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-28 23:51:48,364 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 49 states to 0 states and 0 transitions. [2021-10-28 23:51:48,365 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-10-28 23:51:48,365 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-10-28 23:51:48,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-10-28 23:51:48,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:51:48,365 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 23:51:48,365 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 23:51:48,365 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 23:51:48,365 INFO L425 BuchiCegarLoop]: ======== Iteration 13============ [2021-10-28 23:51:48,365 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-10-28 23:51:48,365 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-28 23:51:48,365 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-10-28 23:51:48,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.10 11:51:48 BoogieIcfgContainer [2021-10-28 23:51:48,376 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-10-28 23:51:48,376 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 23:51:48,377 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 23:51:48,377 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 23:51:48,377 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:51:34" (3/4) ... [2021-10-28 23:51:48,381 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-28 23:51:48,381 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 23:51:48,383 INFO L168 Benchmark]: Toolchain (without parser) took 15142.99 ms. Allocated memory was 96.5 MB in the beginning and 151.0 MB in the end (delta: 54.5 MB). Free memory was 62.7 MB in the beginning and 81.7 MB in the end (delta: -19.0 MB). Peak memory consumption was 35.2 MB. Max. memory is 16.1 GB. [2021-10-28 23:51:48,383 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 96.5 MB. Free memory was 51.0 MB in the beginning and 50.9 MB in the end (delta: 69.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:51:48,384 INFO L168 Benchmark]: CACSL2BoogieTranslator took 502.30 ms. Allocated memory is still 96.5 MB. Free memory was 62.5 MB in the beginning and 67.6 MB in the end (delta: -5.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 23:51:48,385 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.37 ms. Allocated memory is still 96.5 MB. Free memory was 67.6 MB in the beginning and 65.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:51:48,385 INFO L168 Benchmark]: Boogie Preprocessor took 25.98 ms. Allocated memory is still 96.5 MB. Free memory was 65.9 MB in the beginning and 65.0 MB in the end (delta: 869.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:51:48,386 INFO L168 Benchmark]: RCFGBuilder took 392.90 ms. Allocated memory is still 96.5 MB. Free memory was 65.0 MB in the beginning and 55.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 23:51:48,386 INFO L168 Benchmark]: BuchiAutomizer took 14163.75 ms. Allocated memory was 96.5 MB in the beginning and 151.0 MB in the end (delta: 54.5 MB). Free memory was 55.4 MB in the beginning and 81.7 MB in the end (delta: -26.3 MB). Peak memory consumption was 29.5 MB. Max. memory is 16.1 GB. [2021-10-28 23:51:48,386 INFO L168 Benchmark]: Witness Printer took 4.60 ms. Allocated memory is still 151.0 MB. Free memory is still 81.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:51:48,389 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 96.5 MB. Free memory was 51.0 MB in the beginning and 50.9 MB in the end (delta: 69.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 502.30 ms. Allocated memory is still 96.5 MB. Free memory was 62.5 MB in the beginning and 67.6 MB in the end (delta: -5.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.37 ms. Allocated memory is still 96.5 MB. Free memory was 67.6 MB in the beginning and 65.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.98 ms. Allocated memory is still 96.5 MB. Free memory was 65.9 MB in the beginning and 65.0 MB in the end (delta: 869.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 392.90 ms. Allocated memory is still 96.5 MB. Free memory was 65.0 MB in the beginning and 55.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 14163.75 ms. Allocated memory was 96.5 MB in the beginning and 151.0 MB in the end (delta: 54.5 MB). Free memory was 55.4 MB in the beginning and 81.7 MB in the end (delta: -26.3 MB). Peak memory consumption was 29.5 MB. Max. memory is 16.1 GB. * Witness Printer took 4.60 ms. Allocated memory is still 151.0 MB. Free memory is still 81.7 MB. There was no memory consumed. 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 12 terminating modules (11 trivial, 1 deterministic, 0 nondeterministic). One deterministic module has affine ranking function 21 + -2 * unknown-#memory_int-unknown[x1][x1] and consists of 14 locations. 11 modules have a trivial ranking function, the largest among these consists of 31 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 14.0s and 13 iterations. TraceHistogramMax:11. Analysis of lassos took 10.7s. Construction of modules took 0.9s. Büchi inclusion checks took 2.1s. Highest rank in rank-based complementation 3. Minimization of det autom 11. Minimization of nondet autom 1. Automata minimization 0.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 55 states and ocurred in iteration 11. Nontrivial modules had stage [1, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/90 HoareTripleCheckerStatistics: 73 SDtfs, 115 SDslu, 123 SDs, 0 SdLazy, 1381 SolverSat, 44 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time LassoAnalysisResults: nont0 unkn0 SFLI11 SFLT0 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso1 LassoPreprocessingBenchmarks: Lassos: inital153 mio100 ax111 hnf100 lsp85 ukn72 mio100 lsp44 div100 bol100 ite100 ukn100 eq191 hnf88 smp100 dnf100 smp100 tf100 neg100 sie100 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 51ms VariablesStem: 2 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 0 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-10-28 23:51:48,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-28 23:51:48,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 23:51:48,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-10-28 23:51:49,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 23:51:49,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 23:51:49,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 23:51:49,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 23:51:49,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 23:51:50,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 23:51:50,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fec4d87a-0f9d-4a52-b119-eeeb43766c8a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Ended with exit code 0 Received shutdown request...