./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/NonTermination3-2.c --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_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NonTermination3-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg --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 a0671ae6ff503095cbeea151b096da898df643465964474a4f3e3c55275f454c ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 09:49:51,148 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 09:49:51,151 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 09:49:51,190 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 09:49:51,191 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 09:49:51,193 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 09:49:51,195 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 09:49:51,199 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 09:49:51,202 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 09:49:51,204 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 09:49:51,205 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 09:49:51,208 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 09:49:51,209 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 09:49:51,211 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 09:49:51,213 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 09:49:51,216 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 09:49:51,218 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 09:49:51,220 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 09:49:51,224 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 09:49:51,227 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 09:49:51,231 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 09:49:51,233 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 09:49:51,235 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 09:49:51,237 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 09:49:51,243 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 09:49:51,244 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 09:49:51,245 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 09:49:51,247 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 09:49:51,248 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 09:49:51,250 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 09:49:51,251 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 09:49:51,253 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 09:49:51,254 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 09:49:51,256 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 09:49:51,258 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 09:49:51,259 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 09:49:51,260 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 09:49:51,261 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 09:49:51,262 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 09:49:51,264 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 09:49:51,265 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 09:49:51,267 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-10-28 09:49:51,302 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 09:49:51,303 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 09:49:51,303 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 09:49:51,304 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 09:49:51,305 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 09:49:51,306 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 09:49:51,306 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 09:49:51,307 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-10-28 09:49:51,307 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-10-28 09:49:51,307 INFO L138 SettingsManager]: * Use old map elimination=false [2021-10-28 09:49:51,308 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-10-28 09:49:51,308 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-10-28 09:49:51,309 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-10-28 09:49:51,309 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 09:49:51,309 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 09:49:51,310 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 09:49:51,310 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 09:49:51,311 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-10-28 09:49:51,311 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-10-28 09:49:51,311 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-10-28 09:49:51,311 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 09:49:51,312 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-10-28 09:49:51,312 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 09:49:51,312 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-10-28 09:49:51,312 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 09:49:51,313 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 09:49:51,313 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 09:49:51,313 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 09:49:51,314 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 09:49:51,315 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-10-28 09:49:51,316 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_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0671ae6ff503095cbeea151b096da898df643465964474a4f3e3c55275f454c [2021-10-28 09:49:51,648 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 09:49:51,684 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 09:49:51,688 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 09:49:51,691 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 09:49:51,693 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 09:49:51,694 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/termination-crafted/NonTermination3-2.c [2021-10-28 09:49:51,816 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/data/0726789e0/eb7fc45b72b14de39b0be669f34e1485/FLAGa8c104ede [2021-10-28 09:49:52,508 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 09:49:52,509 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/sv-benchmarks/c/termination-crafted/NonTermination3-2.c [2021-10-28 09:49:52,525 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/data/0726789e0/eb7fc45b72b14de39b0be669f34e1485/FLAGa8c104ede [2021-10-28 09:49:52,868 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/data/0726789e0/eb7fc45b72b14de39b0be669f34e1485 [2021-10-28 09:49:52,874 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 09:49:52,877 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 09:49:52,881 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 09:49:52,881 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 09:49:52,887 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 09:49:52,888 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:49:52" (1/1) ... [2021-10-28 09:49:52,890 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b282ee4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:49:52, skipping insertion in model container [2021-10-28 09:49:52,891 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:49:52" (1/1) ... [2021-10-28 09:49:52,901 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 09:49:52,921 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 09:49:53,249 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:49:53,256 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 09:49:53,288 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:49:53,315 INFO L208 MainTranslator]: Completed translation [2021-10-28 09:49:53,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:49:53 WrapperNode [2021-10-28 09:49:53,316 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 09:49:53,318 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 09:49:53,318 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 09:49:53,319 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 09:49:53,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:49:53" (1/1) ... [2021-10-28 09:49:53,342 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:49:53" (1/1) ... [2021-10-28 09:49:53,370 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 09:49:53,372 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 09:49:53,372 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 09:49:53,372 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 09:49:53,382 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:49:53" (1/1) ... [2021-10-28 09:49:53,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:49:53" (1/1) ... [2021-10-28 09:49:53,398 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:49:53" (1/1) ... [2021-10-28 09:49:53,399 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:49:53" (1/1) ... [2021-10-28 09:49:53,404 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:49:53" (1/1) ... [2021-10-28 09:49:53,412 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:49:53" (1/1) ... [2021-10-28 09:49:53,419 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:49:53" (1/1) ... [2021-10-28 09:49:53,427 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 09:49:53,430 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 09:49:53,431 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 09:49:53,432 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 09:49:53,433 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:49:53" (1/1) ... [2021-10-28 09:49:53,446 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:49:53,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:53,481 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:49:53,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-10-28 09:49:53,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 09:49:53,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 09:49:53,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 09:49:53,547 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 09:49:53,548 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 09:49:53,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 09:49:53,862 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 09:49:53,879 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-28 09:49:53,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:49:53 BoogieIcfgContainer [2021-10-28 09:49:53,882 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 09:49:53,883 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-10-28 09:49:53,883 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-10-28 09:49:53,888 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-10-28 09:49:53,889 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-28 09:49:53,889 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.10 09:49:52" (1/3) ... [2021-10-28 09:49:53,900 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5991334 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.10 09:49:53, skipping insertion in model container [2021-10-28 09:49:53,900 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-28 09:49:53,901 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:49:53" (2/3) ... [2021-10-28 09:49:53,901 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5991334 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.10 09:49:53, skipping insertion in model container [2021-10-28 09:49:53,901 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-28 09:49:53,902 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:49:53" (3/3) ... [2021-10-28 09:49:53,903 INFO L389 chiAutomizerObserver]: Analyzing ICFG NonTermination3-2.c [2021-10-28 09:49:53,973 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-10-28 09:49:53,974 INFO L360 BuchiCegarLoop]: Hoare is false [2021-10-28 09:49:53,974 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-10-28 09:49:53,974 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-28 09:49:53,974 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-28 09:49:53,975 INFO L364 BuchiCegarLoop]: Difference is false [2021-10-28 09:49:53,975 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-28 09:49:53,975 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-10-28 09:49:53,999 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:49:54,025 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 5 [2021-10-28 09:49:54,026 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:49:54,026 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:49:54,034 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-28 09:49:54,034 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-10-28 09:49:54,034 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-10-28 09:49:54,035 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:49:54,037 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 5 [2021-10-28 09:49:54,037 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:49:54,037 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:49:54,038 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-28 09:49:54,038 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-10-28 09:49:54,048 INFO L791 eck$LassoCheckResult]: Stem: 6#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 10#L-1true havoc main_#res;havoc main_#t~nondet0, main_#t~nondet2, main_#t~pre1, main_~n~0, main_#t~nondet5, main_#t~mem3, main_#t~short4, main_~i~0, main_~#a~0.base, main_~#a~0.offset;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;call main_~#a~0.base, main_~#a~0.offset := #Ultimate.allocOnStack(40);main_~n~0 := 0; 9#L13-3true [2021-10-28 09:49:54,049 INFO L793 eck$LassoCheckResult]: Loop: 9#L13-3true assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 8#L13-2true main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 9#L13-3true [2021-10-28 09:49:54,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:54,064 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2021-10-28 09:49:54,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:54,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277712579] [2021-10-28 09:49:54,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:54,078 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:54,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:49:54,219 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:49:54,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:49:54,278 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:49:54,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:54,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1283, now seen corresponding path program 1 times [2021-10-28 09:49:54,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:54,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784149393] [2021-10-28 09:49:54,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:54,293 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:54,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:49:54,303 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:49:54,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:49:54,315 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:49:54,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:54,317 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2021-10-28 09:49:54,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:54,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435575897] [2021-10-28 09:49:54,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:54,319 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:54,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:49:54,342 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:49:54,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:49:54,364 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:49:54,640 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:49:54,641 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:49:54,641 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:49:54,642 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:49:54,642 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 09:49:54,642 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:49:54,642 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:49:54,643 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:49:54,643 INFO L133 ssoRankerPreferences]: Filename of dumped script: NonTermination3-2.c_Iteration1_Lasso [2021-10-28 09:49:54,643 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:49:54,644 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:49:54,669 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 09:49:54,677 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 09:49:54,680 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 09:49:54,683 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 09:49:54,686 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 09:49:54,691 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 09:49:54,694 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 09:49:54,745 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 09:49:54,748 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 09:49:54,751 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 09:49:54,920 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:49:54,925 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 09:49:54,928 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:49:54,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:54,930 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:49:54,956 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 09:49:54,970 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:49:54,970 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:49:54,971 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:49:54,971 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:49:54,971 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:49:54,973 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:49:54,974 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:49:54,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-10-28 09:49:55,000 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:49:55,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-10-28 09:49:55,045 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:49:55,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:55,047 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:49:55,054 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 09:49:55,066 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:49:55,066 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:49:55,067 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:49:55,067 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:49:55,067 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:49:55,068 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:49:55,068 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:49:55,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-10-28 09:49:55,087 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:49:55,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-10-28 09:49:55,133 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:49:55,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:55,134 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:49:55,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-10-28 09:49:55,145 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 09:49:55,156 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:49:55,156 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:49:55,156 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:49:55,157 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:49:55,157 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:49:55,158 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:49:55,158 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:49:55,179 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:49:55,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-10-28 09:49:55,212 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:49:55,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:55,218 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:49:55,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-10-28 09:49:55,224 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 09:49:55,233 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:49:55,233 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:49:55,233 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:49:55,234 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:49:55,234 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:49:55,235 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:49:55,235 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:49:55,276 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:49:55,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Ended with exit code 0 [2021-10-28 09:49:55,305 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:49:55,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:55,308 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:49:55,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-10-28 09:49:55,310 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 09:49:55,319 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:49:55,320 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:49:55,320 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:49:55,320 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:49:55,324 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 09:49:55,325 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 09:49:55,351 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:49:55,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-10-28 09:49:55,379 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:49:55,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:55,381 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:49:55,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-10-28 09:49:55,408 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 09:49:55,417 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:49:55,417 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:49:55,417 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:49:55,417 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:49:55,418 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:49:55,418 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:49:55,419 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:49:55,423 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:49:55,451 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Ended with exit code 0 [2021-10-28 09:49:55,452 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:49:55,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:55,453 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:49:55,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-10-28 09:49:55,456 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 09:49:55,465 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:49:55,466 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:49:55,466 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:49:55,466 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:49:55,471 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 09:49:55,471 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 09:49:55,522 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:49:55,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-10-28 09:49:55,547 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:49:55,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:55,549 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:49:55,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-10-28 09:49:55,551 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 09:49:55,560 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:49:55,561 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:49:55,561 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:49:55,561 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:49:55,566 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 09:49:55,566 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 09:49:55,580 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:49:55,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-10-28 09:49:55,611 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:49:55,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:55,612 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:49:55,616 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 09:49:55,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-10-28 09:49:55,625 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:49:55,625 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:49:55,626 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:49:55,626 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:49:55,634 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 09:49:55,634 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 09:49:55,654 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:49:55,679 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Ended with exit code 0 [2021-10-28 09:49:55,679 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:49:55,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:55,681 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:49:55,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-10-28 09:49:55,684 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 09:49:55,699 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:49:55,699 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:49:55,699 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:49:55,700 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:49:55,700 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:49:55,701 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:49:55,701 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:49:55,727 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:49:55,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-10-28 09:49:55,768 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:49:55,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:55,770 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:49:55,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-10-28 09:49:55,776 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 09:49:55,785 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:49:55,785 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:49:55,786 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:49:55,786 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:49:55,786 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:49:55,786 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:49:55,786 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:49:55,788 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:49:55,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-10-28 09:49:55,816 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:49:55,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:55,818 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:49:55,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-10-28 09:49:55,823 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 09:49:55,833 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:49:55,833 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:49:55,833 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:49:55,833 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:49:55,849 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 09:49:55,850 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 09:49:55,902 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 09:49:55,944 INFO L443 ModelExtractionUtils]: Simplification made 12 calls to the SMT solver. [2021-10-28 09:49:55,944 INFO L444 ModelExtractionUtils]: 0 out of 13 variables were initially zero. Simplification set additionally 10 variables to zero. [2021-10-28 09:49:55,946 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:49:55,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:55,952 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:49:55,955 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 09:49:55,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-10-28 09:49:55,978 INFO L438 nArgumentSynthesizer]: Removed 2 redundant supporting invariants from a total of 2. [2021-10-28 09:49:55,979 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 09:49:55,979 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~n~0, v_rep(select #length ULTIMATE.start_main_~#a~0.base)_1) = -8*ULTIMATE.start_main_~n~0 + 19*v_rep(select #length ULTIMATE.start_main_~#a~0.base)_1 Supporting invariants [] [2021-10-28 09:49:56,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-10-28 09:49:56,027 INFO L297 tatePredicateManager]: 1 out of 1 supporting invariants were superfluous and have been removed [2021-10-28 09:49:56,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:56,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:56,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 09:49:56,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:49:56,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:56,107 WARN L261 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 09:49:56,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:49:56,188 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 09:49:56,209 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-10-28 09:49:56,211 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 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 09:49:56,289 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0). Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 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) Result 25 states and 37 transitions. Complement of second has 8 states. [2021-10-28 09:49:56,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-10-28 09:49:56,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 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 09:49:56,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 21 transitions. [2021-10-28 09:49:56,294 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 2 letters. Loop has 2 letters. [2021-10-28 09:49:56,295 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:49:56,295 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 4 letters. Loop has 2 letters. [2021-10-28 09:49:56,295 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:49:56,296 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 2 letters. Loop has 4 letters. [2021-10-28 09:49:56,296 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:49:56,297 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 37 transitions. [2021-10-28 09:49:56,300 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-28 09:49:56,304 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 9 states and 12 transitions. [2021-10-28 09:49:56,306 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2021-10-28 09:49:56,306 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2021-10-28 09:49:56,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 12 transitions. [2021-10-28 09:49:56,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:49:56,308 INFO L681 BuchiCegarLoop]: Abstraction has 9 states and 12 transitions. [2021-10-28 09:49:56,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 12 transitions. [2021-10-28 09:49:56,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2021-10-28 09:49:56,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 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 09:49:56,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 11 transitions. [2021-10-28 09:49:56,338 INFO L704 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2021-10-28 09:49:56,338 INFO L587 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2021-10-28 09:49:56,338 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-10-28 09:49:56,339 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states and 11 transitions. [2021-10-28 09:49:56,339 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-28 09:49:56,339 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:49:56,340 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:49:56,340 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-10-28 09:49:56,340 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-28 09:49:56,341 INFO L791 eck$LassoCheckResult]: Stem: 83#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 84#L-1 havoc main_#res;havoc main_#t~nondet0, main_#t~nondet2, main_#t~pre1, main_~n~0, main_#t~nondet5, main_#t~mem3, main_#t~short4, main_~i~0, main_~#a~0.base, main_~#a~0.offset;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;call main_~#a~0.base, main_~#a~0.offset := #Ultimate.allocOnStack(40);main_~n~0 := 0; 87#L13-3 assume !(main_~n~0 < 10); 82#L17-4 [2021-10-28 09:49:56,341 INFO L793 eck$LassoCheckResult]: Loop: 82#L17-4 main_#t~short4 := 0 <= main_~i~0 && main_~i~0 < 10; 80#L17 assume main_#t~short4;call main_#t~mem3 := read~int(main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4);main_#t~short4 := main_#t~mem3 >= 0; 81#L17-2 assume !!main_#t~short4;havoc main_#t~mem3;havoc main_#t~short4;call write~int(0, main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4);main_~i~0 := main_#t~nondet5;havoc main_#t~nondet5; 82#L17-4 [2021-10-28 09:49:56,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:56,342 INFO L85 PathProgramCache]: Analyzing trace with hash 29861, now seen corresponding path program 1 times [2021-10-28 09:49:56,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:56,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730431076] [2021-10-28 09:49:56,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:56,343 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:56,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:56,414 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 09:49:56,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:49:56,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730431076] [2021-10-28 09:49:56,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730431076] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:49:56,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:49:56,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-28 09:49:56,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866597472] [2021-10-28 09:49:56,420 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:49:56,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:56,421 INFO L85 PathProgramCache]: Analyzing trace with hash 48762, now seen corresponding path program 1 times [2021-10-28 09:49:56,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:56,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016375421] [2021-10-28 09:49:56,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:56,423 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:56,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:49:56,442 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:49:56,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:49:56,460 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:49:56,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:49:56,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:49:56,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:49:56,667 INFO L87 Difference]: Start difference. First operand 8 states and 11 transitions. cyclomatic complexity: 5 Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 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 09:49:56,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:49:56,684 INFO L93 Difference]: Finished difference Result 9 states and 11 transitions. [2021-10-28 09:49:56,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:49:56,685 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 9 states and 11 transitions. [2021-10-28 09:49:56,687 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-28 09:49:56,688 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 9 states to 9 states and 11 transitions. [2021-10-28 09:49:56,688 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2021-10-28 09:49:56,689 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2021-10-28 09:49:56,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 11 transitions. [2021-10-28 09:49:56,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:49:56,689 INFO L681 BuchiCegarLoop]: Abstraction has 9 states and 11 transitions. [2021-10-28 09:49:56,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 11 transitions. [2021-10-28 09:49:56,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2021-10-28 09:49:56,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 8 states have (on average 1.25) 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 09:49:56,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2021-10-28 09:49:56,693 INFO L704 BuchiCegarLoop]: Abstraction has 8 states and 10 transitions. [2021-10-28 09:49:56,693 INFO L587 BuchiCegarLoop]: Abstraction has 8 states and 10 transitions. [2021-10-28 09:49:56,693 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-10-28 09:49:56,693 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states and 10 transitions. [2021-10-28 09:49:56,695 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-28 09:49:56,695 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:49:56,695 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:49:56,696 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2021-10-28 09:49:56,696 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-28 09:49:56,696 INFO L791 eck$LassoCheckResult]: Stem: 106#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 107#L-1 havoc main_#res;havoc main_#t~nondet0, main_#t~nondet2, main_#t~pre1, main_~n~0, main_#t~nondet5, main_#t~mem3, main_#t~short4, main_~i~0, main_~#a~0.base, main_~#a~0.offset;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;call main_~#a~0.base, main_~#a~0.offset := #Ultimate.allocOnStack(40);main_~n~0 := 0; 110#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 108#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 109#L13-3 assume !(main_~n~0 < 10); 105#L17-4 [2021-10-28 09:49:56,697 INFO L793 eck$LassoCheckResult]: Loop: 105#L17-4 main_#t~short4 := 0 <= main_~i~0 && main_~i~0 < 10; 103#L17 assume main_#t~short4;call main_#t~mem3 := read~int(main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4);main_#t~short4 := main_#t~mem3 >= 0; 104#L17-2 assume !!main_#t~short4;havoc main_#t~mem3;havoc main_#t~short4;call write~int(0, main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4);main_~i~0 := main_#t~nondet5;havoc main_#t~nondet5; 105#L17-4 [2021-10-28 09:49:56,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:56,699 INFO L85 PathProgramCache]: Analyzing trace with hash 28698723, now seen corresponding path program 1 times [2021-10-28 09:49:56,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:56,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196326255] [2021-10-28 09:49:56,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:56,700 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:56,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:56,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:49:56,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:49:56,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196326255] [2021-10-28 09:49:56,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196326255] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:56,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187185032] [2021-10-28 09:49:56,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:56,767 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:49:56,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:56,769 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:49:56,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 09:49:56,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:56,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 09:49:56,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:49:56,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:49:56,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187185032] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:56,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:49:56,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-10-28 09:49:56,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176462020] [2021-10-28 09:49:56,856 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:49:56,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:56,857 INFO L85 PathProgramCache]: Analyzing trace with hash 48762, now seen corresponding path program 2 times [2021-10-28 09:49:56,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:56,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036190175] [2021-10-28 09:49:56,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:56,858 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:56,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:49:56,866 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:49:56,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:49:56,885 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:49:57,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:49:57,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:49:57,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:49:57,043 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. cyclomatic complexity: 4 Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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 09:49:57,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:49:57,066 INFO L93 Difference]: Finished difference Result 11 states and 13 transitions. [2021-10-28 09:49:57,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:49:57,067 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 13 transitions. [2021-10-28 09:49:57,069 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-28 09:49:57,071 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 11 states and 13 transitions. [2021-10-28 09:49:57,071 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2021-10-28 09:49:57,071 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2021-10-28 09:49:57,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 13 transitions. [2021-10-28 09:49:57,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:49:57,072 INFO L681 BuchiCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-10-28 09:49:57,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 13 transitions. [2021-10-28 09:49:57,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2021-10-28 09:49:57,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 10 states have (on average 1.2) internal successors, (12), 9 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 09:49:57,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-10-28 09:49:57,076 INFO L704 BuchiCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-10-28 09:49:57,076 INFO L587 BuchiCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-10-28 09:49:57,077 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-10-28 09:49:57,077 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 10 states and 12 transitions. [2021-10-28 09:49:57,080 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-28 09:49:57,080 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:49:57,080 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:49:57,082 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1] [2021-10-28 09:49:57,083 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-28 09:49:57,083 INFO L791 eck$LassoCheckResult]: Stem: 145#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 146#L-1 havoc main_#res;havoc main_#t~nondet0, main_#t~nondet2, main_#t~pre1, main_~n~0, main_#t~nondet5, main_#t~mem3, main_#t~short4, main_~i~0, main_~#a~0.base, main_~#a~0.offset;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;call main_~#a~0.base, main_~#a~0.offset := #Ultimate.allocOnStack(40);main_~n~0 := 0; 149#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 147#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 148#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 150#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 151#L13-3 assume !(main_~n~0 < 10); 144#L17-4 [2021-10-28 09:49:57,084 INFO L793 eck$LassoCheckResult]: Loop: 144#L17-4 main_#t~short4 := 0 <= main_~i~0 && main_~i~0 < 10; 142#L17 assume main_#t~short4;call main_#t~mem3 := read~int(main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4);main_#t~short4 := main_#t~mem3 >= 0; 143#L17-2 assume !!main_#t~short4;havoc main_#t~mem3;havoc main_#t~short4;call write~int(0, main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4);main_~i~0 := main_#t~nondet5;havoc main_#t~nondet5; 144#L17-4 [2021-10-28 09:49:57,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:57,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1809671329, now seen corresponding path program 2 times [2021-10-28 09:49:57,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:57,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371194706] [2021-10-28 09:49:57,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:57,086 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:57,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:57,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:49:57,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:49:57,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371194706] [2021-10-28 09:49:57,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371194706] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:57,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642792935] [2021-10-28 09:49:57,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:49:57,188 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:49:57,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:57,221 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:49:57,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 09:49:57,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:49:57,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:49:57,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 09:49:57,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:49:57,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:49:57,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642792935] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:57,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:49:57,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-28 09:49:57,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091708407] [2021-10-28 09:49:57,323 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:49:57,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:57,324 INFO L85 PathProgramCache]: Analyzing trace with hash 48762, now seen corresponding path program 3 times [2021-10-28 09:49:57,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:57,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673239647] [2021-10-28 09:49:57,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:57,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:57,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:49:57,346 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:49:57,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:49:57,371 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:49:57,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:49:57,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:49:57,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:49:57,536 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. cyclomatic complexity: 4 Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 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 09:49:57,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:49:57,565 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-10-28 09:49:57,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:49:57,566 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 15 transitions. [2021-10-28 09:49:57,567 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-28 09:49:57,568 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 13 states and 15 transitions. [2021-10-28 09:49:57,568 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2021-10-28 09:49:57,569 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2021-10-28 09:49:57,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 15 transitions. [2021-10-28 09:49:57,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:49:57,569 INFO L681 BuchiCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-10-28 09:49:57,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 15 transitions. [2021-10-28 09:49:57,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2021-10-28 09:49:57,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 11 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 09:49:57,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-10-28 09:49:57,581 INFO L704 BuchiCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-10-28 09:49:57,581 INFO L587 BuchiCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-10-28 09:49:57,581 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-10-28 09:49:57,581 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 14 transitions. [2021-10-28 09:49:57,582 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-28 09:49:57,582 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:49:57,582 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:49:57,583 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [3, 3, 1, 1, 1] [2021-10-28 09:49:57,583 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-28 09:49:57,583 INFO L791 eck$LassoCheckResult]: Stem: 195#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 196#L-1 havoc main_#res;havoc main_#t~nondet0, main_#t~nondet2, main_#t~pre1, main_~n~0, main_#t~nondet5, main_#t~mem3, main_#t~short4, main_~i~0, main_~#a~0.base, main_~#a~0.offset;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;call main_~#a~0.base, main_~#a~0.offset := #Ultimate.allocOnStack(40);main_~n~0 := 0; 199#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 197#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 198#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 200#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 203#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 202#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 201#L13-3 assume !(main_~n~0 < 10); 194#L17-4 [2021-10-28 09:49:57,583 INFO L793 eck$LassoCheckResult]: Loop: 194#L17-4 main_#t~short4 := 0 <= main_~i~0 && main_~i~0 < 10; 192#L17 assume main_#t~short4;call main_#t~mem3 := read~int(main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4);main_#t~short4 := main_#t~mem3 >= 0; 193#L17-2 assume !!main_#t~short4;havoc main_#t~mem3;havoc main_#t~short4;call write~int(0, main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4);main_~i~0 := main_#t~nondet5;havoc main_#t~nondet5; 194#L17-4 [2021-10-28 09:49:57,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:57,584 INFO L85 PathProgramCache]: Analyzing trace with hash -367605409, now seen corresponding path program 3 times [2021-10-28 09:49:57,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:57,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072738418] [2021-10-28 09:49:57,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:57,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:57,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:57,643 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:49:57,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:49:57,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072738418] [2021-10-28 09:49:57,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072738418] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:57,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843766196] [2021-10-28 09:49:57,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:49:57,649 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:49:57,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:57,653 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:49:57,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 09:49:57,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-28 09:49:57,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:49:57,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 09:49:57,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:49:57,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:49:57,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843766196] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:57,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:49:57,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-10-28 09:49:57,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257882806] [2021-10-28 09:49:57,765 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:49:57,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:57,765 INFO L85 PathProgramCache]: Analyzing trace with hash 48762, now seen corresponding path program 4 times [2021-10-28 09:49:57,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:57,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251291338] [2021-10-28 09:49:57,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:57,766 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:57,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:49:57,773 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:49:57,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:49:57,780 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:49:57,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:49:57,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:49:57,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:49:57,971 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. cyclomatic complexity: 4 Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 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 09:49:58,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:49:58,024 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2021-10-28 09:49:58,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:49:58,024 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 15 states and 17 transitions. [2021-10-28 09:49:58,025 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-28 09:49:58,026 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 15 states to 15 states and 17 transitions. [2021-10-28 09:49:58,026 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2021-10-28 09:49:58,026 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2021-10-28 09:49:58,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 17 transitions. [2021-10-28 09:49:58,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:49:58,026 INFO L681 BuchiCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-10-28 09:49:58,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states and 17 transitions. [2021-10-28 09:49:58,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-10-28 09:49:58,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 13 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 09:49:58,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-10-28 09:49:58,028 INFO L704 BuchiCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-10-28 09:49:58,029 INFO L587 BuchiCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-10-28 09:49:58,029 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-10-28 09:49:58,029 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states and 16 transitions. [2021-10-28 09:49:58,029 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-28 09:49:58,029 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:49:58,030 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:49:58,030 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [4, 4, 1, 1, 1] [2021-10-28 09:49:58,030 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-28 09:49:58,030 INFO L791 eck$LassoCheckResult]: Stem: 256#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 257#L-1 havoc main_#res;havoc main_#t~nondet0, main_#t~nondet2, main_#t~pre1, main_~n~0, main_#t~nondet5, main_#t~mem3, main_#t~short4, main_~i~0, main_~#a~0.base, main_~#a~0.offset;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;call main_~#a~0.base, main_~#a~0.offset := #Ultimate.allocOnStack(40);main_~n~0 := 0; 260#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 261#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 262#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 258#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 259#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 266#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 265#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 264#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 263#L13-3 assume !(main_~n~0 < 10); 255#L17-4 [2021-10-28 09:49:58,031 INFO L793 eck$LassoCheckResult]: Loop: 255#L17-4 main_#t~short4 := 0 <= main_~i~0 && main_~i~0 < 10; 253#L17 assume main_#t~short4;call main_#t~mem3 := read~int(main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4);main_#t~short4 := main_#t~mem3 >= 0; 254#L17-2 assume !!main_#t~short4;havoc main_#t~mem3;havoc main_#t~short4;call write~int(0, main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4);main_~i~0 := main_#t~nondet5;havoc main_#t~nondet5; 255#L17-4 [2021-10-28 09:49:58,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:58,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1081477475, now seen corresponding path program 4 times [2021-10-28 09:49:58,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:58,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027034347] [2021-10-28 09:49:58,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:58,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:58,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:58,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2021-10-28 09:49:58,103 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:49:58,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:49:58,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027034347] [2021-10-28 09:49:58,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027034347] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:58,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129387447] [2021-10-28 09:49:58,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:49:58,104 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:49:58,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:58,106 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:49:58,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-28 09:49:58,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:49:58,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:49:58,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 09:49:58,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:49:58,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:49:58,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129387447] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:58,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:49:58,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-10-28 09:49:58,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937717488] [2021-10-28 09:49:58,236 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:49:58,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:58,237 INFO L85 PathProgramCache]: Analyzing trace with hash 48762, now seen corresponding path program 5 times [2021-10-28 09:49:58,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:58,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772581792] [2021-10-28 09:49:58,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:58,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:58,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:49:58,248 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:49:58,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:49:58,264 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:49:58,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:49:58,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:49:58,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:49:58,392 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. cyclomatic complexity: 4 Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 8 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 09:49:58,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:49:58,419 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2021-10-28 09:49:58,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:49:58,420 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 17 states and 19 transitions. [2021-10-28 09:49:58,421 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-28 09:49:58,421 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 17 states to 17 states and 19 transitions. [2021-10-28 09:49:58,422 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2021-10-28 09:49:58,422 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2021-10-28 09:49:58,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 19 transitions. [2021-10-28 09:49:58,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:49:58,422 INFO L681 BuchiCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-10-28 09:49:58,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states and 19 transitions. [2021-10-28 09:49:58,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-10-28 09:49:58,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 16 states have (on average 1.125) internal successors, (18), 15 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 09:49:58,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-10-28 09:49:58,425 INFO L704 BuchiCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-10-28 09:49:58,425 INFO L587 BuchiCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-10-28 09:49:58,425 INFO L425 BuchiCegarLoop]: ======== Iteration 7============ [2021-10-28 09:49:58,426 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states and 18 transitions. [2021-10-28 09:49:58,426 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-28 09:49:58,426 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:49:58,427 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:49:58,427 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [5, 5, 1, 1, 1] [2021-10-28 09:49:58,427 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-28 09:49:58,428 INFO L791 eck$LassoCheckResult]: Stem: 328#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 329#L-1 havoc main_#res;havoc main_#t~nondet0, main_#t~nondet2, main_#t~pre1, main_~n~0, main_#t~nondet5, main_#t~mem3, main_#t~short4, main_~i~0, main_~#a~0.base, main_~#a~0.offset;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;call main_~#a~0.base, main_~#a~0.offset := #Ultimate.allocOnStack(40);main_~n~0 := 0; 332#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 333#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 334#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 330#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 331#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 340#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 339#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 338#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 337#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 336#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 335#L13-3 assume !(main_~n~0 < 10); 327#L17-4 [2021-10-28 09:49:58,428 INFO L793 eck$LassoCheckResult]: Loop: 327#L17-4 main_#t~short4 := 0 <= main_~i~0 && main_~i~0 < 10; 325#L17 assume main_#t~short4;call main_#t~mem3 := read~int(main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4);main_#t~short4 := main_#t~mem3 >= 0; 326#L17-2 assume !!main_#t~short4;havoc main_#t~mem3;havoc main_#t~short4;call write~int(0, main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4);main_~i~0 := main_#t~nondet5;havoc main_#t~nondet5; 327#L17-4 [2021-10-28 09:49:58,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:58,428 INFO L85 PathProgramCache]: Analyzing trace with hash 82234459, now seen corresponding path program 5 times [2021-10-28 09:49:58,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:58,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989700705] [2021-10-28 09:49:58,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:58,429 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:58,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:58,500 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:49:58,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:49:58,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989700705] [2021-10-28 09:49:58,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989700705] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:58,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977734398] [2021-10-28 09:49:58,501 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:49:58,502 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:49:58,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:58,509 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:49:58,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 09:49:58,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-28 09:49:58,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:49:58,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:49:58,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:49:58,653 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:49:58,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977734398] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:58,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:49:58,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-10-28 09:49:58,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418922289] [2021-10-28 09:49:58,655 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:49:58,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:58,655 INFO L85 PathProgramCache]: Analyzing trace with hash 48762, now seen corresponding path program 6 times [2021-10-28 09:49:58,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:58,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237676231] [2021-10-28 09:49:58,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:58,656 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:58,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:49:58,662 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:49:58,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:49:58,667 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:49:58,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:49:58,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 09:49:58,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:49:58,790 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. cyclomatic complexity: 4 Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 9 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 09:49:58,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:49:58,822 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-10-28 09:49:58,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 09:49:58,823 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 19 states and 21 transitions. [2021-10-28 09:49:58,824 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-28 09:49:58,824 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 19 states to 19 states and 21 transitions. [2021-10-28 09:49:58,824 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2021-10-28 09:49:58,825 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2021-10-28 09:49:58,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 21 transitions. [2021-10-28 09:49:58,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:49:58,825 INFO L681 BuchiCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-10-28 09:49:58,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states and 21 transitions. [2021-10-28 09:49:58,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-10-28 09:49:58,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 17 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 09:49:58,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-10-28 09:49:58,828 INFO L704 BuchiCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-10-28 09:49:58,828 INFO L587 BuchiCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-10-28 09:49:58,829 INFO L425 BuchiCegarLoop]: ======== Iteration 8============ [2021-10-28 09:49:58,829 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 18 states and 20 transitions. [2021-10-28 09:49:58,829 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-28 09:49:58,830 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:49:58,830 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:49:58,830 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 1, 1, 1] [2021-10-28 09:49:58,831 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-28 09:49:58,831 INFO L791 eck$LassoCheckResult]: Stem: 411#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 412#L-1 havoc main_#res;havoc main_#t~nondet0, main_#t~nondet2, main_#t~pre1, main_~n~0, main_#t~nondet5, main_#t~mem3, main_#t~short4, main_~i~0, main_~#a~0.base, main_~#a~0.offset;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;call main_~#a~0.base, main_~#a~0.offset := #Ultimate.allocOnStack(40);main_~n~0 := 0; 415#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 416#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 417#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 413#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 414#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 425#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 424#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 423#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 422#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 421#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 420#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 419#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 418#L13-3 assume !(main_~n~0 < 10); 410#L17-4 [2021-10-28 09:49:58,831 INFO L793 eck$LassoCheckResult]: Loop: 410#L17-4 main_#t~short4 := 0 <= main_~i~0 && main_~i~0 < 10; 408#L17 assume main_#t~short4;call main_#t~mem3 := read~int(main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4);main_#t~short4 := main_#t~mem3 >= 0; 409#L17-2 assume !!main_#t~short4;havoc main_#t~mem3;havoc main_#t~short4;call write~int(0, main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4);main_~i~0 := main_#t~nondet5;havoc main_#t~nondet5; 410#L17-4 [2021-10-28 09:49:58,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:58,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1717906073, now seen corresponding path program 6 times [2021-10-28 09:49:58,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:58,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156101804] [2021-10-28 09:49:58,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:58,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:58,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:58,918 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:49:58,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:49:58,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156101804] [2021-10-28 09:49:58,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156101804] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:58,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361059153] [2021-10-28 09:49:58,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:49:58,920 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:49:58,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:58,927 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:49:58,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-28 09:49:59,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-28 09:49:59,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:49:59,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 09:49:59,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:49:59,120 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:49:59,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361059153] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:59,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:49:59,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-10-28 09:49:59,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914648922] [2021-10-28 09:49:59,121 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:49:59,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:59,124 INFO L85 PathProgramCache]: Analyzing trace with hash 48762, now seen corresponding path program 7 times [2021-10-28 09:49:59,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:59,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700549355] [2021-10-28 09:49:59,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:59,125 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:59,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:49:59,141 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:49:59,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:49:59,156 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:49:59,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:49:59,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 09:49:59,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:49:59,281 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. cyclomatic complexity: 4 Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 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 09:49:59,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:49:59,316 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2021-10-28 09:49:59,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:49:59,317 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 21 states and 23 transitions. [2021-10-28 09:49:59,318 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-28 09:49:59,318 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 21 states to 21 states and 23 transitions. [2021-10-28 09:49:59,318 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2021-10-28 09:49:59,319 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2021-10-28 09:49:59,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 23 transitions. [2021-10-28 09:49:59,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:49:59,319 INFO L681 BuchiCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-10-28 09:49:59,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states and 23 transitions. [2021-10-28 09:49:59,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-10-28 09:49:59,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 20 states have (on average 1.1) internal successors, (22), 19 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 09:49:59,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-10-28 09:49:59,322 INFO L704 BuchiCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-10-28 09:49:59,322 INFO L587 BuchiCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-10-28 09:49:59,322 INFO L425 BuchiCegarLoop]: ======== Iteration 9============ [2021-10-28 09:49:59,323 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 22 transitions. [2021-10-28 09:49:59,323 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-28 09:49:59,324 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:49:59,324 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:49:59,324 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [7, 7, 1, 1, 1] [2021-10-28 09:49:59,325 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-28 09:49:59,325 INFO L791 eck$LassoCheckResult]: Stem: 505#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 506#L-1 havoc main_#res;havoc main_#t~nondet0, main_#t~nondet2, main_#t~pre1, main_~n~0, main_#t~nondet5, main_#t~mem3, main_#t~short4, main_~i~0, main_~#a~0.base, main_~#a~0.offset;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;call main_~#a~0.base, main_~#a~0.offset := #Ultimate.allocOnStack(40);main_~n~0 := 0; 509#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 510#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 511#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 507#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 508#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 521#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 520#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 519#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 518#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 517#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 516#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 515#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 514#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 513#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 512#L13-3 assume !(main_~n~0 < 10); 504#L17-4 [2021-10-28 09:49:59,325 INFO L793 eck$LassoCheckResult]: Loop: 504#L17-4 main_#t~short4 := 0 <= main_~i~0 && main_~i~0 < 10; 502#L17 assume main_#t~short4;call main_#t~mem3 := read~int(main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4);main_#t~short4 := main_#t~mem3 >= 0; 503#L17-2 assume !!main_#t~short4;havoc main_#t~mem3;havoc main_#t~short4;call write~int(0, main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4);main_~i~0 := main_#t~nondet5;havoc main_#t~nondet5; 504#L17-4 [2021-10-28 09:49:59,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:59,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1640296791, now seen corresponding path program 7 times [2021-10-28 09:49:59,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:59,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723255941] [2021-10-28 09:49:59,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:59,327 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:59,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:59,441 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:49:59,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:49:59,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723255941] [2021-10-28 09:49:59,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723255941] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:59,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565123214] [2021-10-28 09:49:59,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:49:59,443 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:49:59,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:59,445 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:49:59,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-28 09:49:59,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:59,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 09:49:59,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:49:59,622 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:49:59,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565123214] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:59,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:49:59,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-10-28 09:49:59,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848819971] [2021-10-28 09:49:59,623 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:49:59,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:59,624 INFO L85 PathProgramCache]: Analyzing trace with hash 48762, now seen corresponding path program 8 times [2021-10-28 09:49:59,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:59,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693350247] [2021-10-28 09:49:59,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:59,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:59,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:49:59,631 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:49:59,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:49:59,637 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:49:59,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:49:59,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 09:49:59,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:49:59,759 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. cyclomatic complexity: 4 Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 11 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 09:49:59,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:49:59,805 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-10-28 09:49:59,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 09:49:59,805 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 23 states and 25 transitions. [2021-10-28 09:49:59,806 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-28 09:49:59,807 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 23 states to 23 states and 25 transitions. [2021-10-28 09:49:59,807 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2021-10-28 09:49:59,807 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2021-10-28 09:49:59,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 25 transitions. [2021-10-28 09:49:59,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:49:59,808 INFO L681 BuchiCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-10-28 09:49:59,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 25 transitions. [2021-10-28 09:49:59,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-10-28 09:49:59,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 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 09:49:59,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-10-28 09:49:59,810 INFO L704 BuchiCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-10-28 09:49:59,811 INFO L587 BuchiCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-10-28 09:49:59,811 INFO L425 BuchiCegarLoop]: ======== Iteration 10============ [2021-10-28 09:49:59,811 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states and 24 transitions. [2021-10-28 09:49:59,811 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-28 09:49:59,812 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:49:59,812 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:49:59,813 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [8, 8, 1, 1, 1] [2021-10-28 09:49:59,813 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-28 09:49:59,813 INFO L791 eck$LassoCheckResult]: Stem: 610#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 611#L-1 havoc main_#res;havoc main_#t~nondet0, main_#t~nondet2, main_#t~pre1, main_~n~0, main_#t~nondet5, main_#t~mem3, main_#t~short4, main_~i~0, main_~#a~0.base, main_~#a~0.offset;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;call main_~#a~0.base, main_~#a~0.offset := #Ultimate.allocOnStack(40);main_~n~0 := 0; 614#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 615#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 616#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 612#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 613#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 628#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 627#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 626#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 625#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 624#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 623#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 622#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 621#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 620#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 619#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 618#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 617#L13-3 assume !(main_~n~0 < 10); 609#L17-4 [2021-10-28 09:49:59,813 INFO L793 eck$LassoCheckResult]: Loop: 609#L17-4 main_#t~short4 := 0 <= main_~i~0 && main_~i~0 < 10; 607#L17 assume main_#t~short4;call main_#t~mem3 := read~int(main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4);main_#t~short4 := main_#t~mem3 >= 0; 608#L17-2 assume !!main_#t~short4;havoc main_#t~mem3;havoc main_#t~short4;call write~int(0, main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4);main_~i~0 := main_#t~nondet5;havoc main_#t~nondet5; 609#L17-4 [2021-10-28 09:49:59,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:59,814 INFO L85 PathProgramCache]: Analyzing trace with hash 72220821, now seen corresponding path program 8 times [2021-10-28 09:49:59,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:59,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729880625] [2021-10-28 09:49:59,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:59,815 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:59,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:59,922 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:49:59,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:49:59,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729880625] [2021-10-28 09:49:59,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729880625] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:59,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981893759] [2021-10-28 09:49:59,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:49:59,924 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:49:59,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:59,928 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:49:59,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-28 09:50:00,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:50:00,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:50:00,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 09:50:00,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:50:00,139 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:50:00,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981893759] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:50:00,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:50:00,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-10-28 09:50:00,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877559966] [2021-10-28 09:50:00,141 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:50:00,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:50:00,142 INFO L85 PathProgramCache]: Analyzing trace with hash 48762, now seen corresponding path program 9 times [2021-10-28 09:50:00,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:50:00,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703079] [2021-10-28 09:50:00,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:50:00,143 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:50:00,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:50:00,151 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:50:00,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:50:00,162 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:50:00,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:50:00,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 09:50:00,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-10-28 09:50:00,276 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. cyclomatic complexity: 4 Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 12 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 09:50:00,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:50:00,323 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2021-10-28 09:50:00,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 09:50:00,324 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 27 transitions. [2021-10-28 09:50:00,327 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-28 09:50:00,327 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 25 states and 27 transitions. [2021-10-28 09:50:00,328 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2021-10-28 09:50:00,328 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2021-10-28 09:50:00,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 27 transitions. [2021-10-28 09:50:00,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:50:00,328 INFO L681 BuchiCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-10-28 09:50:00,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 27 transitions. [2021-10-28 09:50:00,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-10-28 09:50:00,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 23 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 09:50:00,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-10-28 09:50:00,335 INFO L704 BuchiCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-10-28 09:50:00,335 INFO L587 BuchiCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-10-28 09:50:00,335 INFO L425 BuchiCegarLoop]: ======== Iteration 11============ [2021-10-28 09:50:00,335 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 26 transitions. [2021-10-28 09:50:00,336 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-28 09:50:00,336 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:50:00,336 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:50:00,338 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [9, 9, 1, 1, 1] [2021-10-28 09:50:00,338 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-28 09:50:00,338 INFO L791 eck$LassoCheckResult]: Stem: 726#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 727#L-1 havoc main_#res;havoc main_#t~nondet0, main_#t~nondet2, main_#t~pre1, main_~n~0, main_#t~nondet5, main_#t~mem3, main_#t~short4, main_~i~0, main_~#a~0.base, main_~#a~0.offset;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;call main_~#a~0.base, main_~#a~0.offset := #Ultimate.allocOnStack(40);main_~n~0 := 0; 730#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 731#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 732#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 728#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 729#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 746#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 745#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 744#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 743#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 742#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 741#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 740#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 739#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 738#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 737#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 736#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 735#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 734#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 733#L13-3 assume !(main_~n~0 < 10); 725#L17-4 [2021-10-28 09:50:00,339 INFO L793 eck$LassoCheckResult]: Loop: 725#L17-4 main_#t~short4 := 0 <= main_~i~0 && main_~i~0 < 10; 723#L17 assume main_#t~short4;call main_#t~mem3 := read~int(main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4);main_#t~short4 := main_#t~mem3 >= 0; 724#L17-2 assume !!main_#t~short4;havoc main_#t~mem3;havoc main_#t~short4;call write~int(0, main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4);main_~i~0 := main_#t~nondet5;havoc main_#t~nondet5; 725#L17-4 [2021-10-28 09:50:00,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:50:00,339 INFO L85 PathProgramCache]: Analyzing trace with hash 684734547, now seen corresponding path program 9 times [2021-10-28 09:50:00,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:50:00,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957184483] [2021-10-28 09:50:00,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:50:00,340 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:50:00,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:50:00,516 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:50:00,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:50:00,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957184483] [2021-10-28 09:50:00,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957184483] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:50:00,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861403227] [2021-10-28 09:50:00,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:50:00,525 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:50:00,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:50:00,527 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:50:00,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-28 09:50:00,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-10-28 09:50:00,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:50:00,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 09:50:00,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:50:00,768 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:50:00,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861403227] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:50:00,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:50:00,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-10-28 09:50:00,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009389539] [2021-10-28 09:50:00,771 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:50:00,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:50:00,772 INFO L85 PathProgramCache]: Analyzing trace with hash 48762, now seen corresponding path program 10 times [2021-10-28 09:50:00,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:50:00,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539703687] [2021-10-28 09:50:00,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:50:00,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:50:00,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:50:00,779 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:50:00,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:50:00,786 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:50:00,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:50:00,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 09:50:00,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-10-28 09:50:00,908 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. cyclomatic complexity: 4 Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 13 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 09:50:00,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:50:00,953 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-10-28 09:50:00,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 09:50:00,954 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 28 transitions. [2021-10-28 09:50:00,954 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-28 09:50:00,955 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 26 states and 28 transitions. [2021-10-28 09:50:00,955 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2021-10-28 09:50:00,955 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2021-10-28 09:50:00,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 28 transitions. [2021-10-28 09:50:00,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:50:00,956 INFO L681 BuchiCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-10-28 09:50:00,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states and 28 transitions. [2021-10-28 09:50:00,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-28 09:50:00,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 09:50:00,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-10-28 09:50:00,959 INFO L704 BuchiCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-10-28 09:50:00,959 INFO L587 BuchiCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-10-28 09:50:00,960 INFO L425 BuchiCegarLoop]: ======== Iteration 12============ [2021-10-28 09:50:00,960 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 26 states and 28 transitions. [2021-10-28 09:50:00,960 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-28 09:50:00,961 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:50:00,961 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:50:00,962 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [10, 10, 1, 1, 1] [2021-10-28 09:50:00,962 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-28 09:50:00,962 INFO L791 eck$LassoCheckResult]: Stem: 852#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 853#L-1 havoc main_#res;havoc main_#t~nondet0, main_#t~nondet2, main_#t~pre1, main_~n~0, main_#t~nondet5, main_#t~mem3, main_#t~short4, main_~i~0, main_~#a~0.base, main_~#a~0.offset;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;call main_~#a~0.base, main_~#a~0.offset := #Ultimate.allocOnStack(40);main_~n~0 := 0; 856#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 857#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 858#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 854#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 855#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 874#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 873#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 872#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 871#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 870#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 869#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 868#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 867#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 866#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 865#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 864#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 863#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 862#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 861#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 860#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 859#L13-3 assume !(main_~n~0 < 10); 851#L17-4 [2021-10-28 09:50:00,962 INFO L793 eck$LassoCheckResult]: Loop: 851#L17-4 main_#t~short4 := 0 <= main_~i~0 && main_~i~0 < 10; 849#L17 assume main_#t~short4;call main_#t~mem3 := read~int(main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4);main_#t~short4 := main_#t~mem3 >= 0; 850#L17-2 assume !!main_#t~short4;havoc main_#t~mem3;havoc main_#t~short4;call write~int(0, main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4);main_~i~0 := main_#t~nondet5;havoc main_#t~nondet5; 851#L17-4 [2021-10-28 09:50:00,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:50:00,963 INFO L85 PathProgramCache]: Analyzing trace with hash 899905681, now seen corresponding path program 10 times [2021-10-28 09:50:00,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:50:00,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310206979] [2021-10-28 09:50:00,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:50:00,964 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:50:00,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:50:00,981 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:50:00,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:50:01,002 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:50:01,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:50:01,003 INFO L85 PathProgramCache]: Analyzing trace with hash 48762, now seen corresponding path program 11 times [2021-10-28 09:50:01,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:50:01,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78012186] [2021-10-28 09:50:01,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:50:01,004 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:50:01,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:50:01,009 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:50:01,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:50:01,013 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:50:01,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:50:01,014 INFO L85 PathProgramCache]: Analyzing trace with hash -95699990, now seen corresponding path program 1 times [2021-10-28 09:50:01,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:50:01,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095832016] [2021-10-28 09:50:01,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:50:01,015 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:50:01,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:50:01,036 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:50:01,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:50:01,102 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:50:05,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.10 09:50:05 BoogieIcfgContainer [2021-10-28 09:50:05,983 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-10-28 09:50:05,984 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 09:50:05,984 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 09:50:05,984 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 09:50:05,985 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:49:53" (3/4) ... [2021-10-28 09:50:05,988 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2021-10-28 09:50:06,036 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 09:50:06,037 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 09:50:06,038 INFO L168 Benchmark]: Toolchain (without parser) took 13160.86 ms. Allocated memory was 136.3 MB in the beginning and 174.1 MB in the end (delta: 37.7 MB). Free memory was 102.5 MB in the beginning and 91.9 MB in the end (delta: 10.6 MB). Peak memory consumption was 47.2 MB. Max. memory is 16.1 GB. [2021-10-28 09:50:06,039 INFO L168 Benchmark]: CDTParser took 0.41 ms. Allocated memory is still 83.9 MB. Free memory was 56.9 MB in the beginning and 56.9 MB in the end (delta: 26.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:50:06,040 INFO L168 Benchmark]: CACSL2BoogieTranslator took 435.49 ms. Allocated memory is still 136.3 MB. Free memory was 102.2 MB in the beginning and 113.8 MB in the end (delta: -11.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 09:50:06,040 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.57 ms. Allocated memory is still 136.3 MB. Free memory was 113.8 MB in the beginning and 112.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:50:06,041 INFO L168 Benchmark]: Boogie Preprocessor took 57.86 ms. Allocated memory is still 136.3 MB. Free memory was 112.3 MB in the beginning and 111.3 MB in the end (delta: 969.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:50:06,041 INFO L168 Benchmark]: RCFGBuilder took 451.52 ms. Allocated memory is still 136.3 MB. Free memory was 111.3 MB in the beginning and 101.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 09:50:06,042 INFO L168 Benchmark]: BuchiAutomizer took 12099.84 ms. Allocated memory was 136.3 MB in the beginning and 174.1 MB in the end (delta: 37.7 MB). Free memory was 101.3 MB in the beginning and 94.0 MB in the end (delta: 7.3 MB). Peak memory consumption was 46.0 MB. Max. memory is 16.1 GB. [2021-10-28 09:50:06,043 INFO L168 Benchmark]: Witness Printer took 53.14 ms. Allocated memory is still 174.1 MB. Free memory was 94.0 MB in the beginning and 91.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:50:06,046 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41 ms. Allocated memory is still 83.9 MB. Free memory was 56.9 MB in the beginning and 56.9 MB in the end (delta: 26.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 435.49 ms. Allocated memory is still 136.3 MB. Free memory was 102.2 MB in the beginning and 113.8 MB in the end (delta: -11.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 52.57 ms. Allocated memory is still 136.3 MB. Free memory was 113.8 MB in the beginning and 112.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 57.86 ms. Allocated memory is still 136.3 MB. Free memory was 112.3 MB in the beginning and 111.3 MB in the end (delta: 969.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 451.52 ms. Allocated memory is still 136.3 MB. Free memory was 111.3 MB in the beginning and 101.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 12099.84 ms. Allocated memory was 136.3 MB in the beginning and 174.1 MB in the end (delta: 37.7 MB). Free memory was 101.3 MB in the beginning and 94.0 MB in the end (delta: 7.3 MB). Peak memory consumption was 46.0 MB. Max. memory is 16.1 GB. * Witness Printer took 53.14 ms. Allocated memory is still 174.1 MB. Free memory was 94.0 MB in the beginning and 91.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 11 terminating modules (10 trivial, 1 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function 19 * unknown-#length-unknown[a] + -8 * n and consists of 5 locations. 10 modules have a trivial ranking function, the largest among these consists of 13 locations. The remainder module has 26 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 12.0s and 12 iterations. TraceHistogramMax:10. Analysis of lassos took 11.1s. Construction of modules took 0.2s. Büchi inclusion checks took 0.4s. Highest rank in rank-based complementation 3. Minimization of det autom 11. Minimization of nondet autom 0. Automata minimization 0.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 10 StatesRemovedByMinimization, 10 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 26 states and ocurred in iteration 11. Nontrivial modules had stage [1, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 75 SDtfs, 62 SDslu, 131 SDs, 0 SdLazy, 180 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT0 conc0 concLT0 SILN0 SILU10 SILI0 SILT0 lasso1 LassoPreprocessingBenchmarks: Lassos: inital88 mio100 ax100 hnf100 lsp93 ukn59 mio100 lsp69 div100 bol100 ite100 ukn100 eq152 hnf92 smp100 dnf100 smp100 tf100 neg100 sie104 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 46ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 0 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.0s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 17]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {NULL=1} State at position 1 is {org.eclipse.cdt.internal.core.dom.parser.c.CASTArraySubscriptExpression@bde566d=0, NULL=0, \result=0, NULL=1, n=10, i=7, a=2, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@3946e7ae=7, org.eclipse.cdt.internal.core.dom.parser.c.CASTUnaryExpression@1fc0b6ee=0, NULL=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@55c0487e=0, a=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@e3949ea=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTBinaryExpression@7f4d5efb=0} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 9]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L10] int i = __VERIFIER_nondet_int(); [L11] int a[10]; [L13] int n = 0; [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND FALSE !(n < 10) Loop: [L17] 0 <= i && i < 10 && a[i] >= 0 [L17] EXPR a[i] [L17] 0 <= i && i < 10 && a[i] >= 0 [L17] COND TRUE 0 <= i && i < 10 && a[i] >= 0 [L18] a[i] = 0 [L19] i = __VERIFIER_nondet_int() End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2021-10-28 09:50:06,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-28 09:50:06,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-10-28 09:50:06,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-10-28 09:50:06,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-10-28 09:50:06,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-28 09:50:07,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-28 09:50:07,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-28 09:50:07,523 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-10-28 09:50:07,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 09:50:07,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bb14c9-6459-4eac-a5fb-02549517eb21/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...