./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/NonTermination3-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NonTermination3-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be --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 fabc9d8a61dd824da0c561a6d62c57fe8eb320f6ad8009599cd12699fa04e01c ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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-e943c26 [2021-10-21 20:10:19,343 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 20:10:19,346 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 20:10:19,390 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 20:10:19,391 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 20:10:19,393 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 20:10:19,395 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 20:10:19,401 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 20:10:19,405 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 20:10:19,411 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 20:10:19,412 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 20:10:19,414 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 20:10:19,415 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 20:10:19,418 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 20:10:19,421 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 20:10:19,427 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 20:10:19,430 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 20:10:19,432 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 20:10:19,436 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 20:10:19,443 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 20:10:19,445 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 20:10:19,446 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 20:10:19,448 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 20:10:19,449 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 20:10:19,452 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 20:10:19,453 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 20:10:19,453 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 20:10:19,454 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 20:10:19,455 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 20:10:19,457 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 20:10:19,457 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 20:10:19,458 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 20:10:19,460 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 20:10:19,461 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 20:10:19,462 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 20:10:19,463 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 20:10:19,464 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 20:10:19,465 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 20:10:19,465 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 20:10:19,466 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 20:10:19,467 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 20:10:19,468 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-10-21 20:10:19,497 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 20:10:19,497 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 20:10:19,498 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 20:10:19,498 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 20:10:19,499 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 20:10:19,500 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 20:10:19,500 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 20:10:19,500 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-10-21 20:10:19,501 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-10-21 20:10:19,501 INFO L138 SettingsManager]: * Use old map elimination=false [2021-10-21 20:10:19,501 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-10-21 20:10:19,501 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-10-21 20:10:19,502 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-10-21 20:10:19,502 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 20:10:19,502 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 20:10:19,502 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 20:10:19,503 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 20:10:19,503 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-10-21 20:10:19,503 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-10-21 20:10:19,503 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-10-21 20:10:19,504 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 20:10:19,504 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-10-21 20:10:19,504 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 20:10:19,504 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-10-21 20:10:19,505 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 20:10:19,505 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 20:10:19,505 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 20:10:19,505 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 20:10:19,506 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 20:10:19,507 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-10-21 20:10:19,507 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_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fabc9d8a61dd824da0c561a6d62c57fe8eb320f6ad8009599cd12699fa04e01c [2021-10-21 20:10:19,759 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 20:10:19,786 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 20:10:19,789 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 20:10:19,790 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 20:10:19,791 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 20:10:19,792 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/termination-crafted/NonTermination3-1.c [2021-10-21 20:10:19,890 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/data/a88d93536/74388965284c4795945db710615aa37b/FLAG523475770 [2021-10-21 20:10:20,313 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 20:10:20,313 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/sv-benchmarks/c/termination-crafted/NonTermination3-1.c [2021-10-21 20:10:20,320 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/data/a88d93536/74388965284c4795945db710615aa37b/FLAG523475770 [2021-10-21 20:10:20,702 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/data/a88d93536/74388965284c4795945db710615aa37b [2021-10-21 20:10:20,705 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 20:10:20,706 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 20:10:20,708 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 20:10:20,708 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 20:10:20,712 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 20:10:20,713 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:10:20" (1/1) ... [2021-10-21 20:10:20,714 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5927da5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:10:20, skipping insertion in model container [2021-10-21 20:10:20,715 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:10:20" (1/1) ... [2021-10-21 20:10:20,722 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 20:10:20,734 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 20:10:20,903 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:10:20,907 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 20:10:20,921 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:10:20,936 INFO L208 MainTranslator]: Completed translation [2021-10-21 20:10:20,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:10:20 WrapperNode [2021-10-21 20:10:20,937 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 20:10:20,938 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 20:10:20,938 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 20:10:20,938 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 20:10:20,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:10:20" (1/1) ... [2021-10-21 20:10:20,955 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:10:20" (1/1) ... [2021-10-21 20:10:20,974 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 20:10:20,975 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 20:10:20,975 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 20:10:20,976 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 20:10:20,984 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:10:20" (1/1) ... [2021-10-21 20:10:20,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:10:20" (1/1) ... [2021-10-21 20:10:20,986 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:10:20" (1/1) ... [2021-10-21 20:10:20,987 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:10:20" (1/1) ... [2021-10-21 20:10:20,992 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:10:20" (1/1) ... [2021-10-21 20:10:20,996 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:10:20" (1/1) ... [2021-10-21 20:10:20,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:10:20" (1/1) ... [2021-10-21 20:10:20,999 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 20:10:21,000 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 20:10:21,001 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 20:10:21,001 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 20:10:21,002 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:10:20" (1/1) ... [2021-10-21 20:10:21,011 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:10:21,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:10:21,046 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:10:21,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-10-21 20:10:21,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 20:10:21,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 20:10:21,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 20:10:21,112 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 20:10:21,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 20:10:21,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 20:10:21,362 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 20:10:21,362 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-21 20:10:21,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:10:21 BoogieIcfgContainer [2021-10-21 20:10:21,368 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 20:10:21,369 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-10-21 20:10:21,380 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-10-21 20:10:21,384 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-10-21 20:10:21,384 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-21 20:10:21,385 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 21.10 08:10:20" (1/3) ... [2021-10-21 20:10:21,399 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1cacdaaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 21.10 08:10:21, skipping insertion in model container [2021-10-21 20:10:21,399 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-21 20:10:21,399 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:10:20" (2/3) ... [2021-10-21 20:10:21,400 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1cacdaaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 21.10 08:10:21, skipping insertion in model container [2021-10-21 20:10:21,400 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-21 20:10:21,400 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:10:21" (3/3) ... [2021-10-21 20:10:21,401 INFO L389 chiAutomizerObserver]: Analyzing ICFG NonTermination3-1.c [2021-10-21 20:10:21,472 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-10-21 20:10:21,472 INFO L360 BuchiCegarLoop]: Hoare is false [2021-10-21 20:10:21,472 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-10-21 20:10:21,472 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-21 20:10:21,472 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-21 20:10:21,472 INFO L364 BuchiCegarLoop]: Difference is false [2021-10-21 20:10:21,473 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-21 20:10:21,473 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-10-21 20:10:21,487 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) [2021-10-21 20:10:21,506 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 5 [2021-10-21 20:10:21,506 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 20:10:21,506 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 20:10:21,512 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-21 20:10:21,512 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-10-21 20:10:21,512 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-10-21 20:10:21,513 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) [2021-10-21 20:10:21,514 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 5 [2021-10-21 20:10:21,514 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 20:10:21,514 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 20:10:21,515 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-21 20:10:21,515 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-10-21 20:10:21,521 INFO L791 eck$LassoCheckResult]: Stem: 7#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 [2021-10-21 20:10:21,522 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 [2021-10-21 20:10:21,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:10:21,528 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2021-10-21 20:10:21,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:10:21,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462827597] [2021-10-21 20:10:21,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:21,539 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:10:21,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:10:21,626 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:10:21,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:10:21,660 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:10:21,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:10:21,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1283, now seen corresponding path program 1 times [2021-10-21 20:10:21,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:10:21,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415638411] [2021-10-21 20:10:21,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:21,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:10:21,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:10:21,679 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:10:21,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:10:21,689 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:10:21,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:10:21,691 INFO L82 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2021-10-21 20:10:21,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:10:21,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039471768] [2021-10-21 20:10:21,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:21,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:10:21,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:10:21,729 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:10:21,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:10:21,749 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:10:22,043 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 20:10:22,044 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 20:10:22,044 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 20:10:22,044 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 20:10:22,044 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-21 20:10:22,044 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:10:22,044 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 20:10:22,045 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 20:10:22,045 INFO L133 ssoRankerPreferences]: Filename of dumped script: NonTermination3-1.c_Iteration1_Lasso [2021-10-21 20:10:22,045 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 20:10:22,045 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 20:10:22,073 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:10:22,082 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:10:22,091 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:10:22,109 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:10:22,112 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:10:22,127 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:10:22,130 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:10:22,207 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:10:22,210 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:10:22,213 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:10:22,359 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 20:10:22,364 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-21 20:10:22,366 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:10:22,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:10:22,368 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:10:22,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-10-21 20:10:22,389 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 [2021-10-21 20:10:22,399 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 20:10:22,400 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 20:10:22,400 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 20:10:22,400 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 20:10:22,400 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 20:10:22,402 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 20:10:22,402 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 20:10:22,421 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 20:10:22,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-10-21 20:10:22,458 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:10:22,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:10:22,465 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:10:22,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-10-21 20:10:22,472 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 [2021-10-21 20:10:22,482 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 20:10:22,482 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 20:10:22,482 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 20:10:22,482 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 20:10:22,482 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 20:10:22,484 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 20:10:22,485 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 20:10:22,500 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 20:10:22,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Ended with exit code 0 [2021-10-21 20:10:22,525 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:10:22,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:10:22,527 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:10:22,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-10-21 20:10:22,532 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 [2021-10-21 20:10:22,540 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 20:10:22,540 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 20:10:22,540 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 20:10:22,540 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 20:10:22,540 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 20:10:22,543 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 20:10:22,543 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 20:10:22,551 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 20:10:22,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-10-21 20:10:22,577 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:10:22,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:10:22,579 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:10:22,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-10-21 20:10:22,580 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 [2021-10-21 20:10:22,588 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 20:10:22,588 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 20:10:22,588 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 20:10:22,588 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 20:10:22,588 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 20:10:22,589 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 20:10:22,589 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 20:10:22,613 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 20:10:22,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-10-21 20:10:22,637 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:10:22,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:10:22,638 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:10:22,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-10-21 20:10:22,643 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 [2021-10-21 20:10:22,651 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 20:10:22,651 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 20:10:22,651 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 20:10:22,651 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 20:10:22,656 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-21 20:10:22,657 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-21 20:10:22,684 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 20:10:22,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Ended with exit code 0 [2021-10-21 20:10:22,708 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:10:22,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:10:22,710 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:10:22,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-10-21 20:10:22,723 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 [2021-10-21 20:10:22,742 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 20:10:22,743 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 20:10:22,743 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 20:10:22,743 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 20:10:22,743 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 20:10:22,744 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 20:10:22,744 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 20:10:22,760 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 20:10:22,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-10-21 20:10:22,794 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:10:22,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:10:22,795 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:10:22,801 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 [2021-10-21 20:10:22,812 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 20:10:22,812 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 20:10:22,812 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 20:10:22,813 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 20:10:22,827 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-21 20:10:22,827 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-21 20:10:22,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-10-21 20:10:22,838 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 20:10:22,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-10-21 20:10:22,881 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:10:22,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:10:22,885 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:10:22,891 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 [2021-10-21 20:10:22,901 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 20:10:22,901 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 20:10:22,902 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 20:10:22,902 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 20:10:22,908 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-21 20:10:22,908 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-21 20:10:22,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-10-21 20:10:22,928 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 20:10:22,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-10-21 20:10:22,966 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:10:22,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:10:22,967 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:10:22,973 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 [2021-10-21 20:10:22,982 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 20:10:22,983 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 20:10:22,983 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 20:10:22,983 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 20:10:22,988 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-21 20:10:22,988 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-21 20:10:22,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-10-21 20:10:23,016 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 20:10:23,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Ended with exit code 0 [2021-10-21 20:10:23,039 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:10:23,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:10:23,040 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:10:23,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-10-21 20:10:23,045 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 [2021-10-21 20:10:23,052 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 20:10:23,052 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 20:10:23,053 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 20:10:23,053 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 20:10:23,053 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 20:10:23,054 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 20:10:23,054 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 20:10:23,058 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 20:10:23,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-10-21 20:10:23,079 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:10:23,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:10:23,080 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:10:23,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-10-21 20:10:23,084 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 [2021-10-21 20:10:23,091 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 20:10:23,092 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 20:10:23,092 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 20:10:23,092 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 20:10:23,092 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 20:10:23,093 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 20:10:23,093 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 20:10:23,106 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 20:10:23,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-10-21 20:10:23,140 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:10:23,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:10:23,148 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:10:23,157 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 [2021-10-21 20:10:23,167 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 20:10:23,167 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 20:10:23,168 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 20:10:23,168 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 20:10:23,176 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-21 20:10:23,177 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-21 20:10:23,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-10-21 20:10:23,191 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-21 20:10:23,225 INFO L443 ModelExtractionUtils]: Simplification made 12 calls to the SMT solver. [2021-10-21 20:10:23,225 INFO L444 ModelExtractionUtils]: 0 out of 13 variables were initially zero. Simplification set additionally 10 variables to zero. [2021-10-21 20:10:23,227 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:10:23,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:10:23,228 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:10:23,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-10-21 20:10:23,234 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-21 20:10:23,262 INFO L438 nArgumentSynthesizer]: Removed 2 redundant supporting invariants from a total of 2. [2021-10-21 20:10:23,262 INFO L513 LassoAnalysis]: Proved termination. [2021-10-21 20:10:23,263 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 [] [2021-10-21 20:10:23,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-10-21 20:10:23,308 INFO L297 tatePredicateManager]: 1 out of 1 supporting invariants were superfluous and have been removed [2021-10-21 20:10:23,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:10:23,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:23,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-21 20:10:23,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:10:23,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:23,375 WARN L261 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 20:10:23,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:10:23,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:10:23,459 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 [2021-10-21 20:10:23,460 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) [2021-10-21 20:10:23,515 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. [2021-10-21 20:10:23,516 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 [2021-10-21 20:10:23,517 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) [2021-10-21 20:10:23,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 21 transitions. [2021-10-21 20:10:23,519 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 2 letters. Loop has 2 letters. [2021-10-21 20:10:23,519 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 20:10:23,519 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 4 letters. Loop has 2 letters. [2021-10-21 20:10:23,519 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 20:10:23,519 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 2 letters. Loop has 4 letters. [2021-10-21 20:10:23,520 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 20:10:23,520 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 37 transitions. [2021-10-21 20:10:23,523 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-21 20:10:23,526 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 9 states and 12 transitions. [2021-10-21 20:10:23,526 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2021-10-21 20:10:23,527 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2021-10-21 20:10:23,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 12 transitions. [2021-10-21 20:10:23,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 20:10:23,527 INFO L681 BuchiCegarLoop]: Abstraction has 9 states and 12 transitions. [2021-10-21 20:10:23,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 12 transitions. [2021-10-21 20:10:23,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2021-10-21 20:10:23,549 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) [2021-10-21 20:10:23,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 11 transitions. [2021-10-21 20:10:23,551 INFO L704 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2021-10-21 20:10:23,551 INFO L587 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2021-10-21 20:10:23,551 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-10-21 20:10:23,551 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states and 11 transitions. [2021-10-21 20:10:23,552 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-21 20:10:23,552 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 20:10:23,552 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 20:10:23,552 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-10-21 20:10:23,552 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-21 20:10:23,553 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 [2021-10-21 20:10:23,553 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;main_~i~0 := main_#t~nondet5;havoc main_#t~nondet5;call write~int(0, main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4); 82#L17-4 [2021-10-21 20:10:23,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:10:23,553 INFO L82 PathProgramCache]: Analyzing trace with hash 29861, now seen corresponding path program 1 times [2021-10-21 20:10:23,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:10:23,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707682051] [2021-10-21 20:10:23,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:23,554 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:10:23,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:23,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:10:23,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:10:23,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707682051] [2021-10-21 20:10:23,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707682051] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:10:23,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:10:23,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-21 20:10:23,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744452985] [2021-10-21 20:10:23,596 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 20:10:23,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:10:23,597 INFO L82 PathProgramCache]: Analyzing trace with hash 48762, now seen corresponding path program 1 times [2021-10-21 20:10:23,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:10:23,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961374090] [2021-10-21 20:10:23,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:23,598 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:10:23,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:10:23,608 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:10:23,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:10:23,620 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:10:23,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2021-10-21 20:10:23,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:10:23,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 20:10:23,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:10:23,877 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) [2021-10-21 20:10:23,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:10:23,890 INFO L93 Difference]: Finished difference Result 9 states and 11 transitions. [2021-10-21 20:10:23,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 20:10:23,891 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 9 states and 11 transitions. [2021-10-21 20:10:23,892 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-21 20:10:23,893 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 9 states to 9 states and 11 transitions. [2021-10-21 20:10:23,893 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2021-10-21 20:10:23,893 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2021-10-21 20:10:23,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 11 transitions. [2021-10-21 20:10:23,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 20:10:23,894 INFO L681 BuchiCegarLoop]: Abstraction has 9 states and 11 transitions. [2021-10-21 20:10:23,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 11 transitions. [2021-10-21 20:10:23,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2021-10-21 20:10:23,895 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) [2021-10-21 20:10:23,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2021-10-21 20:10:23,896 INFO L704 BuchiCegarLoop]: Abstraction has 8 states and 10 transitions. [2021-10-21 20:10:23,896 INFO L587 BuchiCegarLoop]: Abstraction has 8 states and 10 transitions. [2021-10-21 20:10:23,896 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-10-21 20:10:23,896 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states and 10 transitions. [2021-10-21 20:10:23,897 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-21 20:10:23,897 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 20:10:23,897 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 20:10:23,897 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2021-10-21 20:10:23,898 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-21 20:10:23,898 INFO L791 eck$LassoCheckResult]: Stem: 106#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 107#L-1 havoc main_#res;havoc main_#t~nondet0, main_#t~nondet2, main_#t~pre1, main_~n~0, main_#t~nondet5, main_#t~mem3, main_#t~short4, main_~i~0, main_~#a~0.base, main_~#a~0.offset;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;call main_~#a~0.base, main_~#a~0.offset := #Ultimate.allocOnStack(40);main_~n~0 := 0; 110#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 108#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 109#L13-3 assume !(main_~n~0 < 10); 105#L17-4 [2021-10-21 20:10:23,898 INFO L793 eck$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;main_~i~0 := main_#t~nondet5;havoc main_#t~nondet5;call write~int(0, main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4); 105#L17-4 [2021-10-21 20:10:23,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:10:23,899 INFO L82 PathProgramCache]: Analyzing trace with hash 28698723, now seen corresponding path program 1 times [2021-10-21 20:10:23,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:10:23,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068465021] [2021-10-21 20:10:23,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:23,900 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:10:23,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:23,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:10:23,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:10:23,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068465021] [2021-10-21 20:10:23,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068465021] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:10:23,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930645620] [2021-10-21 20:10:23,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:23,964 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:10:23,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:10:23,973 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:10:23,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-21 20:10:24,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:24,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:10:24,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:10:24,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:10:24,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930645620] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:10:24,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:10:24,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-10-21 20:10:24,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249405120] [2021-10-21 20:10:24,060 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 20:10:24,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:10:24,061 INFO L82 PathProgramCache]: Analyzing trace with hash 48762, now seen corresponding path program 2 times [2021-10-21 20:10:24,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:10:24,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241500585] [2021-10-21 20:10:24,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:24,062 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:10:24,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:10:24,071 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:10:24,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:10:24,093 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:10:24,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:10:24,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 20:10:24,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:10:24,261 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) [2021-10-21 20:10:24,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:10:24,285 INFO L93 Difference]: Finished difference Result 11 states and 13 transitions. [2021-10-21 20:10:24,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:10:24,286 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 13 transitions. [2021-10-21 20:10:24,287 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-21 20:10:24,289 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 11 states and 13 transitions. [2021-10-21 20:10:24,289 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2021-10-21 20:10:24,289 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2021-10-21 20:10:24,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 13 transitions. [2021-10-21 20:10:24,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 20:10:24,289 INFO L681 BuchiCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-10-21 20:10:24,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 13 transitions. [2021-10-21 20:10:24,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2021-10-21 20:10:24,292 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) [2021-10-21 20:10:24,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-10-21 20:10:24,293 INFO L704 BuchiCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-10-21 20:10:24,293 INFO L587 BuchiCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-10-21 20:10:24,293 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-10-21 20:10:24,293 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 10 states and 12 transitions. [2021-10-21 20:10:24,296 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-21 20:10:24,296 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 20:10:24,296 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 20:10:24,298 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1] [2021-10-21 20:10:24,298 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-21 20:10:24,298 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 [2021-10-21 20:10:24,298 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;main_~i~0 := main_#t~nondet5;havoc main_#t~nondet5;call write~int(0, main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4); 144#L17-4 [2021-10-21 20:10:24,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:10:24,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1809671329, now seen corresponding path program 2 times [2021-10-21 20:10:24,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:10:24,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797410436] [2021-10-21 20:10:24,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:24,300 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:10:24,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:24,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:10:24,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:10:24,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797410436] [2021-10-21 20:10:24,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797410436] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:10:24,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504511181] [2021-10-21 20:10:24,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:10:24,363 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:10:24,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:10:24,364 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:10:24,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-21 20:10:24,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:10:24,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:10:24,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 20:10:24,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:10:24,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:10:24,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504511181] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:10:24,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:10:24,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-21 20:10:24,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526211963] [2021-10-21 20:10:24,456 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 20:10:24,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:10:24,456 INFO L82 PathProgramCache]: Analyzing trace with hash 48762, now seen corresponding path program 3 times [2021-10-21 20:10:24,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:10:24,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010043665] [2021-10-21 20:10:24,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:24,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:10:24,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:10:24,468 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:10:24,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:10:24,489 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:10:24,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:10:24,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:10:24,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:10:24,640 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) [2021-10-21 20:10:24,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:10:24,663 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-10-21 20:10:24,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 20:10:24,665 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 15 transitions. [2021-10-21 20:10:24,665 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-21 20:10:24,666 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 13 states and 15 transitions. [2021-10-21 20:10:24,666 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2021-10-21 20:10:24,666 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2021-10-21 20:10:24,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 15 transitions. [2021-10-21 20:10:24,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 20:10:24,666 INFO L681 BuchiCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-10-21 20:10:24,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 15 transitions. [2021-10-21 20:10:24,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2021-10-21 20:10:24,667 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) [2021-10-21 20:10:24,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-10-21 20:10:24,668 INFO L704 BuchiCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-10-21 20:10:24,668 INFO L587 BuchiCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-10-21 20:10:24,668 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-10-21 20:10:24,668 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 14 transitions. [2021-10-21 20:10:24,668 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-21 20:10:24,669 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 20:10:24,669 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 20:10:24,669 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [3, 3, 1, 1, 1] [2021-10-21 20:10:24,669 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-21 20:10:24,669 INFO L791 eck$LassoCheckResult]: Stem: 195#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 196#L-1 havoc main_#res;havoc main_#t~nondet0, main_#t~nondet2, main_#t~pre1, main_~n~0, main_#t~nondet5, main_#t~mem3, main_#t~short4, main_~i~0, main_~#a~0.base, main_~#a~0.offset;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;call main_~#a~0.base, main_~#a~0.offset := #Ultimate.allocOnStack(40);main_~n~0 := 0; 199#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 197#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 198#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 200#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 203#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 202#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 201#L13-3 assume !(main_~n~0 < 10); 194#L17-4 [2021-10-21 20:10:24,669 INFO L793 eck$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;main_~i~0 := main_#t~nondet5;havoc main_#t~nondet5;call write~int(0, main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4); 194#L17-4 [2021-10-21 20:10:24,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:10:24,670 INFO L82 PathProgramCache]: Analyzing trace with hash -367605409, now seen corresponding path program 3 times [2021-10-21 20:10:24,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:10:24,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616420521] [2021-10-21 20:10:24,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:24,671 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:10:24,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:24,713 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:10:24,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:10:24,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616420521] [2021-10-21 20:10:24,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616420521] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:10:24,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367897536] [2021-10-21 20:10:24,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:10:24,714 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:10:24,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:10:24,738 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:10:24,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-21 20:10:24,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-21 20:10:24,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:10:24,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 20:10:24,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:10:24,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:10:24,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367897536] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:10:24,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:10:24,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-10-21 20:10:24,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615608789] [2021-10-21 20:10:24,835 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 20:10:24,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:10:24,836 INFO L82 PathProgramCache]: Analyzing trace with hash 48762, now seen corresponding path program 4 times [2021-10-21 20:10:24,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:10:24,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331109753] [2021-10-21 20:10:24,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:24,836 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:10:24,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:10:24,857 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:10:24,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:10:24,870 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:10:25,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:10:25,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 20:10:25,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:10:25,006 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) [2021-10-21 20:10:25,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:10:25,031 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2021-10-21 20:10:25,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:10:25,032 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 15 states and 17 transitions. [2021-10-21 20:10:25,033 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-21 20:10:25,033 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 15 states to 15 states and 17 transitions. [2021-10-21 20:10:25,033 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2021-10-21 20:10:25,033 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2021-10-21 20:10:25,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 17 transitions. [2021-10-21 20:10:25,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 20:10:25,034 INFO L681 BuchiCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-10-21 20:10:25,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states and 17 transitions. [2021-10-21 20:10:25,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-10-21 20:10:25,035 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) [2021-10-21 20:10:25,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-10-21 20:10:25,036 INFO L704 BuchiCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-10-21 20:10:25,036 INFO L587 BuchiCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-10-21 20:10:25,036 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-10-21 20:10:25,036 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states and 16 transitions. [2021-10-21 20:10:25,036 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-21 20:10:25,036 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 20:10:25,036 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 20:10:25,037 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [4, 4, 1, 1, 1] [2021-10-21 20:10:25,037 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-21 20:10:25,037 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 [2021-10-21 20:10:25,037 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;main_~i~0 := main_#t~nondet5;havoc main_#t~nondet5;call write~int(0, main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4); 255#L17-4 [2021-10-21 20:10:25,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:10:25,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1081477475, now seen corresponding path program 4 times [2021-10-21 20:10:25,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:10:25,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908076312] [2021-10-21 20:10:25,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:25,038 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:10:25,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:25,090 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:10:25,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:10:25,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908076312] [2021-10-21 20:10:25,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908076312] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:10:25,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200022530] [2021-10-21 20:10:25,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 20:10:25,091 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:10:25,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:10:25,093 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:10:25,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-21 20:10:25,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 20:10:25,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:10:25,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 20:10:25,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:10:25,181 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:10:25,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200022530] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:10:25,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:10:25,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-10-21 20:10:25,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131043851] [2021-10-21 20:10:25,182 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 20:10:25,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:10:25,182 INFO L82 PathProgramCache]: Analyzing trace with hash 48762, now seen corresponding path program 5 times [2021-10-21 20:10:25,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:10:25,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754880528] [2021-10-21 20:10:25,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:25,183 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:10:25,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:10:25,188 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:10:25,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:10:25,194 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:10:25,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:10:25,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 20:10:25,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:10:25,326 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) [2021-10-21 20:10:25,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:10:25,352 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2021-10-21 20:10:25,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:10:25,354 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 17 states and 19 transitions. [2021-10-21 20:10:25,355 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-21 20:10:25,355 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 17 states to 17 states and 19 transitions. [2021-10-21 20:10:25,355 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2021-10-21 20:10:25,355 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2021-10-21 20:10:25,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 19 transitions. [2021-10-21 20:10:25,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 20:10:25,356 INFO L681 BuchiCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-10-21 20:10:25,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states and 19 transitions. [2021-10-21 20:10:25,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-10-21 20:10:25,357 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) [2021-10-21 20:10:25,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-10-21 20:10:25,357 INFO L704 BuchiCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-10-21 20:10:25,357 INFO L587 BuchiCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-10-21 20:10:25,357 INFO L425 BuchiCegarLoop]: ======== Iteration 7============ [2021-10-21 20:10:25,358 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states and 18 transitions. [2021-10-21 20:10:25,358 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-21 20:10:25,358 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 20:10:25,358 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 20:10:25,359 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [5, 5, 1, 1, 1] [2021-10-21 20:10:25,359 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-21 20:10:25,359 INFO L791 eck$LassoCheckResult]: Stem: 328#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 329#L-1 havoc main_#res;havoc main_#t~nondet0, main_#t~nondet2, main_#t~pre1, main_~n~0, main_#t~nondet5, main_#t~mem3, main_#t~short4, main_~i~0, main_~#a~0.base, main_~#a~0.offset;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;call main_~#a~0.base, main_~#a~0.offset := #Ultimate.allocOnStack(40);main_~n~0 := 0; 332#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 333#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 334#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 330#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 331#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 340#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 339#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 338#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 337#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 336#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 335#L13-3 assume !(main_~n~0 < 10); 327#L17-4 [2021-10-21 20:10:25,359 INFO L793 eck$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;main_~i~0 := main_#t~nondet5;havoc main_#t~nondet5;call write~int(0, main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4); 327#L17-4 [2021-10-21 20:10:25,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:10:25,359 INFO L82 PathProgramCache]: Analyzing trace with hash 82234459, now seen corresponding path program 5 times [2021-10-21 20:10:25,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:10:25,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665027360] [2021-10-21 20:10:25,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:25,360 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:10:25,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:25,452 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:10:25,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:10:25,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665027360] [2021-10-21 20:10:25,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665027360] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:10:25,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537713237] [2021-10-21 20:10:25,461 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 20:10:25,462 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:10:25,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:10:25,464 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:10:25,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-21 20:10:25,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-21 20:10:25,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:10:25,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 20:10:25,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:10:25,584 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:10:25,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537713237] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:10:25,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:10:25,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-10-21 20:10:25,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783842022] [2021-10-21 20:10:25,586 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 20:10:25,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:10:25,586 INFO L82 PathProgramCache]: Analyzing trace with hash 48762, now seen corresponding path program 6 times [2021-10-21 20:10:25,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:10:25,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079618515] [2021-10-21 20:10:25,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:25,587 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:10:25,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:10:25,592 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:10:25,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:10:25,598 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:10:25,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:10:25,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 20:10:25,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:10:25,728 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) [2021-10-21 20:10:25,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:10:25,755 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-10-21 20:10:25,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 20:10:25,755 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 19 states and 21 transitions. [2021-10-21 20:10:25,756 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-21 20:10:25,757 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 19 states to 19 states and 21 transitions. [2021-10-21 20:10:25,757 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2021-10-21 20:10:25,757 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2021-10-21 20:10:25,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 21 transitions. [2021-10-21 20:10:25,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 20:10:25,757 INFO L681 BuchiCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-10-21 20:10:25,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states and 21 transitions. [2021-10-21 20:10:25,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-10-21 20:10:25,759 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) [2021-10-21 20:10:25,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-10-21 20:10:25,759 INFO L704 BuchiCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-10-21 20:10:25,759 INFO L587 BuchiCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-10-21 20:10:25,759 INFO L425 BuchiCegarLoop]: ======== Iteration 8============ [2021-10-21 20:10:25,760 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 18 states and 20 transitions. [2021-10-21 20:10:25,760 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-21 20:10:25,760 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 20:10:25,760 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 20:10:25,761 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 1, 1, 1] [2021-10-21 20:10:25,761 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-21 20:10:25,761 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 [2021-10-21 20:10:25,761 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;main_~i~0 := main_#t~nondet5;havoc main_#t~nondet5;call write~int(0, main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4); 410#L17-4 [2021-10-21 20:10:25,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:10:25,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1717906073, now seen corresponding path program 6 times [2021-10-21 20:10:25,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:10:25,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463429969] [2021-10-21 20:10:25,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:25,762 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:10:25,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:25,830 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:10:25,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:10:25,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463429969] [2021-10-21 20:10:25,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463429969] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:10:25,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132308459] [2021-10-21 20:10:25,831 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 20:10:25,831 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:10:25,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:10:25,845 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:10:25,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-21 20:10:25,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-21 20:10:25,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:10:25,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 20:10:25,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:10:25,973 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:10:25,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132308459] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:10:25,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:10:25,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-10-21 20:10:25,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388697925] [2021-10-21 20:10:25,974 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 20:10:25,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:10:25,974 INFO L82 PathProgramCache]: Analyzing trace with hash 48762, now seen corresponding path program 7 times [2021-10-21 20:10:25,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:10:25,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537011721] [2021-10-21 20:10:25,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:25,975 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:10:25,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:10:25,980 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:10:25,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:10:25,986 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:10:26,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:10:26,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 20:10:26,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:10:26,108 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) [2021-10-21 20:10:26,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:10:26,140 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2021-10-21 20:10:26,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 20:10:26,141 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 21 states and 23 transitions. [2021-10-21 20:10:26,142 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-21 20:10:26,142 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 21 states to 21 states and 23 transitions. [2021-10-21 20:10:26,143 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2021-10-21 20:10:26,143 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2021-10-21 20:10:26,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 23 transitions. [2021-10-21 20:10:26,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 20:10:26,143 INFO L681 BuchiCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-10-21 20:10:26,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states and 23 transitions. [2021-10-21 20:10:26,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-10-21 20:10:26,145 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) [2021-10-21 20:10:26,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-10-21 20:10:26,146 INFO L704 BuchiCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-10-21 20:10:26,146 INFO L587 BuchiCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-10-21 20:10:26,146 INFO L425 BuchiCegarLoop]: ======== Iteration 9============ [2021-10-21 20:10:26,146 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 22 transitions. [2021-10-21 20:10:26,146 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-21 20:10:26,147 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 20:10:26,147 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 20:10:26,147 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [7, 7, 1, 1, 1] [2021-10-21 20:10:26,148 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-21 20:10:26,148 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 [2021-10-21 20:10:26,149 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;main_~i~0 := main_#t~nondet5;havoc main_#t~nondet5;call write~int(0, main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4); 504#L17-4 [2021-10-21 20:10:26,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:10:26,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1640296791, now seen corresponding path program 7 times [2021-10-21 20:10:26,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:10:26,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383264611] [2021-10-21 20:10:26,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:26,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:10:26,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:26,240 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:10:26,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:10:26,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383264611] [2021-10-21 20:10:26,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383264611] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:10:26,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426822308] [2021-10-21 20:10:26,241 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 20:10:26,241 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:10:26,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:10:26,244 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:10:26,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-21 20:10:26,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:26,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 20:10:26,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:10:26,375 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:10:26,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426822308] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:10:26,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:10:26,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-10-21 20:10:26,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53286915] [2021-10-21 20:10:26,376 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 20:10:26,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:10:26,377 INFO L82 PathProgramCache]: Analyzing trace with hash 48762, now seen corresponding path program 8 times [2021-10-21 20:10:26,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:10:26,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003673762] [2021-10-21 20:10:26,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:26,378 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:10:26,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:10:26,383 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:10:26,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:10:26,389 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:10:26,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:10:26,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 20:10:26,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-10-21 20:10:26,533 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) [2021-10-21 20:10:26,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:10:26,565 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-10-21 20:10:26,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 20:10:26,565 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 23 states and 25 transitions. [2021-10-21 20:10:26,566 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-21 20:10:26,566 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 23 states to 23 states and 25 transitions. [2021-10-21 20:10:26,567 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2021-10-21 20:10:26,567 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2021-10-21 20:10:26,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 25 transitions. [2021-10-21 20:10:26,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 20:10:26,567 INFO L681 BuchiCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-10-21 20:10:26,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 25 transitions. [2021-10-21 20:10:26,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-10-21 20:10:26,569 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) [2021-10-21 20:10:26,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-10-21 20:10:26,570 INFO L704 BuchiCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-10-21 20:10:26,570 INFO L587 BuchiCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-10-21 20:10:26,570 INFO L425 BuchiCegarLoop]: ======== Iteration 10============ [2021-10-21 20:10:26,570 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states and 24 transitions. [2021-10-21 20:10:26,570 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-21 20:10:26,571 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 20:10:26,571 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 20:10:26,571 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [8, 8, 1, 1, 1] [2021-10-21 20:10:26,572 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-21 20:10:26,572 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 [2021-10-21 20:10:26,572 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;main_~i~0 := main_#t~nondet5;havoc main_#t~nondet5;call write~int(0, main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4); 609#L17-4 [2021-10-21 20:10:26,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:10:26,573 INFO L82 PathProgramCache]: Analyzing trace with hash 72220821, now seen corresponding path program 8 times [2021-10-21 20:10:26,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:10:26,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833034451] [2021-10-21 20:10:26,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:26,573 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:10:26,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:26,659 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:10:26,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:10:26,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833034451] [2021-10-21 20:10:26,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833034451] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:10:26,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468900704] [2021-10-21 20:10:26,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:10:26,660 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:10:26,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:10:26,666 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:10:26,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-21 20:10:26,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:10:26,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:10:26,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-21 20:10:26,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:10:26,813 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:10:26,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468900704] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:10:26,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:10:26,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-10-21 20:10:26,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046778609] [2021-10-21 20:10:26,814 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 20:10:26,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:10:26,815 INFO L82 PathProgramCache]: Analyzing trace with hash 48762, now seen corresponding path program 9 times [2021-10-21 20:10:26,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:10:26,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286125856] [2021-10-21 20:10:26,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:26,815 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:10:26,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:10:26,820 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:10:26,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:10:26,825 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:10:26,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:10:26,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 20:10:26,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-10-21 20:10:26,946 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) [2021-10-21 20:10:26,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:10:26,981 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2021-10-21 20:10:26,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 20:10:26,981 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 27 transitions. [2021-10-21 20:10:26,982 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-21 20:10:26,982 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 25 states and 27 transitions. [2021-10-21 20:10:26,982 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2021-10-21 20:10:26,982 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2021-10-21 20:10:26,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 27 transitions. [2021-10-21 20:10:26,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 20:10:26,983 INFO L681 BuchiCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-10-21 20:10:26,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 27 transitions. [2021-10-21 20:10:26,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-10-21 20:10:26,984 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) [2021-10-21 20:10:26,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-10-21 20:10:26,985 INFO L704 BuchiCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-10-21 20:10:26,985 INFO L587 BuchiCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-10-21 20:10:26,985 INFO L425 BuchiCegarLoop]: ======== Iteration 11============ [2021-10-21 20:10:26,985 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 26 transitions. [2021-10-21 20:10:26,986 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-21 20:10:26,986 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 20:10:26,986 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 20:10:26,986 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [9, 9, 1, 1, 1] [2021-10-21 20:10:26,987 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-21 20:10:26,987 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 [2021-10-21 20:10:26,987 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;main_~i~0 := main_#t~nondet5;havoc main_#t~nondet5;call write~int(0, main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4); 725#L17-4 [2021-10-21 20:10:26,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:10:26,987 INFO L82 PathProgramCache]: Analyzing trace with hash 684734547, now seen corresponding path program 9 times [2021-10-21 20:10:26,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:10:26,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354152081] [2021-10-21 20:10:26,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:26,988 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:10:27,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:27,086 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:10:27,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:10:27,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354152081] [2021-10-21 20:10:27,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354152081] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:10:27,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487943781] [2021-10-21 20:10:27,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:10:27,087 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:10:27,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:10:27,092 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:10:27,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-21 20:10:27,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-10-21 20:10:27,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:10:27,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-21 20:10:27,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:10:27,298 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:10:27,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487943781] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:10:27,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:10:27,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-10-21 20:10:27,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160890851] [2021-10-21 20:10:27,300 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 20:10:27,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:10:27,301 INFO L82 PathProgramCache]: Analyzing trace with hash 48762, now seen corresponding path program 10 times [2021-10-21 20:10:27,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:10:27,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788783300] [2021-10-21 20:10:27,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:27,302 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:10:27,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:10:27,308 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:10:27,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:10:27,322 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:10:27,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:10:27,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 20:10:27,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-10-21 20:10:27,472 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) [2021-10-21 20:10:27,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:10:27,511 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-10-21 20:10:27,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 20:10:27,512 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 28 transitions. [2021-10-21 20:10:27,512 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-21 20:10:27,513 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 26 states and 28 transitions. [2021-10-21 20:10:27,513 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2021-10-21 20:10:27,513 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2021-10-21 20:10:27,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 28 transitions. [2021-10-21 20:10:27,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 20:10:27,513 INFO L681 BuchiCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-10-21 20:10:27,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states and 28 transitions. [2021-10-21 20:10:27,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-21 20:10:27,515 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) [2021-10-21 20:10:27,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-10-21 20:10:27,516 INFO L704 BuchiCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-10-21 20:10:27,516 INFO L587 BuchiCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-10-21 20:10:27,516 INFO L425 BuchiCegarLoop]: ======== Iteration 12============ [2021-10-21 20:10:27,516 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 26 states and 28 transitions. [2021-10-21 20:10:27,517 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-21 20:10:27,517 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 20:10:27,517 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 20:10:27,518 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [10, 10, 1, 1, 1] [2021-10-21 20:10:27,518 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-21 20:10:27,518 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 [2021-10-21 20:10:27,518 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;main_~i~0 := main_#t~nondet5;havoc main_#t~nondet5;call write~int(0, main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4); 851#L17-4 [2021-10-21 20:10:27,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:10:27,518 INFO L82 PathProgramCache]: Analyzing trace with hash 899905681, now seen corresponding path program 10 times [2021-10-21 20:10:27,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:10:27,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110346610] [2021-10-21 20:10:27,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:27,519 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:10:27,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:10:27,533 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:10:27,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:10:27,552 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:10:27,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:10:27,553 INFO L82 PathProgramCache]: Analyzing trace with hash 48762, now seen corresponding path program 11 times [2021-10-21 20:10:27,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:10:27,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935503413] [2021-10-21 20:10:27,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:27,554 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:10:27,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:10:27,559 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:10:27,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:10:27,563 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:10:27,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:10:27,564 INFO L82 PathProgramCache]: Analyzing trace with hash -95699990, now seen corresponding path program 1 times [2021-10-21 20:10:27,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:10:27,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085353277] [2021-10-21 20:10:27,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:27,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:10:27,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:10:27,586 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:10:27,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:10:27,609 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:10:31,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 21.10 08:10:31 BoogieIcfgContainer [2021-10-21 20:10:31,576 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-10-21 20:10:31,576 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 20:10:31,576 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 20:10:31,577 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 20:10:31,577 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:10:21" (3/4) ... [2021-10-21 20:10:31,580 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2021-10-21 20:10:31,665 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 20:10:31,665 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 20:10:31,667 INFO L168 Benchmark]: Toolchain (without parser) took 10959.32 ms. Allocated memory was 79.7 MB in the beginning and 146.8 MB in the end (delta: 67.1 MB). Free memory was 46.3 MB in the beginning and 107.7 MB in the end (delta: -61.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-21 20:10:31,667 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 79.7 MB. Free memory was 58.8 MB in the beginning and 58.8 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:10:31,668 INFO L168 Benchmark]: CACSL2BoogieTranslator took 229.15 ms. Allocated memory was 79.7 MB in the beginning and 100.7 MB in the end (delta: 21.0 MB). Free memory was 46.1 MB in the beginning and 78.0 MB in the end (delta: -31.9 MB). Peak memory consumption was 7.9 MB. Max. memory is 16.1 GB. [2021-10-21 20:10:31,668 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.44 ms. Allocated memory is still 100.7 MB. Free memory was 78.0 MB in the beginning and 76.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:10:31,669 INFO L168 Benchmark]: Boogie Preprocessor took 24.43 ms. Allocated memory is still 100.7 MB. Free memory was 76.6 MB in the beginning and 75.5 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:10:31,669 INFO L168 Benchmark]: RCFGBuilder took 367.49 ms. Allocated memory is still 100.7 MB. Free memory was 75.5 MB in the beginning and 66.5 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 20:10:31,670 INFO L168 Benchmark]: BuchiAutomizer took 10207.01 ms. Allocated memory was 100.7 MB in the beginning and 146.8 MB in the end (delta: 46.1 MB). Free memory was 66.5 MB in the beginning and 109.8 MB in the end (delta: -43.3 MB). Peak memory consumption was 69.8 MB. Max. memory is 16.1 GB. [2021-10-21 20:10:31,670 INFO L168 Benchmark]: Witness Printer took 88.84 ms. Allocated memory is still 146.8 MB. Free memory was 109.8 MB in the beginning and 107.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:10:31,673 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 79.7 MB. Free memory was 58.8 MB in the beginning and 58.8 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 229.15 ms. Allocated memory was 79.7 MB in the beginning and 100.7 MB in the end (delta: 21.0 MB). Free memory was 46.1 MB in the beginning and 78.0 MB in the end (delta: -31.9 MB). Peak memory consumption was 7.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.44 ms. Allocated memory is still 100.7 MB. Free memory was 78.0 MB in the beginning and 76.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.43 ms. Allocated memory is still 100.7 MB. Free memory was 76.6 MB in the beginning and 75.5 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 367.49 ms. Allocated memory is still 100.7 MB. Free memory was 75.5 MB in the beginning and 66.5 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 10207.01 ms. Allocated memory was 100.7 MB in the beginning and 146.8 MB in the end (delta: 46.1 MB). Free memory was 66.5 MB in the beginning and 109.8 MB in the end (delta: -43.3 MB). Peak memory consumption was 69.8 MB. Max. memory is 16.1 GB. * Witness Printer took 88.84 ms. Allocated memory is still 146.8 MB. Free memory was 109.8 MB in the beginning and 107.7 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 10.1s and 12 iterations. TraceHistogramMax:10. Analysis of lassos took 9.4s. Construction of modules took 0.1s. Büchi inclusion checks took 0.3s. Highest rank in rank-based complementation 3. Minimization of det autom 11. Minimization of nondet autom 0. Automata minimization 32.2ms 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, 194.8ms 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: 47ms 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@5eb167b=0, NULL=0, \result=0, NULL=1, n=10, i=9, a=2, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@6e6c0f6a=9, org.eclipse.cdt.internal.core.dom.parser.c.CASTUnaryExpression@2355bf57=0, NULL=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@7b6e83a0=0, a=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@5f4c2695=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTBinaryExpression@3391f37f=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] i = __VERIFIER_nondet_int() [L20] a[i] = 0 End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2021-10-21 20:10:31,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-21 20:10:31,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-21 20:10:32,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-21 20:10:32,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-21 20:10:32,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-21 20:10:32,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-21 20:10:32,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-21 20:10:33,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-10-21 20:10:33,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-10-21 20:10:33,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24363aea-06ff-4799-97d6-76322167bfb6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...