./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-restricted-15/Ex07.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-restricted-15/Ex07.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt --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 f77d0d21d7cb1d6a29608eb65655982c4edaf4ed ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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-4e77c04 [2021-10-13 00:54:36,539 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 00:54:36,541 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 00:54:36,576 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 00:54:36,577 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 00:54:36,579 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 00:54:36,581 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 00:54:36,584 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 00:54:36,587 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 00:54:36,588 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 00:54:36,590 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 00:54:36,591 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 00:54:36,592 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 00:54:36,594 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 00:54:36,596 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 00:54:36,598 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 00:54:36,599 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 00:54:36,601 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 00:54:36,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 00:54:36,606 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 00:54:36,608 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 00:54:36,614 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 00:54:36,616 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 00:54:36,619 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 00:54:36,624 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 00:54:36,630 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 00:54:36,630 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 00:54:36,632 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 00:54:36,633 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 00:54:36,634 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 00:54:36,635 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 00:54:36,636 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 00:54:36,637 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 00:54:36,638 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 00:54:36,640 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 00:54:36,640 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 00:54:36,641 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 00:54:36,641 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 00:54:36,642 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 00:54:36,643 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 00:54:36,644 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 00:54:36,645 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-10-13 00:54:36,673 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 00:54:36,673 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 00:54:36,673 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 00:54:36,674 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 00:54:36,675 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 00:54:36,675 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 00:54:36,676 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 00:54:36,676 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-10-13 00:54:36,676 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-10-13 00:54:36,677 INFO L138 SettingsManager]: * Use old map elimination=false [2021-10-13 00:54:36,681 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-10-13 00:54:36,681 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-10-13 00:54:36,682 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-10-13 00:54:36,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 00:54:36,682 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 00:54:36,683 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 00:54:36,683 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 00:54:36,683 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-10-13 00:54:36,684 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-10-13 00:54:36,684 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-10-13 00:54:36,684 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 00:54:36,684 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-10-13 00:54:36,685 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 00:54:36,685 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-10-13 00:54:36,685 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 00:54:36,686 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 00:54:36,688 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 00:54:36,688 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 00:54:36,688 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 00:54:36,690 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-10-13 00:54:36,691 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_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f77d0d21d7cb1d6a29608eb65655982c4edaf4ed [2021-10-13 00:54:36,963 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 00:54:37,007 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 00:54:37,011 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 00:54:37,013 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 00:54:37,014 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 00:54:37,015 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/termination-restricted-15/Ex07.c [2021-10-13 00:54:37,092 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/data/3caa31b05/3e423ea2b850449fbb968e6d7ab7b963/FLAG7a6861faf [2021-10-13 00:54:37,635 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 00:54:37,636 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/sv-benchmarks/c/termination-restricted-15/Ex07.c [2021-10-13 00:54:37,644 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/data/3caa31b05/3e423ea2b850449fbb968e6d7ab7b963/FLAG7a6861faf [2021-10-13 00:54:38,000 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/data/3caa31b05/3e423ea2b850449fbb968e6d7ab7b963 [2021-10-13 00:54:38,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 00:54:38,004 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 00:54:38,022 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 00:54:38,022 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 00:54:38,026 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 00:54:38,027 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:54:38" (1/1) ... [2021-10-13 00:54:38,028 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5aa25065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:38, skipping insertion in model container [2021-10-13 00:54:38,029 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:54:38" (1/1) ... [2021-10-13 00:54:38,036 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 00:54:38,048 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 00:54:38,240 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:54:38,251 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 00:54:38,265 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:54:38,277 INFO L208 MainTranslator]: Completed translation [2021-10-13 00:54:38,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:38 WrapperNode [2021-10-13 00:54:38,278 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 00:54:38,279 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 00:54:38,279 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 00:54:38,280 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 00:54:38,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:38" (1/1) ... [2021-10-13 00:54:38,293 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:38" (1/1) ... [2021-10-13 00:54:38,313 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 00:54:38,314 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 00:54:38,314 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 00:54:38,314 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 00:54:38,324 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:38" (1/1) ... [2021-10-13 00:54:38,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:38" (1/1) ... [2021-10-13 00:54:38,325 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:38" (1/1) ... [2021-10-13 00:54:38,326 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:38" (1/1) ... [2021-10-13 00:54:38,328 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:38" (1/1) ... [2021-10-13 00:54:38,332 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:38" (1/1) ... [2021-10-13 00:54:38,333 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:38" (1/1) ... [2021-10-13 00:54:38,335 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 00:54:38,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 00:54:38,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 00:54:38,336 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 00:54:38,338 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:38" (1/1) ... [2021-10-13 00:54:38,347 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:54:38,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:54:38,374 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:54:38,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-10-13 00:54:38,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 00:54:38,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 00:54:38,541 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 00:54:38,541 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-10-13 00:54:38,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:54:38 BoogieIcfgContainer [2021-10-13 00:54:38,544 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 00:54:38,545 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-10-13 00:54:38,545 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-10-13 00:54:38,548 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-10-13 00:54:38,549 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-13 00:54:38,549 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 13.10 12:54:38" (1/3) ... [2021-10-13 00:54:38,550 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@56c6f89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 13.10 12:54:38, skipping insertion in model container [2021-10-13 00:54:38,551 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-13 00:54:38,551 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:38" (2/3) ... [2021-10-13 00:54:38,551 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@56c6f89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 13.10 12:54:38, skipping insertion in model container [2021-10-13 00:54:38,551 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-13 00:54:38,552 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:54:38" (3/3) ... [2021-10-13 00:54:38,553 INFO L389 chiAutomizerObserver]: Analyzing ICFG Ex07.c [2021-10-13 00:54:38,605 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-10-13 00:54:38,605 INFO L360 BuchiCegarLoop]: Hoare is false [2021-10-13 00:54:38,606 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-10-13 00:54:38,606 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-13 00:54:38,606 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-13 00:54:38,606 INFO L364 BuchiCegarLoop]: Difference is false [2021-10-13 00:54:38,606 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-13 00:54:38,606 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-10-13 00:54:38,622 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 8 states, 7 states have (on average 1.5714285714285714) 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) [2021-10-13 00:54:38,641 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-13 00:54:38,641 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:54:38,641 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:54:38,646 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-10-13 00:54:38,646 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-13 00:54:38,646 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-10-13 00:54:38,646 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 8 states, 7 states have (on average 1.5714285714285714) 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) [2021-10-13 00:54:38,647 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-13 00:54:38,647 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:54:38,647 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:54:38,648 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-10-13 00:54:38,648 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-13 00:54:38,657 INFO L791 eck$LassoCheckResult]: Stem: 7#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_~i~0;havoc main_~i~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0; 4#L13-1true [2021-10-13 00:54:38,657 INFO L793 eck$LassoCheckResult]: Loop: 4#L13-1true assume !!(0 != ~unnamed0~0~true); 8#L10true assume main_~i~0 > 0;main_~i~0 := main_~i~0 - 1; 6#L10-2true assume main_~i~0 < 0;main_~i~0 := 1 + main_~i~0; 4#L13-1true [2021-10-13 00:54:38,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:54:38,663 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2021-10-13 00:54:38,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:54:38,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990691979] [2021-10-13 00:54:38,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:38,672 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:54:38,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:54:38,751 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:54:38,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:54:38,792 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:54:38,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:54:38,799 INFO L82 PathProgramCache]: Analyzing trace with hash 39823, now seen corresponding path program 1 times [2021-10-13 00:54:38,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:54:38,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539661907] [2021-10-13 00:54:38,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:38,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:54:38,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:38,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:54:38,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:54:38,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539661907] [2021-10-13 00:54:38,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539661907] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:54:38,940 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:54:38,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 00:54:38,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973458841] [2021-10-13 00:54:38,946 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-13 00:54:38,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:54:38,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 00:54:38,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:54:38,968 INFO L87 Difference]: Start difference. First operand has 8 states, 7 states have (on average 1.5714285714285714) 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) 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) [2021-10-13 00:54:39,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:54:39,032 INFO L93 Difference]: Finished difference Result 7 states and 10 transitions. [2021-10-13 00:54:39,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 00:54:39,035 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 7 states and 10 transitions. [2021-10-13 00:54:39,035 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-10-13 00:54:39,039 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 7 states to 7 states and 10 transitions. [2021-10-13 00:54:39,040 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2021-10-13 00:54:39,040 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2021-10-13 00:54:39,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 10 transitions. [2021-10-13 00:54:39,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 00:54:39,042 INFO L681 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2021-10-13 00:54:39,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 10 transitions. [2021-10-13 00:54:39,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-10-13 00:54:39,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 1.4285714285714286) 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) [2021-10-13 00:54:39,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 10 transitions. [2021-10-13 00:54:39,084 INFO L704 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2021-10-13 00:54:39,100 INFO L587 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2021-10-13 00:54:39,101 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-10-13 00:54:39,101 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 10 transitions. [2021-10-13 00:54:39,101 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-10-13 00:54:39,102 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:54:39,102 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:54:39,102 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-10-13 00:54:39,116 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-13 00:54:39,117 INFO L791 eck$LassoCheckResult]: Stem: 28#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0;havoc main_~i~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0; 24#L13-1 [2021-10-13 00:54:39,117 INFO L793 eck$LassoCheckResult]: Loop: 24#L13-1 assume !!(0 != ~unnamed0~0~true); 25#L10 assume !(main_~i~0 > 0); 29#L10-2 assume main_~i~0 < 0;main_~i~0 := 1 + main_~i~0; 24#L13-1 [2021-10-13 00:54:39,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:54:39,118 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 2 times [2021-10-13 00:54:39,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:54:39,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175023667] [2021-10-13 00:54:39,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:39,119 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:54:39,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:54:39,124 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:54:39,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:54:39,135 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:54:39,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:54:39,136 INFO L82 PathProgramCache]: Analyzing trace with hash 39885, now seen corresponding path program 1 times [2021-10-13 00:54:39,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:54:39,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071504974] [2021-10-13 00:54:39,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:39,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:54:39,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:54:39,156 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:54:39,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:54:39,161 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:54:39,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:54:39,163 INFO L82 PathProgramCache]: Analyzing trace with hash 963406, now seen corresponding path program 1 times [2021-10-13 00:54:39,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:54:39,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470225829] [2021-10-13 00:54:39,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:39,164 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:54:39,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:54:39,176 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:54:39,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:54:39,182 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:54:39,259 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:54:39,260 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:54:39,261 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:54:39,261 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:54:39,261 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-13 00:54:39,261 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:54:39,267 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:54:39,267 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:54:39,267 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ex07.c_Iteration2_Loop [2021-10-13 00:54:39,267 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:54:39,267 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:54:39,288 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:54:39,295 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:54:39,301 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:54:39,373 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:54:39,373 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-13 00:54:39,376 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:54:39,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:54:39,378 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:54:39,385 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:54:39,385 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:54:39,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-10-13 00:54:39,422 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:54:39,423 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_1=1} Honda state: {v_rep~unnamed0~0~true_1=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 00:54:39,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-10-13 00:54:39,462 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:54:39,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:54:39,463 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:54:39,471 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:54:39,471 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:54:39,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-10-13 00:54:39,490 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:54:39,490 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_1=0} Honda state: {v_rep~unnamed0~0~false_1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 00:54:39,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-10-13 00:54:39,512 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:54:39,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:54:39,513 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:54:39,521 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:54:39,522 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:54:39,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-10-13 00:54:39,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-10-13 00:54:39,574 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:54:39,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:54:39,575 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:54:39,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-10-13 00:54:39,583 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-13 00:54:39,583 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:54:39,645 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-13 00:54:39,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-10-13 00:54:39,652 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:54:39,653 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:54:39,653 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:54:39,653 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:54:39,653 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-13 00:54:39,653 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:54:39,653 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:54:39,653 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:54:39,653 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ex07.c_Iteration2_Loop [2021-10-13 00:54:39,653 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:54:39,653 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:54:39,655 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:54:39,659 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:54:39,670 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:54:39,726 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:54:39,731 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-13 00:54:39,733 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:54:39,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:54:39,734 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:54:39,741 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 [2021-10-13 00:54:39,752 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:54:39,752 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:54:39,753 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:54:39,753 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:54:39,759 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-13 00:54:39,759 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-13 00:54:39,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-10-13 00:54:39,787 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:54:39,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-10-13 00:54:39,809 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:54:39,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:54:39,810 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:54:39,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-10-13 00:54:39,812 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 [2021-10-13 00:54:39,819 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:54:39,819 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:54:39,820 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:54:39,820 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:54:39,820 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:54:39,822 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:54:39,822 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:54:39,836 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-13 00:54:39,839 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-10-13 00:54:39,839 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-10-13 00:54:39,841 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:54:39,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:54:39,845 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:54:39,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-10-13 00:54:39,889 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-13 00:54:39,889 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-13 00:54:39,889 INFO L513 LassoAnalysis]: Proved termination. [2021-10-13 00:54:39,890 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = -1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2021-10-13 00:54:39,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-10-13 00:54:39,914 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-13 00:54:39,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:54:39,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:39,964 WARN L261 TraceCheckSpWp]: Trace formula consists of 4 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 00:54:39,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:54:39,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:39,976 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 00:54:39,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:54:39,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:54:40,004 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2021-10-13 00:54:40,005 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5 Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:54:40,056 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5. Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 16 states and 22 transitions. Complement of second has 5 states. [2021-10-13 00:54:40,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-10-13 00:54:40,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:54:40,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 6 transitions. [2021-10-13 00:54:40,061 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 1 letters. Loop has 3 letters. [2021-10-13 00:54:40,062 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:54:40,062 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 4 letters. Loop has 3 letters. [2021-10-13 00:54:40,063 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:54:40,063 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 1 letters. Loop has 6 letters. [2021-10-13 00:54:40,063 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:54:40,064 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 16 states and 22 transitions. [2021-10-13 00:54:40,067 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-10-13 00:54:40,074 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 16 states to 13 states and 18 transitions. [2021-10-13 00:54:40,074 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2021-10-13 00:54:40,074 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2021-10-13 00:54:40,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 18 transitions. [2021-10-13 00:54:40,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 00:54:40,075 INFO L681 BuchiCegarLoop]: Abstraction has 13 states and 18 transitions. [2021-10-13 00:54:40,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 18 transitions. [2021-10-13 00:54:40,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 8. [2021-10-13 00:54:40,078 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) [2021-10-13 00:54:40,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 11 transitions. [2021-10-13 00:54:40,085 INFO L704 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2021-10-13 00:54:40,085 INFO L587 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2021-10-13 00:54:40,085 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-10-13 00:54:40,085 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states and 11 transitions. [2021-10-13 00:54:40,087 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-13 00:54:40,087 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:54:40,087 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:54:40,087 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-13 00:54:40,087 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-13 00:54:40,088 INFO L791 eck$LassoCheckResult]: Stem: 85#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0;havoc main_~i~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0; 86#L13-1 assume !!(0 != ~unnamed0~0~true); 83#L10 [2021-10-13 00:54:40,088 INFO L793 eck$LassoCheckResult]: Loop: 83#L10 assume main_~i~0 > 0;main_~i~0 := main_~i~0 - 1; 79#L10-2 assume !(main_~i~0 < 0); 80#L13-1 assume !!(0 != ~unnamed0~0~true); 83#L10 [2021-10-13 00:54:40,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:54:40,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2021-10-13 00:54:40,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:54:40,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797810972] [2021-10-13 00:54:40,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:40,090 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:54:40,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:54:40,107 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:54:40,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:54:40,110 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:54:40,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:54:40,111 INFO L82 PathProgramCache]: Analyzing trace with hash 42945, now seen corresponding path program 1 times [2021-10-13 00:54:40,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:54:40,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726786477] [2021-10-13 00:54:40,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:40,112 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:54:40,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:54:40,118 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:54:40,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:54:40,130 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:54:40,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:54:40,131 INFO L82 PathProgramCache]: Analyzing trace with hash 29863736, now seen corresponding path program 1 times [2021-10-13 00:54:40,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:54:40,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679390127] [2021-10-13 00:54:40,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:40,132 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:54:40,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:54:40,142 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:54:40,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:54:40,163 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:54:40,220 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:54:40,220 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:54:40,220 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:54:40,220 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:54:40,221 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-13 00:54:40,221 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:54:40,221 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:54:40,221 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:54:40,221 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ex07.c_Iteration3_Loop [2021-10-13 00:54:40,221 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:54:40,221 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:54:40,223 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:54:40,228 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:54:40,236 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:54:40,284 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:54:40,284 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-13 00:54:40,285 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:54:40,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:54:40,289 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:54:40,294 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:54:40,294 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:54:40,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-10-13 00:54:40,327 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:54:40,327 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_3=0} Honda state: {v_rep~unnamed0~0~false_3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 00:54:40,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-10-13 00:54:40,365 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:54:40,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:54:40,369 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:54:40,376 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:54:40,376 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:54:40,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-10-13 00:54:40,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-10-13 00:54:40,426 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:54:40,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:54:40,427 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:54:40,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-10-13 00:54:40,432 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-13 00:54:40,432 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:54:40,473 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-13 00:54:40,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-10-13 00:54:40,476 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:54:40,476 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:54:40,476 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:54:40,476 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:54:40,477 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-13 00:54:40,477 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:54:40,477 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:54:40,477 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:54:40,477 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ex07.c_Iteration3_Loop [2021-10-13 00:54:40,477 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:54:40,477 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:54:40,479 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:54:40,526 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:54:40,529 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:54:40,568 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:54:40,568 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-13 00:54:40,568 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:54:40,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:54:40,575 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:54:40,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-10-13 00:54:40,588 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 [2021-10-13 00:54:40,597 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:54:40,597 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:54:40,597 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:54:40,598 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:54:40,598 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:54:40,599 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:54:40,599 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:54:40,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-10-13 00:54:40,608 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-13 00:54:40,611 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-13 00:54:40,611 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-13 00:54:40,611 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:54:40,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:54:40,612 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:54:40,618 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-13 00:54:40,618 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-13 00:54:40,618 INFO L513 LassoAnalysis]: Proved termination. [2021-10-13 00:54:40,619 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2021-10-13 00:54:40,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-10-13 00:54:40,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-10-13 00:54:40,649 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-13 00:54:40,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:54:40,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:40,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 00:54:40,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:54:40,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:40,690 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 00:54:40,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:54:40,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:54:40,786 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 [2021-10-13 00:54:40,786 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 8 states and 11 transitions. cyclomatic complexity: 5 Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:54:40,807 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 8 states and 11 transitions. cyclomatic complexity: 5. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 21 states and 28 transitions. Complement of second has 5 states. [2021-10-13 00:54:40,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-10-13 00:54:40,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:54:40,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 9 transitions. [2021-10-13 00:54:40,809 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 2 letters. Loop has 3 letters. [2021-10-13 00:54:40,809 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:54:40,810 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 5 letters. Loop has 3 letters. [2021-10-13 00:54:40,810 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:54:40,810 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 2 letters. Loop has 6 letters. [2021-10-13 00:54:40,811 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:54:40,811 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 21 states and 28 transitions. [2021-10-13 00:54:40,814 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-10-13 00:54:40,816 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 21 states to 20 states and 27 transitions. [2021-10-13 00:54:40,816 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2021-10-13 00:54:40,817 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2021-10-13 00:54:40,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 27 transitions. [2021-10-13 00:54:40,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 00:54:40,818 INFO L681 BuchiCegarLoop]: Abstraction has 20 states and 27 transitions. [2021-10-13 00:54:40,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states and 27 transitions. [2021-10-13 00:54:40,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2021-10-13 00:54:40,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:54:40,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 23 transitions. [2021-10-13 00:54:40,824 INFO L704 BuchiCegarLoop]: Abstraction has 16 states and 23 transitions. [2021-10-13 00:54:40,824 INFO L587 BuchiCegarLoop]: Abstraction has 16 states and 23 transitions. [2021-10-13 00:54:40,824 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-10-13 00:54:40,825 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states and 23 transitions. [2021-10-13 00:54:40,828 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-10-13 00:54:40,828 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:54:40,828 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:54:40,829 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-10-13 00:54:40,829 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-13 00:54:40,829 INFO L791 eck$LassoCheckResult]: Stem: 151#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0;havoc main_~i~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0; 152#L13-1 assume !!(0 != ~unnamed0~0~true); 158#L10 assume !(main_~i~0 > 0); 144#L10-2 [2021-10-13 00:54:40,829 INFO L793 eck$LassoCheckResult]: Loop: 144#L10-2 assume !(main_~i~0 < 0); 145#L13-1 assume !!(0 != ~unnamed0~0~true); 153#L10 assume !(main_~i~0 > 0); 144#L10-2 [2021-10-13 00:54:40,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:54:40,830 INFO L82 PathProgramCache]: Analyzing trace with hash 31077, now seen corresponding path program 1 times [2021-10-13 00:54:40,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:54:40,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678413183] [2021-10-13 00:54:40,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:40,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:54:40,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:54:40,844 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:54:40,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:54:40,847 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:54:40,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:54:40,848 INFO L82 PathProgramCache]: Analyzing trace with hash 50297, now seen corresponding path program 1 times [2021-10-13 00:54:40,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:54:40,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305376956] [2021-10-13 00:54:40,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:40,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:54:40,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:54:40,852 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:54:40,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:54:40,859 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:54:40,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:54:40,860 INFO L82 PathProgramCache]: Analyzing trace with hash 925835413, now seen corresponding path program 1 times [2021-10-13 00:54:40,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:54:40,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449628229] [2021-10-13 00:54:40,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:40,860 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:54:40,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:54:40,871 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:54:40,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:54:40,879 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:54:40,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 13.10 12:54:40 BoogieIcfgContainer [2021-10-13 00:54:40,935 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-10-13 00:54:40,935 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 00:54:40,935 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 00:54:40,935 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 00:54:40,936 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:54:38" (3/4) ... [2021-10-13 00:54:40,938 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2021-10-13 00:54:40,962 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/witness.graphml [2021-10-13 00:54:40,962 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 00:54:40,964 INFO L168 Benchmark]: Toolchain (without parser) took 2958.91 ms. Allocated memory was 90.2 MB in the beginning and 113.2 MB in the end (delta: 23.1 MB). Free memory was 53.6 MB in the beginning and 71.9 MB in the end (delta: -18.2 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. [2021-10-13 00:54:40,965 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 90.2 MB. Free memory is still 70.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:54:40,965 INFO L168 Benchmark]: CACSL2BoogieTranslator took 256.06 ms. Allocated memory was 90.2 MB in the beginning and 113.2 MB in the end (delta: 23.1 MB). Free memory was 53.4 MB in the beginning and 90.5 MB in the end (delta: -37.0 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. [2021-10-13 00:54:40,966 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.86 ms. Allocated memory is still 113.2 MB. Free memory was 90.5 MB in the beginning and 89.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:54:40,966 INFO L168 Benchmark]: Boogie Preprocessor took 21.32 ms. Allocated memory is still 113.2 MB. Free memory was 89.0 MB in the beginning and 88.4 MB in the end (delta: 672.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:54:40,967 INFO L168 Benchmark]: RCFGBuilder took 208.03 ms. Allocated memory is still 113.2 MB. Free memory was 88.1 MB in the beginning and 80.6 MB in the end (delta: 7.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-13 00:54:40,967 INFO L168 Benchmark]: BuchiAutomizer took 2389.91 ms. Allocated memory is still 113.2 MB. Free memory was 80.6 MB in the beginning and 73.5 MB in the end (delta: 7.1 MB). Peak memory consumption was 10.0 MB. Max. memory is 16.1 GB. [2021-10-13 00:54:40,968 INFO L168 Benchmark]: Witness Printer took 27.41 ms. Allocated memory is still 113.2 MB. Free memory was 73.5 MB in the beginning and 71.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:54:40,971 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 90.2 MB. Free memory is still 70.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 256.06 ms. Allocated memory was 90.2 MB in the beginning and 113.2 MB in the end (delta: 23.1 MB). Free memory was 53.4 MB in the beginning and 90.5 MB in the end (delta: -37.0 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.86 ms. Allocated memory is still 113.2 MB. Free memory was 90.5 MB in the beginning and 89.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.32 ms. Allocated memory is still 113.2 MB. Free memory was 89.0 MB in the beginning and 88.4 MB in the end (delta: 672.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 208.03 ms. Allocated memory is still 113.2 MB. Free memory was 88.1 MB in the beginning and 80.6 MB in the end (delta: 7.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 2389.91 ms. Allocated memory is still 113.2 MB. Free memory was 80.6 MB in the beginning and 73.5 MB in the end (delta: 7.1 MB). Peak memory consumption was 10.0 MB. Max. memory is 16.1 GB. * Witness Printer took 27.41 ms. Allocated memory is still 113.2 MB. Free memory was 73.5 MB in the beginning and 71.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 3 terminating modules (1 trivial, 2 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function -1 * i and consists of 3 locations. One deterministic module has affine ranking function i and consists of 3 locations. 1 modules have a trivial ranking function, the largest among these consists of 3 locations. The remainder module has 16 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 2.3s and 4 iterations. TraceHistogramMax:1. Analysis of lassos took 1.7s. Construction of modules took 0.0s. Büchi inclusion checks took 0.3s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 2. Automata minimization 27.4ms AutomataMinimizationTime, 3 MinimizatonAttempts, 9 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 16 states and ocurred in iteration 3. Nontrivial modules had stage [2, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 11 SDtfs, 10 SDslu, 3 SDs, 0 SdLazy, 22 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 66.8ms Time LassoAnalysisResults: nont1 unkn0 SFLI1 SFLT2 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital10 mio100 ax220 hnf100 lsp45 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq160 hnf93 smp100 dnf100 smp100 tf113 neg100 sie111 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 55ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 3 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 2 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.3s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 13]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {} State at position 1 is {org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@584e38d8=0, \result=0, i=0} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 9]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L6] int i; [L7] i = __VERIFIER_nondet_int() [L9] COND TRUE \read(true) [L10] COND FALSE !(i > 0) Loop: [L13] COND FALSE !(i < 0) [L9] COND TRUE \read(true) [L10] COND FALSE !(i > 0) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2021-10-13 00:54:41,004 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Ended with exit code 0 [2021-10-13 00:54:41,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8583161c-f70e-4c7c-a5a6-55adbe69df10/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...