./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-restricted-15/DivMinus2.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_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/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_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-restricted-15/DivMinus2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/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_a40d1ec6-aa29-4062-a36b-7347d686d917/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 4113f10404cd50c48db8fb998633f502f8a0b01a ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 00:58:45,102 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 00:58:45,114 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 00:58:45,182 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 00:58:45,183 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 00:58:45,188 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 00:58:45,191 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 00:58:45,195 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 00:58:45,198 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 00:58:45,205 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 00:58:45,206 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 00:58:45,209 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 00:58:45,209 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 00:58:45,213 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 00:58:45,215 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 00:58:45,220 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 00:58:45,223 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 00:58:45,224 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 00:58:45,227 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 00:58:45,236 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 00:58:45,238 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 00:58:45,240 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 00:58:45,244 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 00:58:45,246 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 00:58:45,257 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 00:58:45,258 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 00:58:45,258 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 00:58:45,261 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 00:58:45,262 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 00:58:45,264 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 00:58:45,264 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 00:58:45,266 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 00:58:45,268 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 00:58:45,270 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 00:58:45,272 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 00:58:45,273 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 00:58:45,274 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 00:58:45,274 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 00:58:45,274 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 00:58:45,276 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 00:58:45,276 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 00:58:45,278 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-10-13 00:58:45,338 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 00:58:45,341 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 00:58:45,342 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 00:58:45,342 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 00:58:45,344 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 00:58:45,344 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 00:58:45,344 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 00:58:45,345 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-10-13 00:58:45,345 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-10-13 00:58:45,345 INFO L138 SettingsManager]: * Use old map elimination=false [2021-10-13 00:58:45,346 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-10-13 00:58:45,347 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-10-13 00:58:45,347 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-10-13 00:58:45,347 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 00:58:45,347 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 00:58:45,347 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 00:58:45,347 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 00:58:45,348 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-10-13 00:58:45,348 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-10-13 00:58:45,348 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-10-13 00:58:45,348 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 00:58:45,349 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-10-13 00:58:45,349 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 00:58:45,349 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-10-13 00:58:45,349 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 00:58:45,350 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 00:58:45,350 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 00:58:45,350 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 00:58:45,351 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 00:58:45,352 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-10-13 00:58:45,352 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_a40d1ec6-aa29-4062-a36b-7347d686d917/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4113f10404cd50c48db8fb998633f502f8a0b01a [2021-10-13 00:58:45,698 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 00:58:45,732 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 00:58:45,735 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 00:58:45,737 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 00:58:45,738 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 00:58:45,739 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/termination-restricted-15/DivMinus2.c [2021-10-13 00:58:45,832 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/data/c6a07e789/b79807542bb74ccbabc58eea22fcf090/FLAG704ab94b9 [2021-10-13 00:58:46,457 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 00:58:46,458 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/sv-benchmarks/c/termination-restricted-15/DivMinus2.c [2021-10-13 00:58:46,472 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/data/c6a07e789/b79807542bb74ccbabc58eea22fcf090/FLAG704ab94b9 [2021-10-13 00:58:46,781 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/data/c6a07e789/b79807542bb74ccbabc58eea22fcf090 [2021-10-13 00:58:46,784 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 00:58:46,786 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 00:58:46,788 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 00:58:46,788 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 00:58:46,807 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 00:58:46,808 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:58:46" (1/1) ... [2021-10-13 00:58:46,810 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@340b15ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:58:46, skipping insertion in model container [2021-10-13 00:58:46,810 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:58:46" (1/1) ... [2021-10-13 00:58:46,818 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 00:58:46,833 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 00:58:47,021 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:58:47,051 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 00:58:47,068 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:58:47,083 INFO L208 MainTranslator]: Completed translation [2021-10-13 00:58:47,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:58:47 WrapperNode [2021-10-13 00:58:47,084 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 00:58:47,086 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 00:58:47,086 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 00:58:47,086 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 00:58:47,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:58:47" (1/1) ... [2021-10-13 00:58:47,104 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:58:47" (1/1) ... [2021-10-13 00:58:47,129 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 00:58:47,131 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 00:58:47,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 00:58:47,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 00:58:47,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:58:47" (1/1) ... [2021-10-13 00:58:47,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:58:47" (1/1) ... [2021-10-13 00:58:47,142 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:58:47" (1/1) ... [2021-10-13 00:58:47,142 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:58:47" (1/1) ... [2021-10-13 00:58:47,145 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:58:47" (1/1) ... [2021-10-13 00:58:47,150 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:58:47" (1/1) ... [2021-10-13 00:58:47,151 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:58:47" (1/1) ... [2021-10-13 00:58:47,152 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 00:58:47,153 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 00:58:47,153 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 00:58:47,153 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 00:58:47,157 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:58:47" (1/1) ... [2021-10-13 00:58:47,166 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:58:47,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:47,200 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:58:47,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-10-13 00:58:47,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 00:58:47,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 00:58:47,419 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 00:58:47,419 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-13 00:58:47,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:58:47 BoogieIcfgContainer [2021-10-13 00:58:47,421 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 00:58:47,422 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-10-13 00:58:47,423 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-10-13 00:58:47,426 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-10-13 00:58:47,426 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-13 00:58:47,426 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 13.10 12:58:46" (1/3) ... [2021-10-13 00:58:47,428 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@42427f94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 13.10 12:58:47, skipping insertion in model container [2021-10-13 00:58:47,428 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-13 00:58:47,428 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:58:47" (2/3) ... [2021-10-13 00:58:47,429 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@42427f94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 13.10 12:58:47, skipping insertion in model container [2021-10-13 00:58:47,429 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-13 00:58:47,429 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:58:47" (3/3) ... [2021-10-13 00:58:47,431 INFO L389 chiAutomizerObserver]: Analyzing ICFG DivMinus2.c [2021-10-13 00:58:47,489 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-10-13 00:58:47,489 INFO L360 BuchiCegarLoop]: Hoare is false [2021-10-13 00:58:47,489 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-10-13 00:58:47,490 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-13 00:58:47,490 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-13 00:58:47,490 INFO L364 BuchiCegarLoop]: Difference is false [2021-10-13 00:58:47,490 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-13 00:58:47,490 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-10-13 00:58:47,508 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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 00:58:47,531 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-10-13 00:58:47,531 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:58:47,531 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:58:47,538 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-10-13 00:58:47,539 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-13 00:58:47,539 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-10-13 00:58:47,539 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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 00:58:47,541 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-10-13 00:58:47,541 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:58:47,541 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:58:47,541 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-10-13 00:58:47,542 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-13 00:58:47,550 INFO L791 eck$LassoCheckResult]: Stem: 6#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~ytmp~0, main_~res~0;havoc main_~x~0;havoc main_~y~0;havoc main_~ytmp~0;havoc main_~res~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~res~0 := 0; 9#L14-2true [2021-10-13 00:58:47,551 INFO L793 eck$LassoCheckResult]: Loop: 9#L14-2true assume !!(main_~x~0 >= main_~y~0 && main_~y~0 > 0);main_~ytmp~0 := main_~y~0; 4#L17-2true assume !(0 != main_~ytmp~0); 8#L16-2true main_~res~0 := 1 + main_~res~0; 9#L14-2true [2021-10-13 00:58:47,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:58:47,558 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2021-10-13 00:58:47,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:58:47,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175554054] [2021-10-13 00:58:47,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:58:47,572 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:58:47,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:58:47,668 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:58:47,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:58:47,692 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:58:47,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:58:47,697 INFO L82 PathProgramCache]: Analyzing trace with hash 39957, now seen corresponding path program 1 times [2021-10-13 00:58:47,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:58:47,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24502898] [2021-10-13 00:58:47,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:58:47,698 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:58:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:58:47,775 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 00:58:47,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:58:47,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24502898] [2021-10-13 00:58:47,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24502898] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:58:47,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:58:47,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 00:58:47,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072234132] [2021-10-13 00:58:47,785 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-13 00:58:47,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:58:47,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 00:58:47,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:58:47,837 INFO L87 Difference]: Start difference. First operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 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 00:58:47,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:58:47,879 INFO L93 Difference]: Finished difference Result 11 states and 13 transitions. [2021-10-13 00:58:47,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 00:58:47,882 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 13 transitions. [2021-10-13 00:58:47,883 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2021-10-13 00:58:47,887 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 7 states and 9 transitions. [2021-10-13 00:58:47,889 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2021-10-13 00:58:47,889 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2021-10-13 00:58:47,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 9 transitions. [2021-10-13 00:58:47,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 00:58:47,890 INFO L681 BuchiCegarLoop]: Abstraction has 7 states and 9 transitions. [2021-10-13 00:58:47,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 9 transitions. [2021-10-13 00:58:47,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-10-13 00:58:47,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 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 00:58:47,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 9 transitions. [2021-10-13 00:58:47,922 INFO L704 BuchiCegarLoop]: Abstraction has 7 states and 9 transitions. [2021-10-13 00:58:47,922 INFO L587 BuchiCegarLoop]: Abstraction has 7 states and 9 transitions. [2021-10-13 00:58:47,922 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-10-13 00:58:47,922 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 9 transitions. [2021-10-13 00:58:47,923 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2021-10-13 00:58:47,923 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:58:47,924 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:58:47,924 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-10-13 00:58:47,924 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2021-10-13 00:58:47,925 INFO L791 eck$LassoCheckResult]: Stem: 32#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~ytmp~0, main_~res~0;havoc main_~x~0;havoc main_~y~0;havoc main_~ytmp~0;havoc main_~res~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~res~0 := 0; 33#L14-2 [2021-10-13 00:58:47,925 INFO L793 eck$LassoCheckResult]: Loop: 33#L14-2 assume !!(main_~x~0 >= main_~y~0 && main_~y~0 > 0);main_~ytmp~0 := main_~y~0; 29#L17-2 assume !!(0 != main_~ytmp~0); 30#L17 assume main_~ytmp~0 > 0;main_~ytmp~0 := main_~ytmp~0 - 1;main_~x~0 := main_~x~0 - 1; 31#L17-2 assume !(0 != main_~ytmp~0); 34#L16-2 main_~res~0 := 1 + main_~res~0; 33#L14-2 [2021-10-13 00:58:47,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:58:47,926 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 2 times [2021-10-13 00:58:47,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:58:47,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930191074] [2021-10-13 00:58:47,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:58:47,928 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:58:47,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:58:47,934 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:58:47,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:58:47,939 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:58:47,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:58:47,940 INFO L82 PathProgramCache]: Analyzing trace with hash 38452088, now seen corresponding path program 1 times [2021-10-13 00:58:47,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:58:47,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15358536] [2021-10-13 00:58:47,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:58:47,942 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:58:47,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:58:47,954 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:58:47,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:58:47,965 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:58:47,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:58:47,966 INFO L82 PathProgramCache]: Analyzing trace with hash 925955769, now seen corresponding path program 1 times [2021-10-13 00:58:47,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:58:47,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931383584] [2021-10-13 00:58:47,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:58:47,968 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:58:47,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:58:47,996 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:58:48,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:58:48,023 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:58:48,159 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:58:48,160 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:58:48,160 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:58:48,160 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:58:48,161 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-13 00:58:48,161 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:58:48,161 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:58:48,161 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:58:48,162 INFO L133 ssoRankerPreferences]: Filename of dumped script: DivMinus2.c_Iteration2_Loop [2021-10-13 00:58:48,162 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:58:48,162 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:58:48,183 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 00:58:48,192 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 00:58:48,196 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 00:58:48,201 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 00:58:48,307 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:58:48,308 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-13 00:58:48,323 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:58:48,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:48,340 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:58:48,353 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:58:48,353 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:58:48,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-10-13 00:58:48,380 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:58:48,380 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 00:58:48,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-10-13 00:58:48,408 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:58:48,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:48,410 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:58:48,417 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:58:48,417 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:58:48,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-10-13 00:58:48,439 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:58:48,439 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 00:58:48,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-10-13 00:58:48,484 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:58:48,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:48,486 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:58:48,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-10-13 00:58:48,508 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:58:48,508 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:58:48,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Ended with exit code 0 [2021-10-13 00:58:48,584 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:58:48,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:48,587 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:58:48,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-10-13 00:58:48,597 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-13 00:58:48,597 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:58:48,636 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:58:48,636 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~res~0=0} Honda state: {ULTIMATE.start_main_~res~0=0} Generalized eigenvectors: [{ULTIMATE.start_main_~res~0=-2}, {ULTIMATE.start_main_~res~0=6}, {ULTIMATE.start_main_~res~0=-3}] Lambdas: [4, 1, 1] Nus: [1, 0] [2021-10-13 00:58:48,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-10-13 00:58:48,683 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:58:48,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:48,684 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:58:48,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-10-13 00:58:48,693 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:58:48,693 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:58:48,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-10-13 00:58:48,761 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:58:48,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:48,765 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:58:48,771 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-13 00:58:48,771 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:58:48,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-10-13 00:58:49,051 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-13 00:58:49,056 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Ended with exit code 0 [2021-10-13 00:58:49,057 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:58:49,057 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:58:49,057 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:58:49,058 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:58:49,058 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-13 00:58:49,058 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:58:49,058 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:58:49,058 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:58:49,058 INFO L133 ssoRankerPreferences]: Filename of dumped script: DivMinus2.c_Iteration2_Loop [2021-10-13 00:58:49,058 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:58:49,058 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:58:49,061 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 00:58:49,070 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 00:58:49,074 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 00:58:49,089 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 00:58:49,185 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:58:49,191 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-13 00:58:49,192 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:58:49,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:49,194 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:58:49,233 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 00:58:49,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-10-13 00:58:49,246 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:58:49,247 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:58:49,247 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:58:49,247 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:58:49,267 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-13 00:58:49,267 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-13 00:58:49,284 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:58:49,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-10-13 00:58:49,363 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:58:49,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:49,364 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:58:49,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-10-13 00:58:49,368 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 00:58:49,379 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:58:49,379 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:58:49,379 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:58:49,379 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:58:49,384 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-13 00:58:49,384 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-13 00:58:49,396 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:58:49,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-10-13 00:58:49,438 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:58:49,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:49,440 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:58:49,445 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 00:58:49,456 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:58:49,456 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:58:49,457 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:58:49,457 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:58:49,457 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:58:49,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-10-13 00:58:49,460 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:58:49,460 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:58:49,480 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-13 00:58:49,493 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2021-10-13 00:58:49,493 INFO L444 ModelExtractionUtils]: 1 out of 5 variables were initially zero. Simplification set additionally 2 variables to zero. [2021-10-13 00:58:49,495 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:58:49,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:49,496 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:58:49,524 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-13 00:58:49,524 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-13 00:58:49,524 INFO L513 LassoAnalysis]: Proved termination. [2021-10-13 00:58:49,525 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0) = 1*ULTIMATE.start_main_~x~0 Supporting invariants [] [2021-10-13 00:58:49,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-10-13 00:58:49,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-10-13 00:58:49,575 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-13 00:58:49,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:58:49,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:58:49,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 00:58:49,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:58:49,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:58:49,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 00:58:49,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:58:49,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:58:49,813 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2021-10-13 00:58:49,814 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 9 transitions. cyclomatic complexity: 3 Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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 00:58:49,851 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 9 transitions. cyclomatic complexity: 3. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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 24 states and 33 transitions. Complement of second has 7 states. [2021-10-13 00:58:49,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-10-13 00:58:49,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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 00:58:49,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2021-10-13 00:58:49,855 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 1 letters. Loop has 5 letters. [2021-10-13 00:58:49,856 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:58:49,856 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 6 letters. Loop has 5 letters. [2021-10-13 00:58:49,857 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:58:49,857 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 1 letters. Loop has 10 letters. [2021-10-13 00:58:49,858 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:58:49,858 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 24 states and 33 transitions. [2021-10-13 00:58:49,861 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2021-10-13 00:58:49,863 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 24 states to 18 states and 25 transitions. [2021-10-13 00:58:49,863 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2021-10-13 00:58:49,864 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2021-10-13 00:58:49,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 25 transitions. [2021-10-13 00:58:49,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 00:58:49,864 INFO L681 BuchiCegarLoop]: Abstraction has 18 states and 25 transitions. [2021-10-13 00:58:49,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states and 25 transitions. [2021-10-13 00:58:49,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-10-13 00:58:49,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 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 00:58:49,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2021-10-13 00:58:49,868 INFO L704 BuchiCegarLoop]: Abstraction has 17 states and 23 transitions. [2021-10-13 00:58:49,868 INFO L587 BuchiCegarLoop]: Abstraction has 17 states and 23 transitions. [2021-10-13 00:58:49,869 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-10-13 00:58:49,869 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 23 transitions. [2021-10-13 00:58:49,870 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2021-10-13 00:58:49,870 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:58:49,870 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:58:49,871 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1] [2021-10-13 00:58:49,871 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-10-13 00:58:49,871 INFO L791 eck$LassoCheckResult]: Stem: 110#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~ytmp~0, main_~res~0;havoc main_~x~0;havoc main_~y~0;havoc main_~ytmp~0;havoc main_~res~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~res~0 := 0; 111#L14-2 assume !!(main_~x~0 >= main_~y~0 && main_~y~0 > 0);main_~ytmp~0 := main_~y~0; 108#L17-2 assume !!(0 != main_~ytmp~0); 109#L17 assume main_~ytmp~0 > 0;main_~ytmp~0 := main_~ytmp~0 - 1;main_~x~0 := main_~x~0 - 1; 119#L17-2 assume !!(0 != main_~ytmp~0); 103#L17 [2021-10-13 00:58:49,871 INFO L793 eck$LassoCheckResult]: Loop: 103#L17 assume main_~ytmp~0 > 0;main_~ytmp~0 := main_~ytmp~0 - 1;main_~x~0 := main_~x~0 - 1; 104#L17-2 assume !!(0 != main_~ytmp~0); 103#L17 [2021-10-13 00:58:49,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:58:49,872 INFO L82 PathProgramCache]: Analyzing trace with hash 29869542, now seen corresponding path program 1 times [2021-10-13 00:58:49,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:58:49,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058650606] [2021-10-13 00:58:49,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:58:49,873 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:58:49,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:58:49,884 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:58:49,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:58:49,895 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:58:49,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:58:49,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1662, now seen corresponding path program 1 times [2021-10-13 00:58:49,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:58:49,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205463953] [2021-10-13 00:58:49,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:58:49,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:58:49,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:58:49,903 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:58:49,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:58:49,909 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:58:49,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:58:49,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1360140509, now seen corresponding path program 2 times [2021-10-13 00:58:49,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:58:49,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367110321] [2021-10-13 00:58:49,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:58:49,910 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:58:49,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:58:49,922 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:58:49,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:58:49,935 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:58:49,966 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:58:49,967 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:58:49,967 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:58:49,967 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:58:49,967 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-13 00:58:49,967 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:58:49,967 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:58:49,967 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:58:49,968 INFO L133 ssoRankerPreferences]: Filename of dumped script: DivMinus2.c_Iteration3_Loop [2021-10-13 00:58:49,968 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:58:49,968 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:58:49,969 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 00:58:49,973 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 00:58:49,976 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 00:58:49,984 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 00:58:50,054 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:58:50,054 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-13 00:58:50,054 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:58:50,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:50,055 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:58:50,066 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:58:50,066 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:58:50,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-10-13 00:58:50,101 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:58:50,101 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 00:58:50,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-10-13 00:58:50,144 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:58:50,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:50,149 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:58:50,155 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:58:50,156 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:58:50,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-10-13 00:58:50,188 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:58:50,189 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_3=1} Honda state: {v_rep~unnamed0~0~true_3=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 00:58:50,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-10-13 00:58:50,233 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:58:50,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:50,234 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:58:50,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-10-13 00:58:50,240 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:58:50,241 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:58:50,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2021-10-13 00:58:50,289 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:58:50,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:50,290 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:58:50,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-10-13 00:58:50,313 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-13 00:58:50,313 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:58:50,403 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-13 00:58:50,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-10-13 00:58:50,407 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:58:50,407 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:58:50,407 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:58:50,407 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:58:50,407 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-13 00:58:50,407 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:58:50,408 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:58:50,408 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:58:50,408 INFO L133 ssoRankerPreferences]: Filename of dumped script: DivMinus2.c_Iteration3_Loop [2021-10-13 00:58:50,408 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:58:50,408 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:58:50,409 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 00:58:50,416 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 00:58:50,427 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 00:58:50,430 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 00:58:50,506 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:58:50,506 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-13 00:58:50,507 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:58:50,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:50,508 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:58:50,517 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 00:58:50,528 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:58:50,529 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:58:50,529 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:58:50,529 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:58:50,533 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-13 00:58:50,533 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-13 00:58:50,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-10-13 00:58:50,552 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:58:50,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-10-13 00:58:50,592 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:58:50,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:50,594 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:58:50,601 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 00:58:50,613 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:58:50,613 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:58:50,613 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:58:50,613 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:58:50,613 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:58:50,614 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:58:50,615 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:58:50,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-10-13 00:58:50,626 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-13 00:58:50,643 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-13 00:58:50,643 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-13 00:58:50,643 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:58:50,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:50,646 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:58:50,652 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-13 00:58:50,652 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-13 00:58:50,652 INFO L513 LassoAnalysis]: Proved termination. [2021-10-13 00:58:50,652 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~ytmp~0) = 1*ULTIMATE.start_main_~ytmp~0 Supporting invariants [] [2021-10-13 00:58:50,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-10-13 00:58:50,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-10-13 00:58:50,688 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-13 00:58:50,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:58:50,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:58:50,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 00:58:50,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:58:50,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:58:50,756 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 00:58:50,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:58:50,781 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 00:58:50,782 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 00:58:50,782 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states and 23 transitions. cyclomatic complexity: 9 Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 00:58:50,801 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states and 23 transitions. cyclomatic complexity: 9. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 32 states and 45 transitions. Complement of second has 5 states. [2021-10-13 00:58:50,801 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 00:58:50,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 00:58:50,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2021-10-13 00:58:50,802 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 5 letters. Loop has 2 letters. [2021-10-13 00:58:50,802 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:58:50,802 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 7 letters. Loop has 2 letters. [2021-10-13 00:58:50,802 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:58:50,803 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 5 letters. Loop has 4 letters. [2021-10-13 00:58:50,803 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:58:50,803 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 32 states and 45 transitions. [2021-10-13 00:58:50,805 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2021-10-13 00:58:50,807 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 32 states to 29 states and 40 transitions. [2021-10-13 00:58:50,807 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 12 [2021-10-13 00:58:50,807 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 13 [2021-10-13 00:58:50,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 40 transitions. [2021-10-13 00:58:50,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 00:58:50,808 INFO L681 BuchiCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-10-13 00:58:50,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states and 40 transitions. [2021-10-13 00:58:50,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2021-10-13 00:58:50,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:58:50,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2021-10-13 00:58:50,812 INFO L704 BuchiCegarLoop]: Abstraction has 24 states and 34 transitions. [2021-10-13 00:58:50,812 INFO L587 BuchiCegarLoop]: Abstraction has 24 states and 34 transitions. [2021-10-13 00:58:50,812 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-10-13 00:58:50,812 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 34 transitions. [2021-10-13 00:58:50,814 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2021-10-13 00:58:50,814 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:58:50,814 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:58:50,814 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1] [2021-10-13 00:58:50,814 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-10-13 00:58:50,815 INFO L791 eck$LassoCheckResult]: Stem: 201#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~ytmp~0, main_~res~0;havoc main_~x~0;havoc main_~y~0;havoc main_~ytmp~0;havoc main_~res~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~res~0 := 0; 202#L14-2 assume !!(main_~x~0 >= main_~y~0 && main_~y~0 > 0);main_~ytmp~0 := main_~y~0; 206#L17-2 assume !!(0 != main_~ytmp~0); 215#L17 assume main_~ytmp~0 > 0;main_~ytmp~0 := main_~ytmp~0 - 1;main_~x~0 := main_~x~0 - 1; 213#L17-2 assume !!(0 != main_~ytmp~0); 211#L17 assume !(main_~ytmp~0 > 0);main_~ytmp~0 := 1 + main_~ytmp~0;main_~x~0 := 1 + main_~x~0; 208#L17-2 [2021-10-13 00:58:50,815 INFO L793 eck$LassoCheckResult]: Loop: 208#L17-2 assume !!(0 != main_~ytmp~0); 209#L17 assume main_~ytmp~0 > 0;main_~ytmp~0 := main_~ytmp~0 - 1;main_~x~0 := main_~x~0 - 1; 208#L17-2 [2021-10-13 00:58:50,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:58:50,816 INFO L82 PathProgramCache]: Analyzing trace with hash 925955826, now seen corresponding path program 1 times [2021-10-13 00:58:50,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:58:50,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613773281] [2021-10-13 00:58:50,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:58:50,821 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:58:50,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:58:50,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:58:50,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:58:50,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613773281] [2021-10-13 00:58:50,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613773281] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:58:50,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:58:50,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 00:58:50,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492612245] [2021-10-13 00:58:50,900 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-13 00:58:50,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:58:50,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1572, now seen corresponding path program 2 times [2021-10-13 00:58:50,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:58:50,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488249594] [2021-10-13 00:58:50,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:58:50,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:58:50,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:58:50,913 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:58:50,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:58:50,917 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:58:50,949 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:58:50,950 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:58:50,950 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:58:50,950 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:58:50,950 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-13 00:58:50,950 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:58:50,950 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:58:50,951 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:58:50,951 INFO L133 ssoRankerPreferences]: Filename of dumped script: DivMinus2.c_Iteration4_Loop [2021-10-13 00:58:50,951 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:58:50,953 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:58:50,955 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 00:58:50,969 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 00:58:50,972 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 00:58:50,975 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 00:58:51,084 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:58:51,085 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-13 00:58:51,085 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:58:51,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:51,099 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:58:51,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-10-13 00:58:51,124 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:58:51,124 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:58:51,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-10-13 00:58:51,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-10-13 00:58:51,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-10-13 00:58:51,198 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:58:51,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:51,200 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:58:51,221 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-13 00:58:51,221 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:58:51,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-10-13 00:58:51,272 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-13 00:58:51,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2021-10-13 00:58:51,276 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:58:51,276 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:58:51,276 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:58:51,276 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:58:51,276 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-13 00:58:51,276 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:58:51,276 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:58:51,276 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:58:51,276 INFO L133 ssoRankerPreferences]: Filename of dumped script: DivMinus2.c_Iteration4_Loop [2021-10-13 00:58:51,276 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:58:51,276 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:58:51,278 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 00:58:51,300 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 00:58:51,303 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 00:58:51,307 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 00:58:51,373 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:58:51,374 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-13 00:58:51,374 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:58:51,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:51,375 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:58:51,391 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 00:58:51,410 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:58:51,410 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:58:51,410 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:58:51,410 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:58:51,410 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:58:51,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2021-10-13 00:58:51,412 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:58:51,412 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:58:51,440 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-13 00:58:51,446 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-13 00:58:51,446 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-13 00:58:51,446 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:58:51,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:51,447 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:58:51,458 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-13 00:58:51,458 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-13 00:58:51,458 INFO L513 LassoAnalysis]: Proved termination. [2021-10-13 00:58:51,458 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~ytmp~0) = 1*ULTIMATE.start_main_~ytmp~0 Supporting invariants [] [2021-10-13 00:58:51,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2021-10-13 00:58:51,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2021-10-13 00:58:51,510 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-13 00:58:51,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:58:51,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:58:51,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 00:58:51,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:58:51,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:58:51,572 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 00:58:51,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:58:51,580 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 00:58:51,581 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 00:58:51,581 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 34 transitions. cyclomatic complexity: 14 Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 00:58:51,616 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 34 transitions. cyclomatic complexity: 14. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 32 states and 47 transitions. Complement of second has 5 states. [2021-10-13 00:58:51,617 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 00:58:51,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 00:58:51,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 11 transitions. [2021-10-13 00:58:51,618 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 6 letters. Loop has 2 letters. [2021-10-13 00:58:51,618 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:58:51,618 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 8 letters. Loop has 2 letters. [2021-10-13 00:58:51,619 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:58:51,619 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 6 letters. Loop has 4 letters. [2021-10-13 00:58:51,619 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:58:51,620 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 32 states and 47 transitions. [2021-10-13 00:58:51,624 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2021-10-13 00:58:51,627 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 32 states to 30 states and 44 transitions. [2021-10-13 00:58:51,627 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 14 [2021-10-13 00:58:51,628 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 16 [2021-10-13 00:58:51,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 44 transitions. [2021-10-13 00:58:51,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 00:58:51,628 INFO L681 BuchiCegarLoop]: Abstraction has 30 states and 44 transitions. [2021-10-13 00:58:51,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states and 44 transitions. [2021-10-13 00:58:51,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-10-13 00:58:51,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 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 00:58:51,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 42 transitions. [2021-10-13 00:58:51,642 INFO L704 BuchiCegarLoop]: Abstraction has 28 states and 42 transitions. [2021-10-13 00:58:51,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:58:51,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:58:51,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:58:51,643 INFO L87 Difference]: Start difference. First operand 28 states and 42 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 00:58:51,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:58:51,665 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2021-10-13 00:58:51,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:58:51,665 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 18 states and 24 transitions. [2021-10-13 00:58:51,668 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-10-13 00:58:51,669 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 18 states to 14 states and 18 transitions. [2021-10-13 00:58:51,669 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4 [2021-10-13 00:58:51,669 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 4 [2021-10-13 00:58:51,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 18 transitions. [2021-10-13 00:58:51,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 00:58:51,670 INFO L681 BuchiCegarLoop]: Abstraction has 14 states and 18 transitions. [2021-10-13 00:58:51,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states and 18 transitions. [2021-10-13 00:58:51,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 12. [2021-10-13 00:58:51,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 12 states have (on average 1.25) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:58:51,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2021-10-13 00:58:51,674 INFO L704 BuchiCegarLoop]: Abstraction has 12 states and 15 transitions. [2021-10-13 00:58:51,674 INFO L587 BuchiCegarLoop]: Abstraction has 12 states and 15 transitions. [2021-10-13 00:58:51,674 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-10-13 00:58:51,674 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 15 transitions. [2021-10-13 00:58:51,675 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-10-13 00:58:51,675 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:58:51,675 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:58:51,676 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 1, 1, 1] [2021-10-13 00:58:51,676 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-10-13 00:58:51,676 INFO L791 eck$LassoCheckResult]: Stem: 345#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~ytmp~0, main_~res~0;havoc main_~x~0;havoc main_~y~0;havoc main_~ytmp~0;havoc main_~res~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~res~0 := 0; 346#L14-2 assume !!(main_~x~0 >= main_~y~0 && main_~y~0 > 0);main_~ytmp~0 := main_~y~0; 342#L17-2 assume !!(0 != main_~ytmp~0); 343#L17 assume main_~ytmp~0 > 0;main_~ytmp~0 := main_~ytmp~0 - 1;main_~x~0 := main_~x~0 - 1; 344#L17-2 assume !(0 != main_~ytmp~0); 347#L16-2 main_~res~0 := 1 + main_~res~0; 348#L14-2 assume !!(main_~x~0 >= main_~y~0 && main_~y~0 > 0);main_~ytmp~0 := main_~y~0; 349#L17-2 assume !!(0 != main_~ytmp~0); 351#L17 assume main_~ytmp~0 > 0;main_~ytmp~0 := main_~ytmp~0 - 1;main_~x~0 := main_~x~0 - 1; 350#L17-2 assume !!(0 != main_~ytmp~0); 341#L17 [2021-10-13 00:58:51,677 INFO L793 eck$LassoCheckResult]: Loop: 341#L17 assume main_~ytmp~0 > 0;main_~ytmp~0 := main_~ytmp~0 - 1;main_~x~0 := main_~x~0 - 1; 340#L17-2 assume !!(0 != main_~ytmp~0); 341#L17 [2021-10-13 00:58:51,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:58:51,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1275475969, now seen corresponding path program 2 times [2021-10-13 00:58:51,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:58:51,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441958817] [2021-10-13 00:58:51,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:58:51,679 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:58:51,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:58:51,837 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:58:51,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:58:51,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441958817] [2021-10-13 00:58:51,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441958817] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:58:51,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869857867] [2021-10-13 00:58:51,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:58:51,838 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:58:51,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:51,841 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:58:51,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-13 00:58:51,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:58:51,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:58:51,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 00:58:51,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:58:52,005 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:58:52,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869857867] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:58:52,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:58:52,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-10-13 00:58:52,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238075532] [2021-10-13 00:58:52,006 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-13 00:58:52,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:58:52,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1662, now seen corresponding path program 3 times [2021-10-13 00:58:52,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:58:52,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210271634] [2021-10-13 00:58:52,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:58:52,007 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:58:52,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:58:52,012 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:58:52,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:58:52,016 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:58:52,044 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:58:52,044 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:58:52,045 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:58:52,045 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:58:52,045 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-13 00:58:52,045 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:58:52,045 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:58:52,045 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:58:52,045 INFO L133 ssoRankerPreferences]: Filename of dumped script: DivMinus2.c_Iteration5_Loop [2021-10-13 00:58:52,045 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:58:52,045 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:58:52,047 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 00:58:52,051 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 00:58:52,054 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 00:58:52,057 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 00:58:52,145 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:58:52,145 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-13 00:58:52,146 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:58:52,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:52,147 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:58:52,153 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:58:52,153 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:58:52,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2021-10-13 00:58:52,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2021-10-13 00:58:52,218 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:58:52,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:52,219 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:58:52,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2021-10-13 00:58:52,220 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-13 00:58:52,220 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:58:52,245 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:58:52,245 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~x~0=0} Honda state: {ULTIMATE.start_main_~x~0=0} Generalized eigenvectors: [{ULTIMATE.start_main_~x~0=1}, {ULTIMATE.start_main_~x~0=-2}, {ULTIMATE.start_main_~x~0=0}] Lambdas: [3, 1, 0] Nus: [1, 1] [2021-10-13 00:58:52,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Ended with exit code 0 [2021-10-13 00:58:52,268 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:58:52,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:52,269 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:58:52,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2021-10-13 00:58:52,271 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:58:52,271 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:58:52,289 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:58:52,289 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_7=1} Honda state: {v_rep~unnamed0~0~true_7=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 00:58:52,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Ended with exit code 0 [2021-10-13 00:58:52,325 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:58:52,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:52,326 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:58:52,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-10-13 00:58:52,327 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:58:52,327 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:58:52,342 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:58:52,342 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_7=0} Honda state: {v_rep~unnamed0~0~false_7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 00:58:52,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2021-10-13 00:58:52,365 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:58:52,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:52,366 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:58:52,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2021-10-13 00:58:52,369 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:58:52,369 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:58:52,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Ended with exit code 0 [2021-10-13 00:58:52,406 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:58:52,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:52,409 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:58:52,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2021-10-13 00:58:52,411 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-13 00:58:52,411 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:58:52,508 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-13 00:58:52,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Ended with exit code 0 [2021-10-13 00:58:52,511 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:58:52,511 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:58:52,511 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:58:52,511 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:58:52,511 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-13 00:58:52,511 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:58:52,511 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:58:52,511 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:58:52,511 INFO L133 ssoRankerPreferences]: Filename of dumped script: DivMinus2.c_Iteration5_Loop [2021-10-13 00:58:52,511 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:58:52,512 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:58:52,513 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 00:58:52,516 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 00:58:52,527 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 00:58:52,529 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 00:58:52,601 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:58:52,601 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-13 00:58:52,601 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:58:52,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:52,602 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:58:52,609 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 00:58:52,620 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:58:52,620 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:58:52,620 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:58:52,620 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:58:52,621 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:58:52,622 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:58:52,622 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:58:52,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2021-10-13 00:58:52,640 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:58:52,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Ended with exit code 0 [2021-10-13 00:58:52,678 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:58:52,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:52,679 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:58:52,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2021-10-13 00:58:52,680 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 00:58:52,689 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:58:52,689 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:58:52,689 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:58:52,689 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:58:52,695 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-13 00:58:52,695 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-13 00:58:52,726 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:58:52,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Forceful destruction successful, exit code 0 [2021-10-13 00:58:52,752 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:58:52,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:52,753 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:58:52,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2021-10-13 00:58:52,754 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 00:58:52,763 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:58:52,763 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:58:52,763 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:58:52,763 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:58:52,766 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-13 00:58:52,766 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-13 00:58:52,792 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:58:52,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Ended with exit code 0 [2021-10-13 00:58:52,831 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:58:52,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:52,833 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:58:52,835 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 00:58:52,846 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:58:52,846 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:58:52,846 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:58:52,846 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:58:52,847 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:58:52,848 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:58:52,848 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:58:52,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2021-10-13 00:58:52,868 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-13 00:58:52,872 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-10-13 00:58:52,873 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-10-13 00:58:52,873 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:58:52,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:52,880 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:58:52,882 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-13 00:58:52,882 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-13 00:58:52,882 INFO L513 LassoAnalysis]: Proved termination. [2021-10-13 00:58:52,882 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~ytmp~0) = 1*ULTIMATE.start_main_~ytmp~0 Supporting invariants [] [2021-10-13 00:58:52,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2021-10-13 00:58:52,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Forceful destruction successful, exit code 0 [2021-10-13 00:58:52,932 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-13 00:58:52,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:58:52,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:58:52,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 00:58:52,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:58:52,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:58:52,998 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 00:58:52,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:58:53,022 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 00:58:53,023 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 00:58:53,023 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 15 transitions. cyclomatic complexity: 5 Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 00:58:53,039 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 12 states and 15 transitions. cyclomatic complexity: 5. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 20 states and 24 transitions. Complement of second has 5 states. [2021-10-13 00:58:53,039 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 00:58:53,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 00:58:53,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2021-10-13 00:58:53,041 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 10 letters. Loop has 2 letters. [2021-10-13 00:58:53,042 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:58:53,042 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-13 00:58:53,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:58:53,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:58:53,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 00:58:53,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:58:53,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:58:53,113 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 00:58:53,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:58:53,134 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 00:58:53,134 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 2 loop predicates [2021-10-13 00:58:53,135 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 15 transitions. cyclomatic complexity: 5 Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 00:58:53,153 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 12 states and 15 transitions. cyclomatic complexity: 5. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 19 states and 23 transitions. Complement of second has 5 states. [2021-10-13 00:58:53,154 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 00:58:53,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 00:58:53,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 7 transitions. [2021-10-13 00:58:53,154 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 10 letters. Loop has 2 letters. [2021-10-13 00:58:53,154 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:58:53,154 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-13 00:58:53,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:58:53,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:58:53,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 00:58:53,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:58:53,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:58:53,257 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 00:58:53,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:58:53,302 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 00:58:53,303 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-10-13 00:58:53,304 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 15 transitions. cyclomatic complexity: 5 Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 00:58:53,326 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 12 states and 15 transitions. cyclomatic complexity: 5. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 19 states and 24 transitions. Complement of second has 6 states. [2021-10-13 00:58:53,327 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 00:58:53,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 00:58:53,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 12 transitions. [2021-10-13 00:58:53,328 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 12 transitions. Stem has 10 letters. Loop has 2 letters. [2021-10-13 00:58:53,329 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:58:53,329 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 12 transitions. Stem has 12 letters. Loop has 2 letters. [2021-10-13 00:58:53,333 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:58:53,333 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 12 transitions. Stem has 10 letters. Loop has 4 letters. [2021-10-13 00:58:53,334 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:58:53,334 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 19 states and 24 transitions. [2021-10-13 00:58:53,338 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-13 00:58:53,338 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 19 states to 0 states and 0 transitions. [2021-10-13 00:58:53,338 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-10-13 00:58:53,338 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-10-13 00:58:53,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-10-13 00:58:53,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 00:58:53,339 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 00:58:53,339 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 00:58:53,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:58:53,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 00:58:53,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Ended with exit code 0 [2021-10-13 00:58:53,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:58:53,366 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:58:53,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:58:53,367 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2021-10-13 00:58:53,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 00:58:53,367 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2021-10-13 00:58:53,367 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-13 00:58:53,367 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 00:58:53,368 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-10-13 00:58:53,368 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-10-13 00:58:53,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-10-13 00:58:53,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 00:58:53,368 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 00:58:53,368 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 00:58:53,368 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 00:58:53,369 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-10-13 00:58:53,369 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-10-13 00:58:53,369 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-13 00:58:53,369 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-10-13 00:58:53,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 13.10 12:58:53 BoogieIcfgContainer [2021-10-13 00:58:53,391 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-10-13 00:58:53,392 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 00:58:53,392 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 00:58:53,392 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 00:58:53,393 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:58:47" (3/4) ... [2021-10-13 00:58:53,396 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 00:58:53,396 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 00:58:53,398 INFO L168 Benchmark]: Toolchain (without parser) took 6611.05 ms. Allocated memory was 104.9 MB in the beginning and 136.3 MB in the end (delta: 31.5 MB). Free memory was 80.4 MB in the beginning and 103.4 MB in the end (delta: -23.0 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. [2021-10-13 00:58:53,399 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 104.9 MB. Free memory was 59.8 MB in the beginning and 59.8 MB in the end (delta: 60.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:58:53,400 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.73 ms. Allocated memory was 104.9 MB in the beginning and 136.3 MB in the end (delta: 31.5 MB). Free memory was 80.4 MB in the beginning and 113.4 MB in the end (delta: -33.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 00:58:53,401 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.34 ms. Allocated memory is still 136.3 MB. Free memory was 113.4 MB in the beginning and 112.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:58:53,401 INFO L168 Benchmark]: Boogie Preprocessor took 21.18 ms. Allocated memory is still 136.3 MB. Free memory was 112.1 MB in the beginning and 110.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:58:53,402 INFO L168 Benchmark]: RCFGBuilder took 268.92 ms. Allocated memory is still 136.3 MB. Free memory was 110.9 MB in the beginning and 103.3 MB in the end (delta: 7.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-13 00:58:53,402 INFO L168 Benchmark]: BuchiAutomizer took 5969.12 ms. Allocated memory is still 136.3 MB. Free memory was 102.9 MB in the beginning and 103.4 MB in the end (delta: -470.6 kB). Peak memory consumption was 1.6 MB. Max. memory is 16.1 GB. [2021-10-13 00:58:53,402 INFO L168 Benchmark]: Witness Printer took 4.49 ms. Allocated memory is still 136.3 MB. Free memory is still 103.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:58:53,412 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 104.9 MB. Free memory was 59.8 MB in the beginning and 59.8 MB in the end (delta: 60.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 296.73 ms. Allocated memory was 104.9 MB in the beginning and 136.3 MB in the end (delta: 31.5 MB). Free memory was 80.4 MB in the beginning and 113.4 MB in the end (delta: -33.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.34 ms. Allocated memory is still 136.3 MB. Free memory was 113.4 MB in the beginning and 112.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.18 ms. Allocated memory is still 136.3 MB. Free memory was 112.1 MB in the beginning and 110.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 268.92 ms. Allocated memory is still 136.3 MB. Free memory was 110.9 MB in the beginning and 103.3 MB in the end (delta: 7.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 5969.12 ms. Allocated memory is still 136.3 MB. Free memory was 102.9 MB in the beginning and 103.4 MB in the end (delta: -470.6 kB). Peak memory consumption was 1.6 MB. Max. memory is 16.1 GB. * Witness Printer took 4.49 ms. Allocated memory is still 136.3 MB. Free memory is still 103.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 7 terminating modules (3 trivial, 3 deterministic, 1 nondeterministic). One deterministic module has affine ranking function x and consists of 4 locations. One deterministic module has affine ranking function ytmp and consists of 3 locations. One deterministic module has affine ranking function ytmp and consists of 3 locations. One nondeterministic module has affine ranking function ytmp and consists of 3 locations. 3 modules have a trivial ranking function, the largest among these consists of 7 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 5.8s and 6 iterations. TraceHistogramMax:3. Analysis of lassos took 4.6s. Construction of modules took 0.0s. Büchi inclusion checks took 0.9s. Highest rank in rank-based complementation 3. Minimization of det autom 3. Minimization of nondet autom 4. Automata minimization 39.3ms AutomataMinimizationTime, 5 MinimizatonAttempts, 10 StatesRemovedByMinimization, 4 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 24 states and ocurred in iteration 3. Nontrivial modules had stage [3, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/1 HoareTripleCheckerStatistics: 49 SDtfs, 44 SDslu, 16 SDs, 0 SdLazy, 60 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 84.9ms Time LassoAnalysisResults: nont0 unkn0 SFLI1 SFLT2 conc0 concLT0 SILN0 SILU0 SILI0 SILT2 lasso0 LassoPreprocessingBenchmarks: Lassos: inital19 mio100 ax164 hnf100 lsp44 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq172 hnf94 smp84 dnf100 smp100 tf111 neg97 sie108 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 92ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 6 LassoNonterminationAnalysisSatUnbounded: 2 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.3s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-10-13 00:58:53,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Forceful destruction successful, exit code 0 [2021-10-13 00:58:53,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-13 00:58:53,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40d1ec6-aa29-4062-a36b-7347d686d917/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...