./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted-lit/LeikeHeizmann-TACAS2014-Ex9.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_5aaf1f6c-3ec0-4fc9-94e7-e9973a242b17/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_5aaf1f6c-3ec0-4fc9-94e7-e9973a242b17/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_5aaf1f6c-3ec0-4fc9-94e7-e9973a242b17/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_5aaf1f6c-3ec0-4fc9-94e7-e9973a242b17/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted-lit/LeikeHeizmann-TACAS2014-Ex9.c -s /tmp/vcloud-vcloud-master/worker/run_dir_5aaf1f6c-3ec0-4fc9-94e7-e9973a242b17/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_5aaf1f6c-3ec0-4fc9-94e7-e9973a242b17/bin/uautomizer --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 fce4ad715fa5546a587c43eb09d1a8cb5dcde607 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 00:12:05,041 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 00:12:05,043 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 00:12:05,129 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 00:12:05,131 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 00:12:05,138 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 00:12:05,140 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 00:12:05,149 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 00:12:05,152 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 00:12:05,155 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 00:12:05,157 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 00:12:05,159 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 00:12:05,160 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 00:12:05,168 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 00:12:05,170 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 00:12:05,171 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 00:12:05,172 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 00:12:05,173 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 00:12:05,174 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 00:12:05,176 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 00:12:05,179 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 00:12:05,180 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 00:12:05,182 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 00:12:05,187 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 00:12:05,191 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 00:12:05,197 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 00:12:05,197 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 00:12:05,198 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 00:12:05,200 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 00:12:05,202 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 00:12:05,202 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 00:12:05,203 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 00:12:05,205 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 00:12:05,207 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 00:12:05,208 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 00:12:05,208 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 00:12:05,209 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 00:12:05,210 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 00:12:05,210 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 00:12:05,211 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 00:12:05,212 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 00:12:05,215 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_5aaf1f6c-3ec0-4fc9-94e7-e9973a242b17/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-11-30 00:12:05,253 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 00:12:05,253 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 00:12:05,255 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 00:12:05,255 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 00:12:05,255 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 00:12:05,256 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-30 00:12:05,256 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-30 00:12:05,256 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-30 00:12:05,256 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-30 00:12:05,257 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-30 00:12:05,257 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-30 00:12:05,257 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 00:12:05,257 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-30 00:12:05,258 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 00:12:05,258 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 00:12:05,258 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-30 00:12:05,258 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-30 00:12:05,259 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-30 00:12:05,259 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 00:12:05,259 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-30 00:12:05,259 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 00:12:05,260 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-30 00:12:05,260 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 00:12:05,260 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 00:12:05,260 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-30 00:12:05,261 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 00:12:05,261 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 00:12:05,261 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 00:12:05,261 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-30 00:12:05,262 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-30 00:12:05,263 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-vcloud-master/worker/run_dir_5aaf1f6c-3ec0-4fc9-94e7-e9973a242b17/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_5aaf1f6c-3ec0-4fc9-94e7-e9973a242b17/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fce4ad715fa5546a587c43eb09d1a8cb5dcde607 [2020-11-30 00:12:05,500 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 00:12:05,525 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 00:12:05,528 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 00:12:05,529 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 00:12:05,530 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 00:12:05,531 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_5aaf1f6c-3ec0-4fc9-94e7-e9973a242b17/bin/uautomizer/../../sv-benchmarks/c/termination-crafted-lit/LeikeHeizmann-TACAS2014-Ex9.c [2020-11-30 00:12:05,608 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5aaf1f6c-3ec0-4fc9-94e7-e9973a242b17/bin/uautomizer/data/0233b3bcc/8a212896a29f468aa8f3b36e85e028c6/FLAG41e282375 [2020-11-30 00:12:06,058 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 00:12:06,059 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_5aaf1f6c-3ec0-4fc9-94e7-e9973a242b17/sv-benchmarks/c/termination-crafted-lit/LeikeHeizmann-TACAS2014-Ex9.c [2020-11-30 00:12:06,065 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5aaf1f6c-3ec0-4fc9-94e7-e9973a242b17/bin/uautomizer/data/0233b3bcc/8a212896a29f468aa8f3b36e85e028c6/FLAG41e282375 [2020-11-30 00:12:06,435 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_5aaf1f6c-3ec0-4fc9-94e7-e9973a242b17/bin/uautomizer/data/0233b3bcc/8a212896a29f468aa8f3b36e85e028c6 [2020-11-30 00:12:06,437 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 00:12:06,439 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 00:12:06,441 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 00:12:06,441 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 00:12:06,445 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 00:12:06,446 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:12:06" (1/1) ... [2020-11-30 00:12:06,448 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18370909 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:12:06, skipping insertion in model container [2020-11-30 00:12:06,448 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:12:06" (1/1) ... [2020-11-30 00:12:06,456 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 00:12:06,468 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 00:12:06,611 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:12:06,614 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 00:12:06,629 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:12:06,641 INFO L208 MainTranslator]: Completed translation [2020-11-30 00:12:06,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:12:06 WrapperNode [2020-11-30 00:12:06,644 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 00:12:06,646 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 00:12:06,647 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 00:12:06,648 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 00:12:06,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:12:06" (1/1) ... [2020-11-30 00:12:06,682 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:12:06" (1/1) ... [2020-11-30 00:12:06,700 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 00:12:06,702 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 00:12:06,702 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 00:12:06,703 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 00:12:06,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:12:06" (1/1) ... [2020-11-30 00:12:06,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:12:06" (1/1) ... [2020-11-30 00:12:06,711 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:12:06" (1/1) ... [2020-11-30 00:12:06,712 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:12:06" (1/1) ... [2020-11-30 00:12:06,715 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:12:06" (1/1) ... [2020-11-30 00:12:06,720 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:12:06" (1/1) ... [2020-11-30 00:12:06,721 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:12:06" (1/1) ... [2020-11-30 00:12:06,725 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 00:12:06,727 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 00:12:06,727 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 00:12:06,727 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 00:12:06,731 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:12:06" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5aaf1f6c-3ec0-4fc9-94e7-e9973a242b17/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:06,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 00:12:06,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 00:12:06,976 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 00:12:06,976 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-11-30 00:12:06,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:12:06 BoogieIcfgContainer [2020-11-30 00:12:06,978 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 00:12:06,981 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-30 00:12:06,981 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-30 00:12:06,986 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-30 00:12:06,987 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-30 00:12:06,987 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 30.11 12:12:06" (1/3) ... [2020-11-30 00:12:06,988 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5985897d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 30.11 12:12:06, skipping insertion in model container [2020-11-30 00:12:06,989 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-30 00:12:06,989 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:12:06" (2/3) ... [2020-11-30 00:12:06,989 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5985897d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 30.11 12:12:06, skipping insertion in model container [2020-11-30 00:12:06,989 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-30 00:12:06,990 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:12:06" (3/3) ... [2020-11-30 00:12:06,991 INFO L373 chiAutomizerObserver]: Analyzing ICFG LeikeHeizmann-TACAS2014-Ex9.c [2020-11-30 00:12:07,059 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-30 00:12:07,059 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-30 00:12:07,059 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-30 00:12:07,059 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 00:12:07,059 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 00:12:07,059 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-30 00:12:07,060 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 00:12:07,060 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-30 00:12:07,074 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2020-11-30 00:12:07,092 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-30 00:12:07,093 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:12:07,093 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:12:07,099 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-30 00:12:07,100 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-11-30 00:12:07,100 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-30 00:12:07,100 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2020-11-30 00:12:07,101 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-30 00:12:07,102 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:12:07,102 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:12:07,102 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-30 00:12:07,102 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-11-30 00:12:07,109 INFO L794 eck$LassoCheckResult]: Stem: 6#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~p~0, main_~q~0;havoc main_~p~0;havoc main_~q~0;main_~q~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~p~0 := main_#t~nondet1;havoc main_#t~nondet1; 9#L21-2true [2020-11-30 00:12:07,110 INFO L796 eck$LassoCheckResult]: Loop: 9#L21-2true assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 8#L18true assume main_~q~0 < main_~p~0;main_~q~0 := main_~q~0 - 1; 9#L21-2true [2020-11-30 00:12:07,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:12:07,121 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2020-11-30 00:12:07,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:12:07,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261595744] [2020-11-30 00:12:07,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:12:07,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:12:07,218 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:12:07,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:12:07,224 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:12:07,242 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:12:07,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:12:07,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 1 times [2020-11-30 00:12:07,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:12:07,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000861446] [2020-11-30 00:12:07,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:12:07,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:12:07,260 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:12:07,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:12:07,267 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:12:07,269 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:12:07,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:12:07,272 INFO L82 PathProgramCache]: Analyzing trace with hash 31075, now seen corresponding path program 1 times [2020-11-30 00:12:07,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:12:07,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125378075] [2020-11-30 00:12:07,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:12:07,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:12:07,283 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:12:07,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:12:07,291 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:12:07,293 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:12:07,413 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:12:07,414 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:12:07,414 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:12:07,414 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:12:07,415 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-30 00:12:07,415 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:07,415 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:12:07,415 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:12:07,415 INFO L133 ssoRankerPreferences]: Filename of dumped script: LeikeHeizmann-TACAS2014-Ex9.c_Iteration1_Loop [2020-11-30 00:12:07,415 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:12:07,416 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:12:07,436 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:07,462 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:07,469 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:07,681 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:12:07,682 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5aaf1f6c-3ec0-4fc9-94e7-e9973a242b17/bin/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:12:07,693 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:12:07,693 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:07,703 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:12:07,704 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: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5aaf1f6c-3ec0-4fc9-94e7-e9973a242b17/bin/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:07,729 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:12:07,730 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:12:07,734 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:12:07,734 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: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5aaf1f6c-3ec0-4fc9-94e7-e9973a242b17/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:07,761 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:12:07,761 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5aaf1f6c-3ec0-4fc9-94e7-e9973a242b17/bin/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:07,786 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-30 00:12:07,786 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:12:07,824 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-30 00:12:07,826 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:12:07,826 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:12:07,826 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:12:07,826 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:12:07,826 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-30 00:12:07,826 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:07,826 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:12:07,827 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:12:07,827 INFO L133 ssoRankerPreferences]: Filename of dumped script: LeikeHeizmann-TACAS2014-Ex9.c_Iteration1_Loop [2020-11-30 00:12:07,827 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:12:07,827 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:12:07,828 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:07,852 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:07,859 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:07,964 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:12:07,968 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5aaf1f6c-3ec0-4fc9-94e7-e9973a242b17/bin/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:12:07,983 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:07,986 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:12:07,986 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:12:07,986 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:12:07,986 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:12:07,991 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-30 00:12:07,991 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-30 00:12:07,997 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5aaf1f6c-3ec0-4fc9-94e7-e9973a242b17/bin/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:08,019 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-30 00:12:08,021 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:12:08,022 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:12:08,022 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:12:08,022 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:12:08,026 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-30 00:12:08,026 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-30 00:12:08,043 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5aaf1f6c-3ec0-4fc9-94e7-e9973a242b17/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:08,072 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-30 00:12:08,074 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:12:08,074 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:12:08,074 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:12:08,074 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:12:08,074 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:12:08,077 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:12:08,078 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:12:08,085 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-30 00:12:08,089 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-30 00:12:08,089 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5aaf1f6c-3ec0-4fc9-94e7-e9973a242b17/bin/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:08,099 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-30 00:12:08,099 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-30 00:12:08,099 INFO L510 LassoAnalysis]: Proved termination. [2020-11-30 00:12:08,100 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~q~0) = 1*ULTIMATE.start_main_~q~0 Supporting invariants [] [2020-11-30 00:12:08,134 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-30 00:12:08,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:12:08,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:12:08,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 00:12:08,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:12:08,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:12:08,207 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 00:12:08,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:12:08,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:12:08,246 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 [2020-11-30 00:12:08,247 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 8 states. Second operand 3 states. [2020-11-30 00:12:08,340 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 8 states.. Second operand 3 states. Result 30 states and 39 transitions. Complement of second has 7 states. [2020-11-30 00:12:08,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-30 00:12:08,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-11-30 00:12:08,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 20 transitions. [2020-11-30 00:12:08,346 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 1 letters. Loop has 2 letters. [2020-11-30 00:12:08,347 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:12:08,347 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 3 letters. Loop has 2 letters. [2020-11-30 00:12:08,348 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:12:08,348 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 1 letters. Loop has 4 letters. [2020-11-30 00:12:08,348 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:12:08,349 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 30 states and 39 transitions. [2020-11-30 00:12:08,359 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-30 00:12:08,364 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 30 states to 10 states and 15 transitions. [2020-11-30 00:12:08,365 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 5 [2020-11-30 00:12:08,366 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2020-11-30 00:12:08,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 15 transitions. [2020-11-30 00:12:08,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:12:08,367 INFO L691 BuchiCegarLoop]: Abstraction has 10 states and 15 transitions. [2020-11-30 00:12:08,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states and 15 transitions. [2020-11-30 00:12:08,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2020-11-30 00:12:08,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-11-30 00:12:08,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 14 transitions. [2020-11-30 00:12:08,432 INFO L714 BuchiCegarLoop]: Abstraction has 9 states and 14 transitions. [2020-11-30 00:12:08,432 INFO L594 BuchiCegarLoop]: Abstraction has 9 states and 14 transitions. [2020-11-30 00:12:08,432 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-30 00:12:08,432 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 9 states and 14 transitions. [2020-11-30 00:12:08,433 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-30 00:12:08,433 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:12:08,433 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:12:08,434 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-30 00:12:08,434 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-30 00:12:08,434 INFO L794 eck$LassoCheckResult]: Stem: 78#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~p~0, main_~q~0;havoc main_~p~0;havoc main_~q~0;main_~q~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~p~0 := main_#t~nondet1;havoc main_#t~nondet1; 79#L21-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 80#L18 [2020-11-30 00:12:08,434 INFO L796 eck$LassoCheckResult]: Loop: 80#L18 assume !(main_~q~0 < main_~p~0); 74#L21 assume main_~p~0 < main_~q~0;main_~p~0 := main_~p~0 - 1; 75#L21-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 80#L18 [2020-11-30 00:12:08,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:12:08,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2020-11-30 00:12:08,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:12:08,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044197391] [2020-11-30 00:12:08,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:12:08,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:12:08,441 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:12:08,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:12:08,444 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:12:08,446 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:12:08,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:12:08,447 INFO L82 PathProgramCache]: Analyzing trace with hash 44774, now seen corresponding path program 1 times [2020-11-30 00:12:08,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:12:08,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562926904] [2020-11-30 00:12:08,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:12:08,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:12:08,454 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:12:08,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:12:08,458 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:12:08,459 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:12:08,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:12:08,460 INFO L82 PathProgramCache]: Analyzing trace with hash 29865565, now seen corresponding path program 1 times [2020-11-30 00:12:08,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:12:08,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682048943] [2020-11-30 00:12:08,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:12:08,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:12:08,473 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:12:08,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:12:08,482 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:12:08,487 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:12:08,521 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:12:08,521 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:12:08,521 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:12:08,521 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:12:08,521 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-30 00:12:08,522 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:08,522 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:12:08,522 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:12:08,522 INFO L133 ssoRankerPreferences]: Filename of dumped script: LeikeHeizmann-TACAS2014-Ex9.c_Iteration2_Loop [2020-11-30 00:12:08,522 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:12:08,522 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:12:08,524 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:08,536 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:08,540 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:08,607 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:12:08,607 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5aaf1f6c-3ec0-4fc9-94e7-e9973a242b17/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:12:08,623 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:12:08,623 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:08,628 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:12:08,628 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: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5aaf1f6c-3ec0-4fc9-94e7-e9973a242b17/bin/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:08,672 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:12:08,672 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:12:08,678 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:12:08,679 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: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5aaf1f6c-3ec0-4fc9-94e7-e9973a242b17/bin/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:12:08,720 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:12:08,720 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5aaf1f6c-3ec0-4fc9-94e7-e9973a242b17/bin/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:12:08,772 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-30 00:12:08,772 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:08,881 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-30 00:12:08,883 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:12:08,883 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:12:08,884 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:12:08,884 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:12:08,884 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-30 00:12:08,884 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:08,884 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:12:08,884 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:12:08,884 INFO L133 ssoRankerPreferences]: Filename of dumped script: LeikeHeizmann-TACAS2014-Ex9.c_Iteration2_Loop [2020-11-30 00:12:08,884 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:12:08,884 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:12:08,886 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:08,891 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:08,895 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:08,974 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:12:08,974 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5aaf1f6c-3ec0-4fc9-94e7-e9973a242b17/bin/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:12:08,979 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-30 00:12:08,982 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:12:08,982 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:12:08,982 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:12:08,982 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:12:08,992 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-30 00:12:08,992 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:09,001 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5aaf1f6c-3ec0-4fc9-94e7-e9973a242b17/bin/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:12:09,046 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-30 00:12:09,048 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:12:09,048 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:12:09,048 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:12:09,048 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:12:09,056 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-30 00:12:09,056 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:09,061 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5aaf1f6c-3ec0-4fc9-94e7-e9973a242b17/bin/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:12:09,100 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:09,101 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:12:09,101 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:12:09,102 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:12:09,102 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:12:09,102 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:12:09,103 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:12:09,103 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:12:09,106 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-30 00:12:09,117 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-30 00:12:09,117 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5aaf1f6c-3ec0-4fc9-94e7-e9973a242b17/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:12:09,123 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-30 00:12:09,123 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-30 00:12:09,123 INFO L510 LassoAnalysis]: Proved termination. [2020-11-30 00:12:09,123 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~p~0) = 1*ULTIMATE.start_main_~p~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:09,159 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-30 00:12:09,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:12:09,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:12:09,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 00:12:09,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:12:09,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:12:09,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 00:12:09,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:12:09,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:12:09,280 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 [2020-11-30 00:12:09,280 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 9 states and 14 transitions. cyclomatic complexity: 7 Second operand 4 states. [2020-11-30 00:12:09,331 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 9 states and 14 transitions. cyclomatic complexity: 7. Second operand 4 states. Result 25 states and 38 transitions. Complement of second has 6 states. [2020-11-30 00:12:09,332 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 [2020-11-30 00:12:09,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-30 00:12:09,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2020-11-30 00:12:09,333 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 3 letters. [2020-11-30 00:12:09,333 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:12:09,333 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 5 letters. Loop has 3 letters. [2020-11-30 00:12:09,333 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:12:09,334 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 6 letters. [2020-11-30 00:12:09,334 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:12:09,334 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 38 transitions. [2020-11-30 00:12:09,335 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-30 00:12:09,336 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 23 states and 35 transitions. [2020-11-30 00:12:09,336 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2020-11-30 00:12:09,337 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2020-11-30 00:12:09,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 35 transitions. [2020-11-30 00:12:09,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:12:09,337 INFO L691 BuchiCegarLoop]: Abstraction has 23 states and 35 transitions. [2020-11-30 00:12:09,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 35 transitions. [2020-11-30 00:12:09,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-11-30 00:12:09,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-30 00:12:09,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 34 transitions. [2020-11-30 00:12:09,341 INFO L714 BuchiCegarLoop]: Abstraction has 22 states and 34 transitions. [2020-11-30 00:12:09,341 INFO L594 BuchiCegarLoop]: Abstraction has 22 states and 34 transitions. [2020-11-30 00:12:09,341 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-30 00:12:09,341 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states and 34 transitions. [2020-11-30 00:12:09,345 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-30 00:12:09,345 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:12:09,345 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:12:09,346 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-30 00:12:09,346 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-30 00:12:09,346 INFO L794 eck$LassoCheckResult]: Stem: 150#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~p~0, main_~q~0;havoc main_~p~0;havoc main_~q~0;main_~q~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~p~0 := main_#t~nondet1;havoc main_#t~nondet1; 151#L21-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 157#L18 assume !(main_~q~0 < main_~p~0); 146#L21 [2020-11-30 00:12:09,346 INFO L796 eck$LassoCheckResult]: Loop: 146#L21 assume !(main_~p~0 < main_~q~0); 147#L21-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 160#L18 assume !(main_~q~0 < main_~p~0); 146#L21 [2020-11-30 00:12:09,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:12:09,347 INFO L82 PathProgramCache]: Analyzing trace with hash 31077, now seen corresponding path program 1 times [2020-11-30 00:12:09,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:12:09,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389950517] [2020-11-30 00:12:09,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:12:09,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:12:09,366 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:12:09,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:12:09,369 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:12:09,370 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:12:09,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:12:09,371 INFO L82 PathProgramCache]: Analyzing trace with hash 49336, now seen corresponding path program 1 times [2020-11-30 00:12:09,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:12:09,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081073900] [2020-11-30 00:12:09,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:12:09,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:12:09,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:12:09,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081073900] [2020-11-30 00:12:09,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:12:09,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 00:12:09,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149102573] [2020-11-30 00:12:09,444 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-30 00:12:09,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:12:09,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 00:12:09,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:12:09,448 INFO L87 Difference]: Start difference. First operand 22 states and 34 transitions. cyclomatic complexity: 16 Second operand 4 states. [2020-11-30 00:12:09,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:12:09,480 INFO L93 Difference]: Finished difference Result 22 states and 29 transitions. [2020-11-30 00:12:09,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 00:12:09,481 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 22 states and 29 transitions. [2020-11-30 00:12:09,482 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-30 00:12:09,482 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 22 states to 0 states and 0 transitions. [2020-11-30 00:12:09,482 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-11-30 00:12:09,483 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-11-30 00:12:09,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-11-30 00:12:09,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-30 00:12:09,483 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 00:12:09,483 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 00:12:09,483 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 00:12:09,483 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-11-30 00:12:09,483 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-11-30 00:12:09,483 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-30 00:12:09,483 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-11-30 00:12:09,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 30.11 12:12:09 BoogieIcfgContainer [2020-11-30 00:12:09,489 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-30 00:12:09,490 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 00:12:09,490 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 00:12:09,490 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 00:12:09,493 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:12:06" (3/4) ... [2020-11-30 00:12:09,496 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-30 00:12:09,496 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 00:12:09,502 INFO L168 Benchmark]: Toolchain (without parser) took 3060.13 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 63.1 MB in the beginning and 76.1 MB in the end (delta: -13.0 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-11-30 00:12:09,504 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 92.3 MB. Free memory was 53.4 MB in the beginning and 53.3 MB in the end (delta: 39.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:12:09,510 INFO L168 Benchmark]: CACSL2BoogieTranslator took 204.63 ms. Allocated memory is still 92.3 MB. Free memory was 62.9 MB in the beginning and 71.8 MB in the end (delta: -8.9 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. [2020-11-30 00:12:09,511 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.83 ms. Allocated memory is still 92.3 MB. Free memory was 71.8 MB in the beginning and 70.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 00:12:09,512 INFO L168 Benchmark]: Boogie Preprocessor took 23.40 ms. Allocated memory is still 92.3 MB. Free memory was 70.4 MB in the beginning and 69.5 MB in the end (delta: 884.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:12:09,512 INFO L168 Benchmark]: RCFGBuilder took 251.33 ms. Allocated memory is still 92.3 MB. Free memory was 69.5 MB in the beginning and 61.2 MB in the end (delta: 8.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 00:12:09,513 INFO L168 Benchmark]: BuchiAutomizer took 2508.01 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 61.2 MB in the beginning and 77.3 MB in the end (delta: -16.1 MB). Peak memory consumption was 5.0 MB. Max. memory is 16.1 GB. [2020-11-30 00:12:09,513 INFO L168 Benchmark]: Witness Printer took 9.02 ms. Allocated memory is still 111.1 MB. Free memory was 77.0 MB in the beginning and 76.1 MB in the end (delta: 893.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 00:12:09,524 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 92.3 MB. Free memory was 53.4 MB in the beginning and 53.3 MB in the end (delta: 39.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 204.63 ms. Allocated memory is still 92.3 MB. Free memory was 62.9 MB in the beginning and 71.8 MB in the end (delta: -8.9 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 54.83 ms. Allocated memory is still 92.3 MB. Free memory was 71.8 MB in the beginning and 70.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.40 ms. Allocated memory is still 92.3 MB. Free memory was 70.4 MB in the beginning and 69.5 MB in the end (delta: 884.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 251.33 ms. Allocated memory is still 92.3 MB. Free memory was 69.5 MB in the beginning and 61.2 MB in the end (delta: 8.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 2508.01 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 61.2 MB in the beginning and 77.3 MB in the end (delta: -16.1 MB). Peak memory consumption was 5.0 MB. Max. memory is 16.1 GB. * Witness Printer took 9.02 ms. Allocated memory is still 111.1 MB. Free memory was 77.0 MB in the beginning and 76.1 MB in the end (delta: 893.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 3 terminating modules (1 trivial, 2 deterministic, 0 nondeterministic). One deterministic module has affine ranking function q and consists of 5 locations. One deterministic module has affine ranking function p and consists of 4 locations. 1 modules have a trivial ranking function, the largest among these consists of 4 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 2.4s and 4 iterations. TraceHistogramMax:1. Analysis of lassos took 1.8s. Construction of modules took 0.0s. Büchi inclusion checks took 0.3s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 2. Automata minimization 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 22 states and ocurred in iteration 2. Nontrivial modules had stage [2, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 15 SDtfs, 22 SDslu, 9 SDs, 0 SdLazy, 38 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time LassoAnalysisResults: nont0 unkn0 SFLI1 SFLT2 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital13 mio100 ax192 hnf100 lsp51 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq146 hnf94 smp100 dnf100 smp100 tf111 neg100 sie120 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 27ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 4 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 2 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.3s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...