./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted-lit/Urban-WST2013-Fig2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted-lit/Urban-WST2013-Fig2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 9c55a9a6f50b70c8ad02d8f9cdba1133727e3a9a73c5b8d3940178ed4735e2c1 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 09:26:55,086 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 09:26:55,088 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 09:26:55,125 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 09:26:55,126 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 09:26:55,128 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 09:26:55,130 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 09:26:55,133 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 09:26:55,136 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 09:26:55,137 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 09:26:55,139 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 09:26:55,141 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 09:26:55,141 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 09:26:55,143 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 09:26:55,145 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 09:26:55,147 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 09:26:55,149 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 09:26:55,150 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 09:26:55,153 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 09:26:55,156 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 09:26:55,158 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 09:26:55,160 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 09:26:55,161 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 09:26:55,163 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 09:26:55,167 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 09:26:55,167 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 09:26:55,168 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 09:26:55,169 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 09:26:55,170 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 09:26:55,171 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 09:26:55,172 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 09:26:55,173 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 09:26:55,174 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 09:26:55,175 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 09:26:55,177 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 09:26:55,177 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 09:26:55,178 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 09:26:55,178 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 09:26:55,179 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 09:26:55,180 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 09:26:55,180 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 09:26:55,181 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-10-28 09:26:55,207 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 09:26:55,207 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 09:26:55,208 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 09:26:55,208 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 09:26:55,209 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 09:26:55,209 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 09:26:55,210 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 09:26:55,210 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-10-28 09:26:55,210 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-10-28 09:26:55,210 INFO L138 SettingsManager]: * Use old map elimination=false [2021-10-28 09:26:55,211 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-10-28 09:26:55,211 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-10-28 09:26:55,211 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-10-28 09:26:55,211 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 09:26:55,212 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 09:26:55,212 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 09:26:55,212 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 09:26:55,212 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-10-28 09:26:55,212 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-10-28 09:26:55,213 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-10-28 09:26:55,213 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 09:26:55,213 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-10-28 09:26:55,213 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 09:26:55,214 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-10-28 09:26:55,214 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 09:26:55,214 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 09:26:55,214 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 09:26:55,215 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 09:26:55,215 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 09:26:55,216 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-10-28 09:26:55,216 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_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9c55a9a6f50b70c8ad02d8f9cdba1133727e3a9a73c5b8d3940178ed4735e2c1 [2021-10-28 09:26:55,488 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 09:26:55,518 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 09:26:55,521 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 09:26:55,524 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 09:26:55,524 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 09:26:55,526 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/termination-crafted-lit/Urban-WST2013-Fig2.c [2021-10-28 09:26:55,620 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/data/ab4bcc34c/f77d8e0646e44c2c97ef7368be58356a/FLAGfafa8edda [2021-10-28 09:26:56,226 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 09:26:56,228 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/sv-benchmarks/c/termination-crafted-lit/Urban-WST2013-Fig2.c [2021-10-28 09:26:56,235 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/data/ab4bcc34c/f77d8e0646e44c2c97ef7368be58356a/FLAGfafa8edda [2021-10-28 09:26:56,582 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/data/ab4bcc34c/f77d8e0646e44c2c97ef7368be58356a [2021-10-28 09:26:56,586 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 09:26:56,588 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 09:26:56,595 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 09:26:56,595 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 09:26:56,599 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 09:26:56,600 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:26:56" (1/1) ... [2021-10-28 09:26:56,602 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@456019f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:26:56, skipping insertion in model container [2021-10-28 09:26:56,602 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:26:56" (1/1) ... [2021-10-28 09:26:56,614 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 09:26:56,631 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 09:26:56,821 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:26:56,842 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 09:26:56,861 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:26:56,874 INFO L208 MainTranslator]: Completed translation [2021-10-28 09:26:56,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:26:56 WrapperNode [2021-10-28 09:26:56,874 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 09:26:56,876 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 09:26:56,876 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 09:26:56,876 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 09:26:56,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:26:56" (1/1) ... [2021-10-28 09:26:56,891 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:26:56" (1/1) ... [2021-10-28 09:26:56,914 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 09:26:56,915 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 09:26:56,915 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 09:26:56,915 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 09:26:56,923 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:26:56" (1/1) ... [2021-10-28 09:26:56,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:26:56" (1/1) ... [2021-10-28 09:26:56,924 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:26:56" (1/1) ... [2021-10-28 09:26:56,925 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:26:56" (1/1) ... [2021-10-28 09:26:56,927 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:26:56" (1/1) ... [2021-10-28 09:26:56,935 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:26:56" (1/1) ... [2021-10-28 09:26:56,936 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:26:56" (1/1) ... [2021-10-28 09:26:56,938 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 09:26:56,939 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 09:26:56,939 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 09:26:56,940 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 09:26:56,941 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:26:56" (1/1) ... [2021-10-28 09:26:56,952 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:26:56,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:26:56,987 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:26:57,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-10-28 09:26:57,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 09:26:57,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 09:26:57,210 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 09:26:57,210 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-28 09:26:57,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:26:57 BoogieIcfgContainer [2021-10-28 09:26:57,213 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 09:26:57,213 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-10-28 09:26:57,213 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-10-28 09:26:57,217 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-10-28 09:26:57,218 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-28 09:26:57,218 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.10 09:26:56" (1/3) ... [2021-10-28 09:26:57,220 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1dd81911 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.10 09:26:57, skipping insertion in model container [2021-10-28 09:26:57,220 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-28 09:26:57,220 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:26:56" (2/3) ... [2021-10-28 09:26:57,221 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1dd81911 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.10 09:26:57, skipping insertion in model container [2021-10-28 09:26:57,221 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-28 09:26:57,221 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:26:57" (3/3) ... [2021-10-28 09:26:57,223 INFO L389 chiAutomizerObserver]: Analyzing ICFG Urban-WST2013-Fig2.c [2021-10-28 09:26:57,275 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-10-28 09:26:57,276 INFO L360 BuchiCegarLoop]: Hoare is false [2021-10-28 09:26:57,276 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-10-28 09:26:57,276 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-28 09:26:57,276 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-28 09:26:57,276 INFO L364 BuchiCegarLoop]: Difference is false [2021-10-28 09:26:57,276 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-28 09:26:57,277 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-10-28 09:26:57,294 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:26:57,315 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-28 09:26:57,316 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:26:57,316 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:26:57,323 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-10-28 09:26:57,324 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-28 09:26:57,324 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-10-28 09:26:57,324 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:26:57,325 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-28 09:26:57,326 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:26:57,326 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:26:57,326 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-10-28 09:26:57,326 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-28 09:26:57,335 INFO L791 eck$LassoCheckResult]: Stem: 6#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 3#L19-2true [2021-10-28 09:26:57,335 INFO L793 eck$LassoCheckResult]: Loop: 3#L19-2true assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 7#L21-2true assume !(main_~x2~0 > 1); 5#L21-3true main_~x1~0 := 1 + main_~x1~0; 3#L19-2true [2021-10-28 09:26:57,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:26:57,343 INFO L85 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2021-10-28 09:26:57,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:26:57,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601343897] [2021-10-28 09:26:57,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:26:57,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:26:57,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:26:57,442 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:26:57,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:26:57,461 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:26:57,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:26:57,465 INFO L85 PathProgramCache]: Analyzing trace with hash 39951, now seen corresponding path program 1 times [2021-10-28 09:26:57,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:26:57,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250656498] [2021-10-28 09:26:57,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:26:57,466 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:26:57,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:26:57,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:26:57,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:26:57,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250656498] [2021-10-28 09:26:57,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250656498] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:26:57,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:26:57,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-28 09:26:57,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955718356] [2021-10-28 09:26:57,554 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-28 09:26:57,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:26:57,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:26:57,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:26:57,576 INFO L87 Difference]: Start difference. First operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 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) [2021-10-28 09:26:57,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:26:57,619 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2021-10-28 09:26:57,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:26:57,622 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 9 states and 10 transitions. [2021-10-28 09:26:57,623 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-10-28 09:26:57,626 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 9 states to 5 states and 6 transitions. [2021-10-28 09:26:57,627 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 5 [2021-10-28 09:26:57,627 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 5 [2021-10-28 09:26:57,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 6 transitions. [2021-10-28 09:26:57,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:26:57,628 INFO L681 BuchiCegarLoop]: Abstraction has 5 states and 6 transitions. [2021-10-28 09:26:57,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states and 6 transitions. [2021-10-28 09:26:57,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2021-10-28 09:26:57,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 1.2) 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) [2021-10-28 09:26:57,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 6 transitions. [2021-10-28 09:26:57,710 INFO L704 BuchiCegarLoop]: Abstraction has 5 states and 6 transitions. [2021-10-28 09:26:57,710 INFO L587 BuchiCegarLoop]: Abstraction has 5 states and 6 transitions. [2021-10-28 09:26:57,711 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-10-28 09:26:57,711 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 5 states and 6 transitions. [2021-10-28 09:26:57,711 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-10-28 09:26:57,712 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:26:57,712 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:26:57,712 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-10-28 09:26:57,712 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-28 09:26:57,713 INFO L791 eck$LassoCheckResult]: Stem: 29#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 26#L19-2 [2021-10-28 09:26:57,713 INFO L793 eck$LassoCheckResult]: Loop: 26#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 27#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 30#L21-2 assume !(main_~x2~0 > 1); 28#L21-3 main_~x1~0 := 1 + main_~x1~0; 26#L19-2 [2021-10-28 09:26:57,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:26:57,714 INFO L85 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 2 times [2021-10-28 09:26:57,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:26:57,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415167474] [2021-10-28 09:26:57,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:26:57,715 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:26:57,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:26:57,722 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:26:57,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:26:57,727 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:26:57,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:26:57,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1240240, now seen corresponding path program 1 times [2021-10-28 09:26:57,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:26:57,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765497984] [2021-10-28 09:26:57,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:26:57,729 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:26:57,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:26:57,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:26:57,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:26:57,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765497984] [2021-10-28 09:26:57,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765497984] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:26:57,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109384169] [2021-10-28 09:26:57,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:26:57,774 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:26:57,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:26:57,776 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:26:57,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 09:26:57,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:26:57,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 09:26:57,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:26:57,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:26:57,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109384169] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:26:57,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:26:57,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-10-28 09:26:57,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578615041] [2021-10-28 09:26:57,885 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-28 09:26:57,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:26:57,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:26:57,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:26:57,887 INFO L87 Difference]: Start difference. First operand 5 states and 6 transitions. cyclomatic complexity: 2 Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:26:57,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:26:57,911 INFO L93 Difference]: Finished difference Result 6 states and 7 transitions. [2021-10-28 09:26:57,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:26:57,912 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 6 states and 7 transitions. [2021-10-28 09:26:57,913 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-28 09:26:57,915 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 6 states to 6 states and 7 transitions. [2021-10-28 09:26:57,916 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2021-10-28 09:26:57,916 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2021-10-28 09:26:57,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 7 transitions. [2021-10-28 09:26:57,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:26:57,917 INFO L681 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2021-10-28 09:26:57,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states and 7 transitions. [2021-10-28 09:26:57,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-10-28 09:26:57,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 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) [2021-10-28 09:26:57,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2021-10-28 09:26:57,921 INFO L704 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2021-10-28 09:26:57,921 INFO L587 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2021-10-28 09:26:57,921 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-10-28 09:26:57,921 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 7 transitions. [2021-10-28 09:26:57,923 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-28 09:26:57,924 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:26:57,924 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:26:57,925 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-10-28 09:26:57,926 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1] [2021-10-28 09:26:57,926 INFO L791 eck$LassoCheckResult]: Stem: 56#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 53#L19-2 [2021-10-28 09:26:57,926 INFO L793 eck$LassoCheckResult]: Loop: 53#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 54#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 57#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 58#L21-2 assume !(main_~x2~0 > 1); 55#L21-3 main_~x1~0 := 1 + main_~x1~0; 53#L19-2 [2021-10-28 09:26:57,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:26:57,930 INFO L85 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 3 times [2021-10-28 09:26:57,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:26:57,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195187944] [2021-10-28 09:26:57,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:26:57,932 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:26:57,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:26:57,941 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:26:57,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:26:57,945 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:26:57,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:26:57,946 INFO L85 PathProgramCache]: Analyzing trace with hash 38449199, now seen corresponding path program 2 times [2021-10-28 09:26:57,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:26:57,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871031919] [2021-10-28 09:26:57,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:26:57,947 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:26:57,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:26:58,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:26:58,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:26:58,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871031919] [2021-10-28 09:26:58,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871031919] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:26:58,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023857439] [2021-10-28 09:26:58,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:26:58,052 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:26:58,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:26:58,056 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:26:58,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 09:26:58,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:26:58,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:26:58,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 09:26:58,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:26:58,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:26:58,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023857439] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:26:58,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:26:58,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-10-28 09:26:58,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988803006] [2021-10-28 09:26:58,156 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-28 09:26:58,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:26:58,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:26:58,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:26:58,157 INFO L87 Difference]: Start difference. First operand 6 states and 7 transitions. cyclomatic complexity: 2 Second operand has 5 states, 5 states have (on average 1.0) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:26:58,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:26:58,169 INFO L93 Difference]: Finished difference Result 7 states and 8 transitions. [2021-10-28 09:26:58,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:26:58,169 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 7 states and 8 transitions. [2021-10-28 09:26:58,170 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2021-10-28 09:26:58,171 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 7 states to 7 states and 8 transitions. [2021-10-28 09:26:58,171 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2021-10-28 09:26:58,171 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2021-10-28 09:26:58,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 8 transitions. [2021-10-28 09:26:58,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:26:58,172 INFO L681 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2021-10-28 09:26:58,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 8 transitions. [2021-10-28 09:26:58,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-10-28 09:26:58,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:26:58,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2021-10-28 09:26:58,174 INFO L704 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2021-10-28 09:26:58,174 INFO L587 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2021-10-28 09:26:58,174 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-10-28 09:26:58,175 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 8 transitions. [2021-10-28 09:26:58,175 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2021-10-28 09:26:58,175 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:26:58,176 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:26:58,176 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-10-28 09:26:58,176 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [3, 1, 1, 1] [2021-10-28 09:26:58,176 INFO L791 eck$LassoCheckResult]: Stem: 89#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 86#L19-2 [2021-10-28 09:26:58,177 INFO L793 eck$LassoCheckResult]: Loop: 86#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 87#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 90#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 92#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 91#L21-2 assume !(main_~x2~0 > 1); 88#L21-3 main_~x1~0 := 1 + main_~x1~0; 86#L19-2 [2021-10-28 09:26:58,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:26:58,177 INFO L85 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 4 times [2021-10-28 09:26:58,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:26:58,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211900103] [2021-10-28 09:26:58,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:26:58,179 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:26:58,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:26:58,183 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:26:58,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:26:58,187 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:26:58,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:26:58,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1191926928, now seen corresponding path program 3 times [2021-10-28 09:26:58,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:26:58,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446495168] [2021-10-28 09:26:58,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:26:58,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:26:58,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:26:58,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:26:58,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:26:58,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446495168] [2021-10-28 09:26:58,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446495168] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:26:58,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151837968] [2021-10-28 09:26:58,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:26:58,264 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:26:58,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:26:58,267 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:26:58,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 09:26:58,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-28 09:26:58,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:26:58,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 09:26:58,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:26:58,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:26:58,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151837968] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:26:58,394 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:26:58,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-10-28 09:26:58,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795314551] [2021-10-28 09:26:58,395 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-28 09:26:58,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:26:58,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:26:58,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:26:58,397 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. cyclomatic complexity: 2 Second operand has 6 states, 6 states have (on average 1.0) internal successors, (6), 5 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) [2021-10-28 09:26:58,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:26:58,411 INFO L93 Difference]: Finished difference Result 8 states and 9 transitions. [2021-10-28 09:26:58,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:26:58,411 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 8 states and 9 transitions. [2021-10-28 09:26:58,412 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-10-28 09:26:58,413 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 8 states to 8 states and 9 transitions. [2021-10-28 09:26:58,414 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2021-10-28 09:26:58,414 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2021-10-28 09:26:58,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 9 transitions. [2021-10-28 09:26:58,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:26:58,414 INFO L681 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-10-28 09:26:58,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states and 9 transitions. [2021-10-28 09:26:58,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-10-28 09:26:58,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 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) [2021-10-28 09:26:58,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-10-28 09:26:58,423 INFO L704 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-10-28 09:26:58,423 INFO L587 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-10-28 09:26:58,423 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-10-28 09:26:58,424 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states and 9 transitions. [2021-10-28 09:26:58,424 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-10-28 09:26:58,425 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:26:58,425 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:26:58,426 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-10-28 09:26:58,426 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [4, 1, 1, 1] [2021-10-28 09:26:58,426 INFO L791 eck$LassoCheckResult]: Stem: 128#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 125#L19-2 [2021-10-28 09:26:58,427 INFO L793 eck$LassoCheckResult]: Loop: 125#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 126#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 129#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 132#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 131#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 130#L21-2 assume !(main_~x2~0 > 1); 127#L21-3 main_~x1~0 := 1 + main_~x1~0; 125#L19-2 [2021-10-28 09:26:58,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:26:58,428 INFO L85 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 5 times [2021-10-28 09:26:58,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:26:58,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978389431] [2021-10-28 09:26:58,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:26:58,430 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:26:58,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:26:58,440 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:26:58,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:26:58,451 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:26:58,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:26:58,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1704969137, now seen corresponding path program 4 times [2021-10-28 09:26:58,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:26:58,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287886723] [2021-10-28 09:26:58,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:26:58,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:26:58,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:26:58,561 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:26:58,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:26:58,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287886723] [2021-10-28 09:26:58,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287886723] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:26:58,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114576969] [2021-10-28 09:26:58,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:26:58,563 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:26:58,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:26:58,566 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:26:58,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 09:26:58,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:26:58,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:26:58,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 09:26:58,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:26:58,663 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:26:58,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114576969] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:26:58,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:26:58,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-10-28 09:26:58,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513363230] [2021-10-28 09:26:58,665 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-28 09:26:58,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:26:58,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:26:58,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:26:58,667 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. cyclomatic complexity: 2 Second operand has 7 states, 7 states have (on average 1.0) internal successors, (7), 6 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) [2021-10-28 09:26:58,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:26:58,701 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2021-10-28 09:26:58,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:26:58,702 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 9 states and 10 transitions. [2021-10-28 09:26:58,703 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2021-10-28 09:26:58,706 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 9 states to 9 states and 10 transitions. [2021-10-28 09:26:58,708 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2021-10-28 09:26:58,709 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2021-10-28 09:26:58,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 10 transitions. [2021-10-28 09:26:58,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:26:58,710 INFO L681 BuchiCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-10-28 09:26:58,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 10 transitions. [2021-10-28 09:26:58,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-28 09:26:58,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:26:58,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-10-28 09:26:58,716 INFO L704 BuchiCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-10-28 09:26:58,716 INFO L587 BuchiCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-10-28 09:26:58,716 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-10-28 09:26:58,717 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 9 states and 10 transitions. [2021-10-28 09:26:58,717 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2021-10-28 09:26:58,718 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:26:58,720 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:26:58,720 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-10-28 09:26:58,721 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [5, 1, 1, 1] [2021-10-28 09:26:58,721 INFO L791 eck$LassoCheckResult]: Stem: 173#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 170#L19-2 [2021-10-28 09:26:58,722 INFO L793 eck$LassoCheckResult]: Loop: 170#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 171#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 174#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 178#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 177#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 176#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 175#L21-2 assume !(main_~x2~0 > 1); 172#L21-3 main_~x1~0 := 1 + main_~x1~0; 170#L19-2 [2021-10-28 09:26:58,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:26:58,724 INFO L85 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 6 times [2021-10-28 09:26:58,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:26:58,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087510489] [2021-10-28 09:26:58,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:26:58,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:26:58,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:26:58,735 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:26:58,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:26:58,741 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:26:58,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:26:58,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1314433936, now seen corresponding path program 5 times [2021-10-28 09:26:58,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:26:58,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480397818] [2021-10-28 09:26:58,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:26:58,745 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:26:58,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:26:58,875 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:26:58,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:26:58,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480397818] [2021-10-28 09:26:58,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480397818] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:26:58,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063252825] [2021-10-28 09:26:58,876 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:26:58,880 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:26:58,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:26:58,891 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:26:58,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 09:26:58,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-28 09:26:58,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:26:58,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:26:58,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:26:59,041 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:26:59,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063252825] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:26:59,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:26:59,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-10-28 09:26:59,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988497664] [2021-10-28 09:26:59,043 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-28 09:26:59,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:26:59,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:26:59,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:26:59,046 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. cyclomatic complexity: 2 Second operand has 8 states, 8 states have (on average 1.0) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:26:59,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:26:59,079 INFO L93 Difference]: Finished difference Result 10 states and 11 transitions. [2021-10-28 09:26:59,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 09:26:59,079 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 10 states and 11 transitions. [2021-10-28 09:26:59,080 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2021-10-28 09:26:59,081 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 10 states to 10 states and 11 transitions. [2021-10-28 09:26:59,081 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2021-10-28 09:26:59,081 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2021-10-28 09:26:59,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 11 transitions. [2021-10-28 09:26:59,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:26:59,082 INFO L681 BuchiCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-10-28 09:26:59,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states and 11 transitions. [2021-10-28 09:26:59,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-10-28 09:26:59,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 10 states have (on average 1.1) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:26:59,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-10-28 09:26:59,083 INFO L704 BuchiCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-10-28 09:26:59,083 INFO L587 BuchiCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-10-28 09:26:59,083 INFO L425 BuchiCegarLoop]: ======== Iteration 7============ [2021-10-28 09:26:59,083 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 10 states and 11 transitions. [2021-10-28 09:26:59,084 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2021-10-28 09:26:59,084 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:26:59,084 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:26:59,084 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-10-28 09:26:59,084 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [6, 1, 1, 1] [2021-10-28 09:26:59,085 INFO L791 eck$LassoCheckResult]: Stem: 224#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 221#L19-2 [2021-10-28 09:26:59,085 INFO L793 eck$LassoCheckResult]: Loop: 221#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 222#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 225#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 230#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 229#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 228#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 227#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 226#L21-2 assume !(main_~x2~0 > 1); 223#L21-3 main_~x1~0 := 1 + main_~x1~0; 221#L19-2 [2021-10-28 09:26:59,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:26:59,085 INFO L85 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 7 times [2021-10-28 09:26:59,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:26:59,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174187875] [2021-10-28 09:26:59,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:26:59,086 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:26:59,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:26:59,090 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:26:59,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:26:59,093 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:26:59,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:26:59,094 INFO L85 PathProgramCache]: Analyzing trace with hash -2092744593, now seen corresponding path program 6 times [2021-10-28 09:26:59,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:26:59,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415997226] [2021-10-28 09:26:59,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:26:59,095 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:26:59,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:26:59,220 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:26:59,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:26:59,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415997226] [2021-10-28 09:26:59,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415997226] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:26:59,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83324499] [2021-10-28 09:26:59,222 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:26:59,223 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:26:59,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:26:59,225 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:26:59,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 09:26:59,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-28 09:26:59,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:26:59,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 09:26:59,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:26:59,372 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:26:59,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83324499] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:26:59,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:26:59,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-10-28 09:26:59,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184578831] [2021-10-28 09:26:59,374 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-28 09:26:59,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:26:59,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 09:26:59,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:26:59,375 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. cyclomatic complexity: 2 Second operand has 9 states, 9 states have (on average 1.0) internal successors, (9), 8 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) [2021-10-28 09:26:59,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:26:59,404 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2021-10-28 09:26:59,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:26:59,405 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 12 transitions. [2021-10-28 09:26:59,406 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2021-10-28 09:26:59,409 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 11 states and 12 transitions. [2021-10-28 09:26:59,409 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2021-10-28 09:26:59,410 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2021-10-28 09:26:59,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 12 transitions. [2021-10-28 09:26:59,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:26:59,411 INFO L681 BuchiCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-10-28 09:26:59,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 12 transitions. [2021-10-28 09:26:59,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-28 09:26:59,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:26:59,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-10-28 09:26:59,414 INFO L704 BuchiCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-10-28 09:26:59,414 INFO L587 BuchiCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-10-28 09:26:59,415 INFO L425 BuchiCegarLoop]: ======== Iteration 8============ [2021-10-28 09:26:59,415 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 11 states and 12 transitions. [2021-10-28 09:26:59,415 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2021-10-28 09:26:59,417 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:26:59,417 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:26:59,418 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-10-28 09:26:59,418 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [7, 1, 1, 1] [2021-10-28 09:26:59,418 INFO L791 eck$LassoCheckResult]: Stem: 281#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 278#L19-2 [2021-10-28 09:26:59,419 INFO L793 eck$LassoCheckResult]: Loop: 278#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 279#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 282#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 288#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 287#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 286#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 285#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 284#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 283#L21-2 assume !(main_~x2~0 > 1); 280#L21-3 main_~x1~0 := 1 + main_~x1~0; 278#L19-2 [2021-10-28 09:26:59,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:26:59,420 INFO L85 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 8 times [2021-10-28 09:26:59,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:26:59,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265053765] [2021-10-28 09:26:59,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:26:59,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:26:59,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:26:59,432 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:26:59,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:26:59,441 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:26:59,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:26:59,444 INFO L85 PathProgramCache]: Analyzing trace with hash -450571184, now seen corresponding path program 7 times [2021-10-28 09:26:59,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:26:59,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470984488] [2021-10-28 09:26:59,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:26:59,446 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:26:59,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:26:59,576 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:26:59,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:26:59,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470984488] [2021-10-28 09:26:59,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470984488] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:26:59,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098930098] [2021-10-28 09:26:59,579 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:26:59,579 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:26:59,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:26:59,586 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:26:59,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 09:26:59,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:26:59,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 09:26:59,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:26:59,689 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:26:59,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098930098] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:26:59,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:26:59,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-10-28 09:26:59,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045025234] [2021-10-28 09:26:59,690 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-28 09:26:59,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:26:59,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 09:26:59,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:26:59,691 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. cyclomatic complexity: 2 Second operand has 10 states, 10 states have (on average 1.0) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:26:59,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:26:59,711 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2021-10-28 09:26:59,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 09:26:59,712 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 12 states and 13 transitions. [2021-10-28 09:26:59,713 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 11 [2021-10-28 09:26:59,713 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 12 states to 12 states and 13 transitions. [2021-10-28 09:26:59,713 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 12 [2021-10-28 09:26:59,714 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2021-10-28 09:26:59,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 13 transitions. [2021-10-28 09:26:59,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:26:59,714 INFO L681 BuchiCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-10-28 09:26:59,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states and 13 transitions. [2021-10-28 09:26:59,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-10-28 09:26:59,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 11 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) [2021-10-28 09:26:59,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-10-28 09:26:59,717 INFO L704 BuchiCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-10-28 09:26:59,717 INFO L587 BuchiCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-10-28 09:26:59,717 INFO L425 BuchiCegarLoop]: ======== Iteration 9============ [2021-10-28 09:26:59,717 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 13 transitions. [2021-10-28 09:26:59,718 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 11 [2021-10-28 09:26:59,718 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:26:59,718 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:26:59,718 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-10-28 09:26:59,719 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [8, 1, 1, 1] [2021-10-28 09:26:59,719 INFO L791 eck$LassoCheckResult]: Stem: 344#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 341#L19-2 [2021-10-28 09:26:59,719 INFO L793 eck$LassoCheckResult]: Loop: 341#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 342#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 345#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 352#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 351#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 350#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 349#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 348#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 347#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 346#L21-2 assume !(main_~x2~0 > 1); 343#L21-3 main_~x1~0 := 1 + main_~x1~0; 341#L19-2 [2021-10-28 09:26:59,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:26:59,720 INFO L85 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 9 times [2021-10-28 09:26:59,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:26:59,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647109789] [2021-10-28 09:26:59,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:26:59,721 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:26:59,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:26:59,725 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:26:59,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:26:59,728 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:26:59,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:26:59,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1082803057, now seen corresponding path program 8 times [2021-10-28 09:26:59,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:26:59,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343150258] [2021-10-28 09:26:59,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:26:59,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:26:59,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:26:59,841 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:26:59,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:26:59,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343150258] [2021-10-28 09:26:59,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343150258] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:26:59,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924050567] [2021-10-28 09:26:59,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:26:59,843 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:26:59,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:26:59,849 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:26:59,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 09:26:59,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:26:59,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:26:59,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 09:26:59,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:27:00,005 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:27:00,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924050567] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:27:00,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:27:00,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-10-28 09:27:00,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282677131] [2021-10-28 09:27:00,009 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-28 09:27:00,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:27:00,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 09:27:00,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:27:00,013 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. cyclomatic complexity: 2 Second operand has 11 states, 11 states have (on average 1.0) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:27:00,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:27:00,039 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2021-10-28 09:27:00,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 09:27:00,040 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 14 transitions. [2021-10-28 09:27:00,040 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2021-10-28 09:27:00,041 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 13 states and 14 transitions. [2021-10-28 09:27:00,041 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2021-10-28 09:27:00,041 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 13 [2021-10-28 09:27:00,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 14 transitions. [2021-10-28 09:27:00,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:27:00,042 INFO L681 BuchiCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-10-28 09:27:00,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 14 transitions. [2021-10-28 09:27:00,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-10-28 09:27:00,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:27:00,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-10-28 09:27:00,046 INFO L704 BuchiCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-10-28 09:27:00,046 INFO L587 BuchiCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-10-28 09:27:00,047 INFO L425 BuchiCegarLoop]: ======== Iteration 10============ [2021-10-28 09:27:00,047 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states and 14 transitions. [2021-10-28 09:27:00,049 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2021-10-28 09:27:00,049 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:27:00,049 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:27:00,050 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-10-28 09:27:00,050 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [9, 1, 1, 1] [2021-10-28 09:27:00,050 INFO L791 eck$LassoCheckResult]: Stem: 413#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 410#L19-2 [2021-10-28 09:27:00,050 INFO L793 eck$LassoCheckResult]: Loop: 410#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 411#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 414#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 422#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 421#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 420#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 419#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 418#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 417#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 416#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 415#L21-2 assume !(main_~x2~0 > 1); 412#L21-3 main_~x1~0 := 1 + main_~x1~0; 410#L19-2 [2021-10-28 09:27:00,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:27:00,051 INFO L85 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 10 times [2021-10-28 09:27:00,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:27:00,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356015421] [2021-10-28 09:27:00,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:27:00,052 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:27:00,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:27:00,057 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:27:00,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:27:00,071 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:27:00,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:27:00,072 INFO L85 PathProgramCache]: Analyzing trace with hash 792845360, now seen corresponding path program 9 times [2021-10-28 09:27:00,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:27:00,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122504086] [2021-10-28 09:27:00,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:27:00,074 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:27:00,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:27:00,091 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:27:00,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:27:00,117 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:27:00,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:27:00,118 INFO L85 PathProgramCache]: Analyzing trace with hash 287286735, now seen corresponding path program 1 times [2021-10-28 09:27:00,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:27:00,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825859656] [2021-10-28 09:27:00,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:27:00,119 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:27:00,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:27:00,129 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:27:00,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:27:00,139 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:27:00,282 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:27:00,283 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:27:00,283 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:27:00,283 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:27:00,283 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 09:27:00,283 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:27:00,284 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:27:00,284 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:27:00,284 INFO L133 ssoRankerPreferences]: Filename of dumped script: Urban-WST2013-Fig2.c_Iteration10_Loop [2021-10-28 09:27:00,284 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:27:00,284 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:27:00,306 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:27:00,314 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:27:00,317 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:27:00,324 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:27:00,388 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:27:00,389 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 09:27:00,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:27:00,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:27:00,393 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:27:00,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-10-28 09:27:00,407 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:27:00,407 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:27:00,428 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:27:00,429 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: [] [2021-10-28 09:27:00,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-10-28 09:27:00,454 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:27:00,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:27:00,459 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:27:00,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-10-28 09:27:00,468 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:27:00,468 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:27:00,491 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:27:00,491 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: [] [2021-10-28 09:27:00,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-10-28 09:27:00,524 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:27:00,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:27:00,525 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:27:00,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-10-28 09:27:00,535 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:27:00,535 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:27:00,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-10-28 09:27:00,595 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:27:00,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:27:00,597 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:27:00,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-10-28 09:27:00,606 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 09:27:00,606 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:27:00,673 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 09:27:00,679 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Ended with exit code 0 [2021-10-28 09:27:00,680 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:27:00,680 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:27:00,680 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:27:00,680 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:27:00,680 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 09:27:00,680 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:27:00,680 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:27:00,680 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:27:00,680 INFO L133 ssoRankerPreferences]: Filename of dumped script: Urban-WST2013-Fig2.c_Iteration10_Loop [2021-10-28 09:27:00,680 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:27:00,681 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:27:00,682 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:27:00,690 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:27:00,693 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:27:00,699 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:27:00,745 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:27:00,749 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 09:27:00,751 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:27:00,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:27:00,752 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:27:00,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-10-28 09:27:00,798 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 09:27:00,808 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:27:00,808 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:27:00,808 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:27:00,808 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:27:00,813 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 09:27:00,813 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 09:27:00,843 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:27:00,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2021-10-28 09:27:00,899 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:27:00,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:27:00,907 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:27:00,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-10-28 09:27:00,910 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 09:27:00,918 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:27:00,918 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:27:00,918 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:27:00,918 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:27:00,921 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 09:27:00,921 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 09:27:00,933 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:27:00,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-10-28 09:27:00,965 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:27:00,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:27:00,966 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:27:00,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-10-28 09:27:00,969 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 09:27:00,978 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:27:00,978 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:27:00,979 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:27:00,979 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:27:00,979 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:27:00,981 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:27:00,981 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:27:01,007 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 09:27:01,012 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-28 09:27:01,012 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-10-28 09:27:01,014 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:27:01,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:27:01,017 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:27:01,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-10-28 09:27:01,028 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 09:27:01,028 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 09:27:01,028 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 09:27:01,029 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x1~0) = -2*ULTIMATE.start_main_~x1~0 + 21 Supporting invariants [] [2021-10-28 09:27:01,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-10-28 09:27:01,074 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 09:27:01,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:27:01,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:27:01,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 09:27:01,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:27:01,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:27:01,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 09:27:01,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:27:01,241 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-28 09:27:01,245 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-10-28 09:27:01,246 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 13 states and 14 transitions. cyclomatic complexity: 2 Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:27:01,277 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 13 states and 14 transitions. cyclomatic complexity: 2. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 25 states and 28 transitions. Complement of second has 4 states. [2021-10-28 09:27:01,277 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 [2021-10-28 09:27:01,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:27:01,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2021-10-28 09:27:01,295 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 1 letters. Loop has 12 letters. [2021-10-28 09:27:01,296 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:27:01,296 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 13 letters. Loop has 12 letters. [2021-10-28 09:27:01,296 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:27:01,296 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 1 letters. Loop has 24 letters. [2021-10-28 09:27:01,297 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:27:01,298 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 28 transitions. [2021-10-28 09:27:01,299 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2021-10-28 09:27:01,302 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 24 states and 27 transitions. [2021-10-28 09:27:01,302 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2021-10-28 09:27:01,302 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2021-10-28 09:27:01,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 27 transitions. [2021-10-28 09:27:01,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:27:01,302 INFO L681 BuchiCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-10-28 09:27:01,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 27 transitions. [2021-10-28 09:27:01,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 15. [2021-10-28 09:27:01,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:27:01,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2021-10-28 09:27:01,304 INFO L704 BuchiCegarLoop]: Abstraction has 15 states and 18 transitions. [2021-10-28 09:27:01,304 INFO L587 BuchiCegarLoop]: Abstraction has 15 states and 18 transitions. [2021-10-28 09:27:01,304 INFO L425 BuchiCegarLoop]: ======== Iteration 11============ [2021-10-28 09:27:01,304 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 15 states and 18 transitions. [2021-10-28 09:27:01,304 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2021-10-28 09:27:01,305 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:27:01,305 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:27:01,305 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-28 09:27:01,305 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1] [2021-10-28 09:27:01,305 INFO L791 eck$LassoCheckResult]: Stem: 512#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 507#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 509#L21-2 [2021-10-28 09:27:01,305 INFO L793 eck$LassoCheckResult]: Loop: 509#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 509#L21-2 [2021-10-28 09:27:01,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:27:01,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2021-10-28 09:27:01,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:27:01,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152886519] [2021-10-28 09:27:01,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:27:01,306 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:27:01,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:27:01,310 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:27:01,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:27:01,313 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:27:01,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:27:01,314 INFO L85 PathProgramCache]: Analyzing trace with hash 50, now seen corresponding path program 1 times [2021-10-28 09:27:01,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:27:01,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242737573] [2021-10-28 09:27:01,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:27:01,314 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:27:01,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:27:01,318 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:27:01,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:27:01,320 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:27:01,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:27:01,321 INFO L85 PathProgramCache]: Analyzing trace with hash 31081, now seen corresponding path program 1 times [2021-10-28 09:27:01,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:27:01,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770398086] [2021-10-28 09:27:01,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:27:01,322 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:27:01,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:27:01,326 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:27:01,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:27:01,329 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:27:01,341 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:27:01,342 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:27:01,342 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:27:01,342 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:27:01,342 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 09:27:01,342 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:27:01,342 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:27:01,342 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:27:01,343 INFO L133 ssoRankerPreferences]: Filename of dumped script: Urban-WST2013-Fig2.c_Iteration11_Loop [2021-10-28 09:27:01,343 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:27:01,343 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:27:01,344 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:27:01,346 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:27:01,349 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:27:01,381 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:27:01,382 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 09:27:01,382 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:27:01,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:27:01,383 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:27:01,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-10-28 09:27:01,397 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:27:01,398 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:27:01,420 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:27:01,420 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: [] [2021-10-28 09:27:01,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-10-28 09:27:01,444 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:27:01,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:27:01,445 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:27:01,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-10-28 09:27:01,450 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:27:01,450 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:27:01,465 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:27:01,465 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: [] [2021-10-28 09:27:01,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-10-28 09:27:01,493 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:27:01,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:27:01,494 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:27:01,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-10-28 09:27:01,504 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:27:01,504 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:27:01,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2021-10-28 09:27:01,538 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:27:01,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:27:01,539 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:27:01,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2021-10-28 09:27:01,544 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 09:27:01,544 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:27:01,581 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 09:27:01,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2021-10-28 09:27:01,584 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:27:01,584 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:27:01,584 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:27:01,584 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:27:01,584 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 09:27:01,584 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:27:01,584 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:27:01,585 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:27:01,585 INFO L133 ssoRankerPreferences]: Filename of dumped script: Urban-WST2013-Fig2.c_Iteration11_Loop [2021-10-28 09:27:01,585 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:27:01,585 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:27:01,586 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:27:01,599 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:27:01,604 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:27:01,657 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:27:01,658 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 09:27:01,658 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:27:01,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:27:01,659 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:27:01,662 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 09:27:01,674 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:27:01,674 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:27:01,674 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:27:01,674 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:27:01,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2021-10-28 09:27:01,685 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 09:27:01,685 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 09:27:01,704 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:27:01,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2021-10-28 09:27:01,750 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:27:01,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:27:01,752 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:27:01,759 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 09:27:01,770 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:27:01,770 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:27:01,770 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:27:01,770 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:27:01,784 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 09:27:01,784 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 09:27:01,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2021-10-28 09:27:01,796 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:27:01,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2021-10-28 09:27:01,839 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:27:01,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:27:01,841 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:27:01,848 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 09:27:01,859 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:27:01,859 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:27:01,860 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:27:01,860 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:27:01,860 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:27:01,861 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:27:01,861 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:27:01,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2021-10-28 09:27:01,872 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 09:27:01,885 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-28 09:27:01,885 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-28 09:27:01,885 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:27:01,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:27:01,888 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:27:01,895 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 09:27:01,895 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 09:27:01,895 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 09:27:01,896 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x2~0) = 1*ULTIMATE.start_main_~x2~0 Supporting invariants [] [2021-10-28 09:27:01,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2021-10-28 09:27:01,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2021-10-28 09:27:01,943 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 09:27:01,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:27:01,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:27:01,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 09:27:01,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:27:01,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:27:01,980 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 09:27:01,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:27:01,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:27:01,981 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 [2021-10-28 09:27:01,982 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 15 states and 18 transitions. cyclomatic complexity: 5 Second operand has 2 states, 2 states have (on average 1.5) 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) [2021-10-28 09:27:01,996 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 15 states and 18 transitions. cyclomatic complexity: 5. Second operand has 2 states, 2 states have (on average 1.5) 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) Result 31 states and 36 transitions. Complement of second has 5 states. [2021-10-28 09:27:01,996 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 [2021-10-28 09:27:01,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 1.5) 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) [2021-10-28 09:27:01,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2021-10-28 09:27:01,997 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 1 letters. [2021-10-28 09:27:01,998 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:27:01,998 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 3 letters. Loop has 1 letters. [2021-10-28 09:27:01,998 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:27:01,998 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 2 letters. [2021-10-28 09:27:01,999 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:27:01,999 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 31 states and 36 transitions. [2021-10-28 09:27:02,003 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2021-10-28 09:27:02,005 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 31 states to 27 states and 31 transitions. [2021-10-28 09:27:02,005 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 3 [2021-10-28 09:27:02,005 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 3 [2021-10-28 09:27:02,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 31 transitions. [2021-10-28 09:27:02,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:27:02,006 INFO L681 BuchiCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-10-28 09:27:02,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states and 31 transitions. [2021-10-28 09:27:02,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 15. [2021-10-28 09:27:02,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:27:02,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-10-28 09:27:02,013 INFO L704 BuchiCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-10-28 09:27:02,013 INFO L587 BuchiCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-10-28 09:27:02,013 INFO L425 BuchiCegarLoop]: ======== Iteration 12============ [2021-10-28 09:27:02,014 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 15 states and 17 transitions. [2021-10-28 09:27:02,017 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2021-10-28 09:27:02,017 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:27:02,018 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:27:02,018 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [9, 2, 1, 1, 1] [2021-10-28 09:27:02,019 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1] [2021-10-28 09:27:02,019 INFO L791 eck$LassoCheckResult]: Stem: 587#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 582#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 583#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 588#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 596#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 595#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 594#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 593#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 592#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 591#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 590#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 589#L21-2 assume !(main_~x2~0 > 1); 586#L21-3 main_~x1~0 := 1 + main_~x1~0; 584#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 585#L21-2 [2021-10-28 09:27:02,019 INFO L793 eck$LassoCheckResult]: Loop: 585#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 585#L21-2 [2021-10-28 09:27:02,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:27:02,020 INFO L85 PathProgramCache]: Analyzing trace with hash 315954203, now seen corresponding path program 2 times [2021-10-28 09:27:02,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:27:02,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460216925] [2021-10-28 09:27:02,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:27:02,021 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:27:02,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:27:02,055 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:27:02,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:27:02,072 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:27:02,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:27:02,079 INFO L85 PathProgramCache]: Analyzing trace with hash 50, now seen corresponding path program 2 times [2021-10-28 09:27:02,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:27:02,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216970561] [2021-10-28 09:27:02,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:27:02,080 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:27:02,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:27:02,093 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:27:02,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:27:02,095 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:27:02,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:27:02,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1204645720, now seen corresponding path program 3 times [2021-10-28 09:27:02,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:27:02,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943419292] [2021-10-28 09:27:02,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:27:02,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:27:02,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:27:02,146 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:27:02,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:27:02,154 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:27:02,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2021-10-28 09:27:02,197 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:27:02,197 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:27:02,197 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:27:02,197 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:27:02,197 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 09:27:02,197 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:27:02,198 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:27:02,198 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:27:02,198 INFO L133 ssoRankerPreferences]: Filename of dumped script: Urban-WST2013-Fig2.c_Iteration12_Loop [2021-10-28 09:27:02,198 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:27:02,198 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:27:02,199 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:27:02,202 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:27:02,207 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:27:02,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-10-28 09:27:02,267 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:27:02,267 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 09:27:02,267 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:27:02,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:27:02,268 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:27:02,272 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:27:02,272 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:27:02,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2021-10-28 09:27:02,293 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:27:02,293 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_5=1} Honda state: {v_rep~unnamed0~0~true_5=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 09:27:02,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2021-10-28 09:27:02,322 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:27:02,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:27:02,323 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:27:02,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-10-28 09:27:02,324 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:27:02,324 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:27:02,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2021-10-28 09:27:02,385 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:27:02,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:27:02,387 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:27:02,393 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 09:27:02,394 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:27:02,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2021-10-28 09:27:02,453 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 09:27:02,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2021-10-28 09:27:02,456 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:27:02,456 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:27:02,456 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:27:02,456 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:27:02,456 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 09:27:02,456 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:27:02,456 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:27:02,456 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:27:02,456 INFO L133 ssoRankerPreferences]: Filename of dumped script: Urban-WST2013-Fig2.c_Iteration12_Loop [2021-10-28 09:27:02,457 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:27:02,457 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:27:02,457 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:27:02,462 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:27:02,466 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:27:02,516 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:27:02,516 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 09:27:02,516 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:27:02,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:27:02,517 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:27:02,521 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 09:27:02,532 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:27:02,532 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:27:02,533 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:27:02,533 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:27:02,537 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 09:27:02,537 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 09:27:02,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2021-10-28 09:27:02,556 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:27:02,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2021-10-28 09:27:02,597 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:27:02,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:27:02,599 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:27:02,601 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 [2021-10-28 09:27:02,612 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:27:02,612 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:27:02,612 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:27:02,613 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:27:02,613 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:27:02,614 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:27:02,614 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:27:02,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2021-10-28 09:27:02,628 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 09:27:02,633 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-28 09:27:02,634 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-28 09:27:02,634 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:27:02,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:27:02,635 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:27:02,637 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 09:27:02,638 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 09:27:02,638 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 09:27:02,638 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x2~0) = 1*ULTIMATE.start_main_~x2~0 Supporting invariants [] [2021-10-28 09:27:02,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2021-10-28 09:27:02,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Forceful destruction successful, exit code 0 [2021-10-28 09:27:02,683 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 09:27:02,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:27:02,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:27:02,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 09:27:02,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:27:02,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:27:02,777 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 09:27:02,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:27:02,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:27:02,778 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 [2021-10-28 09:27:02,779 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4 Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2021-10-28 09:27:02,796 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4. Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 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 29 states and 33 transitions. Complement of second has 5 states. [2021-10-28 09:27:02,796 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 [2021-10-28 09:27:02,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2021-10-28 09:27:02,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2021-10-28 09:27:02,797 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 14 letters. Loop has 1 letters. [2021-10-28 09:27:02,797 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:27:02,797 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-28 09:27:02,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:27:02,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:27:02,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 09:27:02,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:27:02,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:27:02,887 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 09:27:02,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:27:02,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:27:02,888 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 1 loop predicates [2021-10-28 09:27:02,889 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4 Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2021-10-28 09:27:02,898 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4. Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 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 29 states and 33 transitions. Complement of second has 5 states. [2021-10-28 09:27:02,899 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 [2021-10-28 09:27:02,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2021-10-28 09:27:02,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2021-10-28 09:27:02,899 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 14 letters. Loop has 1 letters. [2021-10-28 09:27:02,900 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:27:02,900 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-28 09:27:02,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:27:02,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:27:02,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 09:27:02,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:27:02,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:27:02,972 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 09:27:02,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:27:02,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:27:02,975 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 1 loop predicates [2021-10-28 09:27:02,975 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4 Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2021-10-28 09:27:02,986 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4. Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 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 18 states and 20 transitions. Complement of second has 4 states. [2021-10-28 09:27:02,986 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 [2021-10-28 09:27:02,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2021-10-28 09:27:02,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 9 transitions. [2021-10-28 09:27:02,987 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 14 letters. Loop has 1 letters. [2021-10-28 09:27:02,989 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:27:02,989 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 15 letters. Loop has 1 letters. [2021-10-28 09:27:02,990 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:27:02,990 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 14 letters. Loop has 2 letters. [2021-10-28 09:27:02,992 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:27:02,992 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 18 states and 20 transitions. [2021-10-28 09:27:02,994 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-28 09:27:02,994 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 18 states to 0 states and 0 transitions. [2021-10-28 09:27:02,994 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-10-28 09:27:02,994 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-10-28 09:27:02,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-10-28 09:27:02,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:27:02,994 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 09:27:02,995 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 09:27:02,995 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 09:27:02,995 INFO L425 BuchiCegarLoop]: ======== Iteration 13============ [2021-10-28 09:27:02,995 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-10-28 09:27:02,995 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-28 09:27:02,995 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-10-28 09:27:03,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.10 09:27:03 BoogieIcfgContainer [2021-10-28 09:27:03,002 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-10-28 09:27:03,002 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 09:27:03,002 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 09:27:03,003 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 09:27:03,003 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:26:57" (3/4) ... [2021-10-28 09:27:03,006 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-28 09:27:03,006 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 09:27:03,008 INFO L168 Benchmark]: Toolchain (without parser) took 6419.56 ms. Allocated memory was 111.1 MB in the beginning and 148.9 MB in the end (delta: 37.7 MB). Free memory was 73.8 MB in the beginning and 88.9 MB in the end (delta: -15.2 MB). Peak memory consumption was 22.3 MB. Max. memory is 16.1 GB. [2021-10-28 09:27:03,009 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 111.1 MB. Free memory was 89.9 MB in the beginning and 89.8 MB in the end (delta: 119.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:27:03,010 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.09 ms. Allocated memory is still 111.1 MB. Free memory was 73.6 MB in the beginning and 86.9 MB in the end (delta: -13.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 09:27:03,011 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.43 ms. Allocated memory is still 111.1 MB. Free memory was 86.9 MB in the beginning and 85.9 MB in the end (delta: 981.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:27:03,011 INFO L168 Benchmark]: Boogie Preprocessor took 23.06 ms. Allocated memory is still 111.1 MB. Free memory was 85.4 MB in the beginning and 84.9 MB in the end (delta: 516.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:27:03,011 INFO L168 Benchmark]: RCFGBuilder took 273.71 ms. Allocated memory is still 111.1 MB. Free memory was 84.9 MB in the beginning and 77.1 MB in the end (delta: 7.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-28 09:27:03,012 INFO L168 Benchmark]: BuchiAutomizer took 5788.37 ms. Allocated memory was 111.1 MB in the beginning and 148.9 MB in the end (delta: 37.7 MB). Free memory was 77.1 MB in the beginning and 88.9 MB in the end (delta: -11.9 MB). Peak memory consumption was 28.9 MB. Max. memory is 16.1 GB. [2021-10-28 09:27:03,012 INFO L168 Benchmark]: Witness Printer took 4.33 ms. Allocated memory is still 148.9 MB. Free memory is still 88.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:27:03,015 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 111.1 MB. Free memory was 89.9 MB in the beginning and 89.8 MB in the end (delta: 119.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 280.09 ms. Allocated memory is still 111.1 MB. Free memory was 73.6 MB in the beginning and 86.9 MB in the end (delta: -13.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.43 ms. Allocated memory is still 111.1 MB. Free memory was 86.9 MB in the beginning and 85.9 MB in the end (delta: 981.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.06 ms. Allocated memory is still 111.1 MB. Free memory was 85.4 MB in the beginning and 84.9 MB in the end (delta: 516.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 273.71 ms. Allocated memory is still 111.1 MB. Free memory was 84.9 MB in the beginning and 77.1 MB in the end (delta: 7.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 5788.37 ms. Allocated memory was 111.1 MB in the beginning and 148.9 MB in the end (delta: 37.7 MB). Free memory was 77.1 MB in the beginning and 88.9 MB in the end (delta: -11.9 MB). Peak memory consumption was 28.9 MB. Max. memory is 16.1 GB. * Witness Printer took 4.33 ms. Allocated memory is still 148.9 MB. Free memory is still 88.9 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 12 terminating modules (9 trivial, 2 deterministic, 1 nondeterministic). One deterministic module has affine ranking function 21 + -2 * x1 and consists of 3 locations. One deterministic module has affine ranking function x2 and consists of 3 locations. One nondeterministic module has affine ranking function x2 and consists of 3 locations. 9 modules have a trivial ranking function, the largest among these consists of 11 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 5.7s and 13 iterations. TraceHistogramMax:9. Analysis of lassos took 4.5s. Construction of modules took 0.1s. Büchi inclusion checks took 0.7s. Highest rank in rank-based complementation 3. Minimization of det autom 10. Minimization of nondet autom 2. Automata minimization 0.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 21 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 15 states and ocurred in iteration 10. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 45/45 HoareTripleCheckerStatistics: 62 SDtfs, 18 SDslu, 28 SDs, 0 SdLazy, 113 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time LassoAnalysisResults: nont0 unkn0 SFLI9 SFLT3 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital12 mio100 ax204 hnf100 lsp42 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq160 hnf93 smp100 dnf100 smp100 tf113 neg100 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 92ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 5 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.5s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-10-28 09:27:03,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Forceful destruction successful, exit code 0 [2021-10-28 09:27:03,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 09:27:03,485 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-10-28 09:27:03,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-10-28 09:27:03,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-10-28 09:27:04,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-10-28 09:27:04,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-10-28 09:27:04,485 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-10-28 09:27:04,683 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-28 09:27:04,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331901f2-7e99-4abc-9d90-cec24bd440b0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...