./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted-lit/KroeningSharyginaTsitovichWintersteiger-CAV2010-Fig1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted-lit/KroeningSharyginaTsitovichWintersteiger-CAV2010-Fig1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc --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 0f57a241e2c58801cabb7fcf6419a1ee8415c4d2687e9efe6a7f86e17b88f5ca --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 20:52:06,979 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:52:06,982 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:52:07,034 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:52:07,035 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:52:07,036 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:52:07,038 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:52:07,040 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:52:07,041 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:52:07,042 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:52:07,044 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:52:07,045 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:52:07,046 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:52:07,047 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:52:07,048 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:52:07,050 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:52:07,051 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:52:07,052 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:52:07,054 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:52:07,056 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:52:07,058 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:52:07,060 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:52:07,061 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:52:07,062 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:52:07,066 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:52:07,067 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:52:07,067 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:52:07,068 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:52:07,069 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:52:07,070 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:52:07,071 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:52:07,072 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:52:07,073 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:52:07,073 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:52:07,074 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:52:07,075 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:52:07,075 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:52:07,076 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:52:07,076 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:52:07,077 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:52:07,078 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:52:07,079 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/config/svcomp-Termination-64bit-Automizer_Default.epf [2022-11-02 20:52:07,102 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:52:07,102 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:52:07,102 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:52:07,103 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:52:07,104 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:52:07,104 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:52:07,104 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:52:07,105 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2022-11-02 20:52:07,105 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2022-11-02 20:52:07,105 INFO L138 SettingsManager]: * Use old map elimination=false [2022-11-02 20:52:07,106 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2022-11-02 20:52:07,106 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2022-11-02 20:52:07,106 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2022-11-02 20:52:07,106 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:52:07,107 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-02 20:52:07,107 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:52:07,107 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:52:07,108 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2022-11-02 20:52:07,108 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2022-11-02 20:52:07,108 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2022-11-02 20:52:07,108 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:52:07,109 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2022-11-02 20:52:07,109 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:52:07,109 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2022-11-02 20:52:07,110 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:52:07,110 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:52:07,110 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:52:07,111 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:52:07,112 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-11-02 20:52:07,112 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_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0f57a241e2c58801cabb7fcf6419a1ee8415c4d2687e9efe6a7f86e17b88f5ca [2022-11-02 20:52:07,365 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:52:07,387 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:52:07,390 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:52:07,391 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:52:07,392 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:52:07,394 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/termination-crafted-lit/KroeningSharyginaTsitovichWintersteiger-CAV2010-Fig1.c [2022-11-02 20:52:07,485 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/data/a83282f6b/e683f037567e4f1e8343432e3eb4a01a/FLAGf985effe9 [2022-11-02 20:52:07,985 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:52:07,987 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/sv-benchmarks/c/termination-crafted-lit/KroeningSharyginaTsitovichWintersteiger-CAV2010-Fig1.c [2022-11-02 20:52:07,996 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/data/a83282f6b/e683f037567e4f1e8343432e3eb4a01a/FLAGf985effe9 [2022-11-02 20:52:08,380 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/data/a83282f6b/e683f037567e4f1e8343432e3eb4a01a [2022-11-02 20:52:08,383 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:52:08,385 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:52:08,387 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:52:08,388 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:52:08,397 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:52:08,399 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:52:08" (1/1) ... [2022-11-02 20:52:08,401 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5638b7f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:08, skipping insertion in model container [2022-11-02 20:52:08,402 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:52:08" (1/1) ... [2022-11-02 20:52:08,411 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:52:08,429 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:52:08,703 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:52:08,707 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:52:08,728 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:52:08,741 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:52:08,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:08 WrapperNode [2022-11-02 20:52:08,742 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:52:08,743 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:52:08,744 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:52:08,744 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:52:08,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:08" (1/1) ... [2022-11-02 20:52:08,757 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:08" (1/1) ... [2022-11-02 20:52:08,775 INFO L138 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 18 [2022-11-02 20:52:08,776 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:52:08,777 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:52:08,777 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:52:08,777 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:52:08,787 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:08" (1/1) ... [2022-11-02 20:52:08,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:08" (1/1) ... [2022-11-02 20:52:08,788 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:08" (1/1) ... [2022-11-02 20:52:08,788 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:08" (1/1) ... [2022-11-02 20:52:08,790 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:08" (1/1) ... [2022-11-02 20:52:08,796 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:08" (1/1) ... [2022-11-02 20:52:08,797 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:08" (1/1) ... [2022-11-02 20:52:08,798 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:08" (1/1) ... [2022-11-02 20:52:08,799 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:52:08,800 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:52:08,801 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:52:08,801 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:52:08,803 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:08" (1/1) ... [2022-11-02 20:52:08,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-02 20:52:08,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:52:08,841 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-02 20:52:08,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2022-11-02 20:52:08,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:52:08,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:52:08,953 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:52:08,956 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:52:09,110 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:52:09,122 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:52:09,122 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-02 20:52:09,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:52:09 BoogieIcfgContainer [2022-11-02 20:52:09,126 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:52:09,129 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2022-11-02 20:52:09,130 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2022-11-02 20:52:09,135 INFO L275 PluginConnector]: BuchiAutomizer initialized [2022-11-02 20:52:09,136 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-11-02 20:52:09,137 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 02.11 08:52:08" (1/3) ... [2022-11-02 20:52:09,139 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@17092e04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 02.11 08:52:09, skipping insertion in model container [2022-11-02 20:52:09,139 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-11-02 20:52:09,139 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:08" (2/3) ... [2022-11-02 20:52:09,140 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@17092e04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 02.11 08:52:09, skipping insertion in model container [2022-11-02 20:52:09,140 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-11-02 20:52:09,140 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:52:09" (3/3) ... [2022-11-02 20:52:09,142 INFO L332 chiAutomizerObserver]: Analyzing ICFG KroeningSharyginaTsitovichWintersteiger-CAV2010-Fig1.c [2022-11-02 20:52:09,228 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2022-11-02 20:52:09,228 INFO L304 stractBuchiCegarLoop]: Hoare is false [2022-11-02 20:52:09,228 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2022-11-02 20:52:09,228 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2022-11-02 20:52:09,229 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2022-11-02 20:52:09,229 INFO L308 stractBuchiCegarLoop]: Difference is false [2022-11-02 20:52:09,229 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2022-11-02 20:52:09,230 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2022-11-02 20:52:09,234 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 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) [2022-11-02 20:52:09,265 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2022-11-02 20:52:09,265 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-02 20:52:09,265 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-02 20:52:09,270 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2022-11-02 20:52:09,271 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2022-11-02 20:52:09,271 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2022-11-02 20:52:09,272 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 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) [2022-11-02 20:52:09,273 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2022-11-02 20:52:09,273 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-02 20:52:09,273 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-02 20:52:09,274 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2022-11-02 20:52:09,274 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2022-11-02 20:52:09,283 INFO L748 eck$LassoCheckResult]: Stem: 5#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 8#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~post1#1, main_~x~0#1, main_~debug~0#1;main_~x~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~debug~0#1 := 0; 9#L23-1true [2022-11-02 20:52:09,284 INFO L750 eck$LassoCheckResult]: Loop: 9#L23-1true assume !!(main_~x~0#1 < 255); 4#L18true assume !(0 != (if main_~x~0#1 < 0 && 0 != main_~x~0#1 % 2 then main_~x~0#1 % 2 - 2 else main_~x~0#1 % 2));main_~x~0#1 := 2 + main_~x~0#1; 7#L18-2true assume 0 != main_~debug~0#1;main_~x~0#1 := 0; 9#L23-1true [2022-11-02 20:52:09,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:09,293 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2022-11-02 20:52:09,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:09,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131194461] [2022-11-02 20:52:09,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:09,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:09,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:52:09,415 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:52:09,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:52:09,443 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:52:09,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:09,447 INFO L85 PathProgramCache]: Analyzing trace with hash 40878, now seen corresponding path program 1 times [2022-11-02 20:52:09,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:09,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697927682] [2022-11-02 20:52:09,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:09,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:09,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:52:09,499 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:52:09,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:52:09,527 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:52:09,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:09,540 INFO L85 PathProgramCache]: Analyzing trace with hash 28699820, now seen corresponding path program 1 times [2022-11-02 20:52:09,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:09,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124106153] [2022-11-02 20:52:09,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:09,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:09,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:09,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:09,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:52:09,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124106153] [2022-11-02 20:52:09,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124106153] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:52:09,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:52:09,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:52:09,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934774777] [2022-11-02 20:52:09,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:52:09,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:52:09,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:52:09,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:52:09,861 INFO L87 Difference]: Start difference. First operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 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) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:09,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:52:09,889 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2022-11-02 20:52:09,890 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 9 states and 10 transitions. [2022-11-02 20:52:09,891 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2022-11-02 20:52:09,895 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 9 states to 5 states and 6 transitions. [2022-11-02 20:52:09,896 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 5 [2022-11-02 20:52:09,896 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 5 [2022-11-02 20:52:09,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 6 transitions. [2022-11-02 20:52:09,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:52:09,897 INFO L218 hiAutomatonCegarLoop]: Abstraction has 5 states and 6 transitions. [2022-11-02 20:52:09,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states and 6 transitions. [2022-11-02 20:52:09,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2022-11-02 20:52:09,925 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) [2022-11-02 20:52:09,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 6 transitions. [2022-11-02 20:52:09,926 INFO L240 hiAutomatonCegarLoop]: Abstraction has 5 states and 6 transitions. [2022-11-02 20:52:09,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:52:09,932 INFO L428 stractBuchiCegarLoop]: Abstraction has 5 states and 6 transitions. [2022-11-02 20:52:09,932 INFO L335 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2022-11-02 20:52:09,932 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 5 states and 6 transitions. [2022-11-02 20:52:09,933 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2022-11-02 20:52:09,933 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-02 20:52:09,933 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-02 20:52:09,933 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2022-11-02 20:52:09,934 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2022-11-02 20:52:09,934 INFO L748 eck$LassoCheckResult]: Stem: 31#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 32#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~post1#1, main_~x~0#1, main_~debug~0#1;main_~x~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~debug~0#1 := 0; 33#L23-1 [2022-11-02 20:52:09,934 INFO L750 eck$LassoCheckResult]: Loop: 33#L23-1 assume !!(main_~x~0#1 < 255); 29#L18 assume !(0 != (if main_~x~0#1 < 0 && 0 != main_~x~0#1 % 2 then main_~x~0#1 % 2 - 2 else main_~x~0#1 % 2));main_~x~0#1 := 2 + main_~x~0#1; 30#L18-2 assume !(0 != main_~debug~0#1); 33#L23-1 [2022-11-02 20:52:09,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:09,935 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 2 times [2022-11-02 20:52:09,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:09,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907490852] [2022-11-02 20:52:09,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:09,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:09,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:52:09,939 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:52:09,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:52:09,943 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:52:09,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:09,943 INFO L85 PathProgramCache]: Analyzing trace with hash 40880, now seen corresponding path program 1 times [2022-11-02 20:52:09,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:09,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173305221] [2022-11-02 20:52:09,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:09,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:09,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:52:09,953 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:52:09,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:52:09,961 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:52:09,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:09,962 INFO L85 PathProgramCache]: Analyzing trace with hash 28699822, now seen corresponding path program 1 times [2022-11-02 20:52:09,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:09,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616084214] [2022-11-02 20:52:09,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:09,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:09,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:52:09,973 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:52:09,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:52:09,991 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:52:10,074 INFO L210 LassoAnalysis]: Preferences: [2022-11-02 20:52:10,075 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-02 20:52:10,075 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-02 20:52:10,075 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-02 20:52:10,075 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-11-02 20:52:10,076 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-02 20:52:10,076 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-02 20:52:10,076 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-02 20:52:10,076 INFO L133 ssoRankerPreferences]: Filename of dumped script: KroeningSharyginaTsitovichWintersteiger-CAV2010-Fig1.c_Iteration2_Loop [2022-11-02 20:52:10,076 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-02 20:52:10,080 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-02 20:52:10,101 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-02 20:52:10,132 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-02 20:52:10,310 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-02 20:52:10,311 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-11-02 20:52:10,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-02 20:52:10,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:52:10,324 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-02 20:52:10,331 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-02 20:52:10,331 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-02 20:52:10,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2022-11-02 20:52:10,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:52:10,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-02 20:52:10,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:52:10,385 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-02 20:52:10,391 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-11-02 20:52:10,391 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-02 20:52:10,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2022-11-02 20:52:10,476 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-11-02 20:52:10,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:52:10,491 INFO L210 LassoAnalysis]: Preferences: [2022-11-02 20:52:10,491 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-02 20:52:10,491 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-02 20:52:10,491 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-02 20:52:10,491 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-11-02 20:52:10,491 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-02 20:52:10,492 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-02 20:52:10,492 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-02 20:52:10,492 INFO L133 ssoRankerPreferences]: Filename of dumped script: KroeningSharyginaTsitovichWintersteiger-CAV2010-Fig1.c_Iteration2_Loop [2022-11-02 20:52:10,492 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-02 20:52:10,492 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-02 20:52:10,494 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-02 20:52:10,514 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-02 20:52:10,643 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-02 20:52:10,649 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-11-02 20:52:10,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-02 20:52:10,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:52:10,656 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-02 20:52:10,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2022-11-02 20:52:10,663 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 [2022-11-02 20:52:10,678 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-02 20:52:10,678 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-02 20:52:10,679 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-02 20:52:10,679 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-02 20:52:10,679 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-02 20:52:10,683 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-02 20:52:10,683 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-02 20:52:10,706 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-11-02 20:52:10,713 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-11-02 20:52:10,713 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-11-02 20:52:10,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-02 20:52:10,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:52:10,717 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-02 20:52:10,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2022-11-02 20:52:10,719 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-11-02 20:52:10,719 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-11-02 20:52:10,720 INFO L513 LassoAnalysis]: Proved termination. [2022-11-02 20:52:10,721 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0#1) = -1*ULTIMATE.start_main_~x~0#1 + 255 Supporting invariants [] [2022-11-02 20:52:10,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:52:10,753 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-11-02 20:52:10,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:10,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:52:10,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:52:10,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:10,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:52:10,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:52:10,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:10,911 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2022-11-02 20:52:10,912 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 5 states and 6 transitions. cyclomatic complexity: 2 Second operand has 4 states, 4 states have (on average 1.25) 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) [2022-11-02 20:52:10,953 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 5 states and 6 transitions. cyclomatic complexity: 2. Second operand has 4 states, 4 states have (on average 1.25) 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) Result 12 states and 15 transitions. Complement of second has 7 states. [2022-11-02 20:52:10,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2022-11-02 20:52:10,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.25) 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) [2022-11-02 20:52:10,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 6 transitions. [2022-11-02 20:52:10,957 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 6 transitions. Stem has 2 letters. Loop has 3 letters. [2022-11-02 20:52:10,958 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-02 20:52:10,958 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 6 transitions. Stem has 5 letters. Loop has 3 letters. [2022-11-02 20:52:10,958 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-02 20:52:10,959 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 6 transitions. Stem has 2 letters. Loop has 6 letters. [2022-11-02 20:52:10,959 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-02 20:52:10,959 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 12 states and 15 transitions. [2022-11-02 20:52:10,960 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2022-11-02 20:52:10,963 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 12 states to 12 states and 15 transitions. [2022-11-02 20:52:10,963 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2022-11-02 20:52:10,964 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2022-11-02 20:52:10,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 15 transitions. [2022-11-02 20:52:10,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-02 20:52:10,965 INFO L218 hiAutomatonCegarLoop]: Abstraction has 12 states and 15 transitions. [2022-11-02 20:52:10,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states and 15 transitions. [2022-11-02 20:52:10,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2022-11-02 20:52:10,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 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) [2022-11-02 20:52:10,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2022-11-02 20:52:10,969 INFO L240 hiAutomatonCegarLoop]: Abstraction has 11 states and 14 transitions. [2022-11-02 20:52:10,970 INFO L428 stractBuchiCegarLoop]: Abstraction has 11 states and 14 transitions. [2022-11-02 20:52:10,970 INFO L335 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2022-11-02 20:52:10,970 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 11 states and 14 transitions. [2022-11-02 20:52:10,972 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2022-11-02 20:52:10,972 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-02 20:52:10,972 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-02 20:52:10,974 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2022-11-02 20:52:10,974 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2022-11-02 20:52:10,978 INFO L748 eck$LassoCheckResult]: Stem: 89#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 90#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~post1#1, main_~x~0#1, main_~debug~0#1;main_~x~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~debug~0#1 := 0; 94#L23-1 assume !!(main_~x~0#1 < 255); 85#L18 assume 0 != (if main_~x~0#1 < 0 && 0 != main_~x~0#1 % 2 then main_~x~0#1 % 2 - 2 else main_~x~0#1 % 2);main_#t~post1#1 := main_~x~0#1;main_~x~0#1 := main_#t~post1#1 - 1;havoc main_#t~post1#1; 86#L18-2 [2022-11-02 20:52:10,979 INFO L750 eck$LassoCheckResult]: Loop: 86#L18-2 assume !(0 != main_~debug~0#1); 91#L23-1 assume !!(main_~x~0#1 < 255); 95#L18 assume !(0 != (if main_~x~0#1 < 0 && 0 != main_~x~0#1 % 2 then main_~x~0#1 % 2 - 2 else main_~x~0#1 % 2));main_~x~0#1 := 2 + main_~x~0#1; 86#L18-2 [2022-11-02 20:52:10,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:10,981 INFO L85 PathProgramCache]: Analyzing trace with hash 925798, now seen corresponding path program 1 times [2022-11-02 20:52:10,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:10,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950915490] [2022-11-02 20:52:10,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:10,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:11,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:52:11,009 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:52:11,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:52:11,015 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:52:11,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:11,016 INFO L85 PathProgramCache]: Analyzing trace with hash 51290, now seen corresponding path program 2 times [2022-11-02 20:52:11,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:11,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337822226] [2022-11-02 20:52:11,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:11,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:11,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:52:11,031 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:52:11,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:52:11,040 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:52:11,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:11,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1810665941, now seen corresponding path program 1 times [2022-11-02 20:52:11,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:11,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227993689] [2022-11-02 20:52:11,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:11,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:11,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:52:11,053 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:52:11,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:52:11,064 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:52:11,102 INFO L210 LassoAnalysis]: Preferences: [2022-11-02 20:52:11,102 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-02 20:52:11,102 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-02 20:52:11,103 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-02 20:52:11,103 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-11-02 20:52:11,103 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-02 20:52:11,103 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-02 20:52:11,103 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-02 20:52:11,103 INFO L133 ssoRankerPreferences]: Filename of dumped script: KroeningSharyginaTsitovichWintersteiger-CAV2010-Fig1.c_Iteration3_Loop [2022-11-02 20:52:11,104 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-02 20:52:11,104 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-02 20:52:11,105 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-02 20:52:11,119 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-02 20:52:11,208 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-02 20:52:11,209 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-11-02 20:52:11,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-02 20:52:11,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:52:11,210 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-02 20:52:11,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2022-11-02 20:52:11,245 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-02 20:52:11,245 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-02 20:52:11,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:52:11,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-02 20:52:11,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:52:11,303 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-02 20:52:11,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2022-11-02 20:52:11,306 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-11-02 20:52:11,306 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-02 20:52:11,358 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-11-02 20:52:11,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Ended with exit code 0 [2022-11-02 20:52:11,362 INFO L210 LassoAnalysis]: Preferences: [2022-11-02 20:52:11,362 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-02 20:52:11,362 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-02 20:52:11,363 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-02 20:52:11,363 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-11-02 20:52:11,363 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-02 20:52:11,363 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-02 20:52:11,363 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-02 20:52:11,363 INFO L133 ssoRankerPreferences]: Filename of dumped script: KroeningSharyginaTsitovichWintersteiger-CAV2010-Fig1.c_Iteration3_Loop [2022-11-02 20:52:11,363 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-02 20:52:11,363 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-02 20:52:11,364 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-02 20:52:11,387 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-02 20:52:11,486 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-02 20:52:11,486 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-11-02 20:52:11,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-02 20:52:11,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:52:11,491 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-02 20:52:11,496 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 [2022-11-02 20:52:11,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2022-11-02 20:52:11,509 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-02 20:52:11,509 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-02 20:52:11,510 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-02 20:52:11,510 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-02 20:52:11,510 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-02 20:52:11,513 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-02 20:52:11,513 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-02 20:52:11,523 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-11-02 20:52:11,528 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-11-02 20:52:11,528 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-11-02 20:52:11,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-02 20:52:11,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:52:11,532 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-02 20:52:11,545 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-11-02 20:52:11,545 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-11-02 20:52:11,545 INFO L513 LassoAnalysis]: Proved termination. [2022-11-02 20:52:11,545 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0#1) = -1*ULTIMATE.start_main_~x~0#1 + 255 Supporting invariants [] [2022-11-02 20:52:11,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2022-11-02 20:52:11,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:52:11,594 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-11-02 20:52:11,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:11,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:11,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:52:11,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:52:11,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:11,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:52:11,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:52:11,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:11,680 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2022-11-02 20:52:11,680 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 11 states and 14 transitions. cyclomatic complexity: 5 Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2022-11-02 20:52:11,694 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 11 states and 14 transitions. cyclomatic complexity: 5. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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 17 states and 22 transitions. Complement of second has 7 states. [2022-11-02 20:52:11,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2022-11-02 20:52:11,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2022-11-02 20:52:11,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 9 transitions. [2022-11-02 20:52:11,696 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 4 letters. Loop has 3 letters. [2022-11-02 20:52:11,697 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-02 20:52:11,697 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 7 letters. Loop has 3 letters. [2022-11-02 20:52:11,698 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-02 20:52:11,698 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 4 letters. Loop has 6 letters. [2022-11-02 20:52:11,698 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-02 20:52:11,698 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 17 states and 22 transitions. [2022-11-02 20:52:11,699 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2022-11-02 20:52:11,700 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 17 states to 17 states and 22 transitions. [2022-11-02 20:52:11,700 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2022-11-02 20:52:11,700 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2022-11-02 20:52:11,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 22 transitions. [2022-11-02 20:52:11,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-02 20:52:11,701 INFO L218 hiAutomatonCegarLoop]: Abstraction has 17 states and 22 transitions. [2022-11-02 20:52:11,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states and 22 transitions. [2022-11-02 20:52:11,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-02 20:52:11,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:11,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2022-11-02 20:52:11,703 INFO L240 hiAutomatonCegarLoop]: Abstraction has 17 states and 22 transitions. [2022-11-02 20:52:11,703 INFO L428 stractBuchiCegarLoop]: Abstraction has 17 states and 22 transitions. [2022-11-02 20:52:11,703 INFO L335 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2022-11-02 20:52:11,704 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 22 transitions. [2022-11-02 20:52:11,704 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2022-11-02 20:52:11,704 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-02 20:52:11,705 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-02 20:52:11,705 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1] [2022-11-02 20:52:11,705 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2022-11-02 20:52:11,705 INFO L748 eck$LassoCheckResult]: Stem: 161#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 162#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~post1#1, main_~x~0#1, main_~debug~0#1;main_~x~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~debug~0#1 := 0; 167#L23-1 assume !!(main_~x~0#1 < 255); 171#L18 assume 0 != (if main_~x~0#1 < 0 && 0 != main_~x~0#1 % 2 then main_~x~0#1 % 2 - 2 else main_~x~0#1 % 2);main_#t~post1#1 := main_~x~0#1;main_~x~0#1 := main_#t~post1#1 - 1;havoc main_#t~post1#1; 163#L18-2 assume !(0 != main_~debug~0#1); 165#L23-1 assume !!(main_~x~0#1 < 255); 157#L18 assume 0 != (if main_~x~0#1 < 0 && 0 != main_~x~0#1 % 2 then main_~x~0#1 % 2 - 2 else main_~x~0#1 % 2);main_#t~post1#1 := main_~x~0#1;main_~x~0#1 := main_#t~post1#1 - 1;havoc main_#t~post1#1; 158#L18-2 [2022-11-02 20:52:11,706 INFO L750 eck$LassoCheckResult]: Loop: 158#L18-2 assume !(0 != main_~debug~0#1); 170#L23-1 assume !!(main_~x~0#1 < 255); 169#L18 assume !(0 != (if main_~x~0#1 < 0 && 0 != main_~x~0#1 % 2 then main_~x~0#1 % 2 - 2 else main_~x~0#1 % 2));main_~x~0#1 := 2 + main_~x~0#1; 158#L18-2 [2022-11-02 20:52:11,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:11,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1810665939, now seen corresponding path program 1 times [2022-11-02 20:52:11,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:11,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777371392] [2022-11-02 20:52:11,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:11,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:11,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:12,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:12,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:52:12,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777371392] [2022-11-02 20:52:12,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777371392] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:52:12,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:52:12,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:52:12,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821206597] [2022-11-02 20:52:12,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:52:12,066 INFO L753 eck$LassoCheckResult]: stem already infeasible [2022-11-02 20:52:12,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:12,066 INFO L85 PathProgramCache]: Analyzing trace with hash 51290, now seen corresponding path program 3 times [2022-11-02 20:52:12,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:12,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381899124] [2022-11-02 20:52:12,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:12,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:12,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:52:12,087 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:52:12,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:52:12,093 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:52:12,140 INFO L210 LassoAnalysis]: Preferences: [2022-11-02 20:52:12,140 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-02 20:52:12,140 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-02 20:52:12,140 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-02 20:52:12,140 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-11-02 20:52:12,141 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-02 20:52:12,141 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-02 20:52:12,151 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-02 20:52:12,151 INFO L133 ssoRankerPreferences]: Filename of dumped script: KroeningSharyginaTsitovichWintersteiger-CAV2010-Fig1.c_Iteration4_Loop [2022-11-02 20:52:12,151 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-02 20:52:12,152 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-02 20:52:12,173 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-02 20:52:12,190 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-02 20:52:12,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:52:12,314 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-02 20:52:12,314 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-11-02 20:52:12,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-02 20:52:12,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:52:12,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:52:12,323 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-02 20:52:12,332 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-02 20:52:12,332 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-02 20:52:12,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2022-11-02 20:52:12,368 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-02 20:52:12,368 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~debug~0#1=0} Honda state: {ULTIMATE.start_main_~debug~0#1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-02 20:52:12,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:52:12,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-02 20:52:12,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:52:12,414 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-02 20:52:12,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2022-11-02 20:52:12,421 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-02 20:52:12,422 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-02 20:52:12,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:52:12,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-02 20:52:12,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:52:12,463 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-02 20:52:12,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2022-11-02 20:52:12,467 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-11-02 20:52:12,467 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-02 20:52:12,538 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-11-02 20:52:12,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:52:12,548 INFO L210 LassoAnalysis]: Preferences: [2022-11-02 20:52:12,548 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-02 20:52:12,548 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-02 20:52:12,548 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-02 20:52:12,548 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-11-02 20:52:12,548 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-02 20:52:12,548 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-02 20:52:12,548 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-02 20:52:12,549 INFO L133 ssoRankerPreferences]: Filename of dumped script: KroeningSharyginaTsitovichWintersteiger-CAV2010-Fig1.c_Iteration4_Loop [2022-11-02 20:52:12,549 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-02 20:52:12,549 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-02 20:52:12,550 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-02 20:52:12,564 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-02 20:52:12,638 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-02 20:52:12,639 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-11-02 20:52:12,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-02 20:52:12,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:52:12,640 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-02 20:52:12,652 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 [2022-11-02 20:52:12,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2022-11-02 20:52:12,666 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-02 20:52:12,666 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-02 20:52:12,666 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-02 20:52:12,667 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-02 20:52:12,667 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-02 20:52:12,667 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-02 20:52:12,668 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-02 20:52:12,682 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-02 20:52:12,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2022-11-02 20:52:12,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-02 20:52:12,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:52:12,725 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-02 20:52:12,736 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 [2022-11-02 20:52:12,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2022-11-02 20:52:12,749 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-02 20:52:12,749 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-02 20:52:12,749 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-02 20:52:12,750 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-02 20:52:12,750 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-02 20:52:12,753 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-02 20:52:12,753 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-02 20:52:12,770 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-11-02 20:52:12,775 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-11-02 20:52:12,775 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-11-02 20:52:12,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-02 20:52:12,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:52:12,780 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-02 20:52:12,789 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-11-02 20:52:12,789 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-11-02 20:52:12,789 INFO L513 LassoAnalysis]: Proved termination. [2022-11-02 20:52:12,789 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0#1) = -1*ULTIMATE.start_main_~x~0#1 + 255 Supporting invariants [] [2022-11-02 20:52:12,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2022-11-02 20:52:12,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2022-11-02 20:52:12,837 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-11-02 20:52:12,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:12,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:12,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:52:12,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:52:12,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:12,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:52:12,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:52:12,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:12,924 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2022-11-02 20:52:12,925 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states and 22 transitions. cyclomatic complexity: 8 Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2022-11-02 20:52:12,947 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states and 22 transitions. cyclomatic complexity: 8. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 21 states and 28 transitions. Complement of second has 7 states. [2022-11-02 20:52:12,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2022-11-02 20:52:12,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2022-11-02 20:52:12,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 9 transitions. [2022-11-02 20:52:12,951 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 7 letters. Loop has 3 letters. [2022-11-02 20:52:12,952 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-02 20:52:12,952 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2022-11-02 20:52:12,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:12,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:12,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:52:12,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:52:13,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:13,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:52:13,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:52:13,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:13,037 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 2 loop predicates [2022-11-02 20:52:13,038 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states and 22 transitions. cyclomatic complexity: 8 Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2022-11-02 20:52:13,064 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states and 22 transitions. cyclomatic complexity: 8. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 21 states and 28 transitions. Complement of second has 7 states. [2022-11-02 20:52:13,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2022-11-02 20:52:13,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2022-11-02 20:52:13,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 9 transitions. [2022-11-02 20:52:13,069 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 7 letters. Loop has 3 letters. [2022-11-02 20:52:13,069 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-02 20:52:13,070 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2022-11-02 20:52:13,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:13,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:13,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:52:13,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:52:13,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:13,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:52:13,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:52:13,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:13,157 INFO L141 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2022-11-02 20:52:13,157 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states and 22 transitions. cyclomatic complexity: 8 Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2022-11-02 20:52:13,183 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states and 22 transitions. cyclomatic complexity: 8. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 24 states and 32 transitions. Complement of second has 6 states. [2022-11-02 20:52:13,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2022-11-02 20:52:13,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2022-11-02 20:52:13,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2022-11-02 20:52:13,187 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 7 letters. Loop has 3 letters. [2022-11-02 20:52:13,188 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-02 20:52:13,188 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 10 letters. Loop has 3 letters. [2022-11-02 20:52:13,188 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-02 20:52:13,188 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 7 letters. Loop has 6 letters. [2022-11-02 20:52:13,189 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-02 20:52:13,189 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 24 states and 32 transitions. [2022-11-02 20:52:13,198 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2022-11-02 20:52:13,200 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 24 states to 20 states and 26 transitions. [2022-11-02 20:52:13,200 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2022-11-02 20:52:13,200 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2022-11-02 20:52:13,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 26 transitions. [2022-11-02 20:52:13,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-02 20:52:13,201 INFO L218 hiAutomatonCegarLoop]: Abstraction has 20 states and 26 transitions. [2022-11-02 20:52:13,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states and 26 transitions. [2022-11-02 20:52:13,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 9. [2022-11-02 20:52:13,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 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) [2022-11-02 20:52:13,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 12 transitions. [2022-11-02 20:52:13,207 INFO L240 hiAutomatonCegarLoop]: Abstraction has 9 states and 12 transitions. [2022-11-02 20:52:13,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:52:13,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:52:13,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:52:13,209 INFO L87 Difference]: Start difference. First operand 9 states and 12 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:13,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:52:13,222 INFO L93 Difference]: Finished difference Result 11 states and 13 transitions. [2022-11-02 20:52:13,223 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 13 transitions. [2022-11-02 20:52:13,226 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2022-11-02 20:52:13,226 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 0 states and 0 transitions. [2022-11-02 20:52:13,226 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2022-11-02 20:52:13,226 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2022-11-02 20:52:13,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2022-11-02 20:52:13,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:52:13,227 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-02 20:52:13,227 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-02 20:52:13,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:52:13,230 INFO L428 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-02 20:52:13,231 INFO L335 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2022-11-02 20:52:13,231 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2022-11-02 20:52:13,231 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2022-11-02 20:52:13,231 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2022-11-02 20:52:13,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 02.11 08:52:13 BoogieIcfgContainer [2022-11-02 20:52:13,247 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2022-11-02 20:52:13,248 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-02 20:52:13,248 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-02 20:52:13,248 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-02 20:52:13,249 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:52:09" (3/4) ... [2022-11-02 20:52:13,257 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-02 20:52:13,257 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-02 20:52:13,258 INFO L158 Benchmark]: Toolchain (without parser) took 4872.73ms. Allocated memory is still 115.3MB. Free memory was 81.3MB in the beginning and 57.5MB in the end (delta: 23.7MB). Peak memory consumption was 23.8MB. Max. memory is 16.1GB. [2022-11-02 20:52:13,258 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 79.7MB. Free memory was 49.9MB in the beginning and 49.9MB in the end (delta: 26.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 20:52:13,260 INFO L158 Benchmark]: CACSL2BoogieTranslator took 355.37ms. Allocated memory is still 115.3MB. Free memory was 80.9MB in the beginning and 93.0MB in the end (delta: -12.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-02 20:52:13,261 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.75ms. Allocated memory is still 115.3MB. Free memory was 93.0MB in the beginning and 91.5MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 20:52:13,263 INFO L158 Benchmark]: Boogie Preprocessor took 22.77ms. Allocated memory is still 115.3MB. Free memory was 91.5MB in the beginning and 90.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-02 20:52:13,268 INFO L158 Benchmark]: RCFGBuilder took 325.68ms. Allocated memory is still 115.3MB. Free memory was 90.3MB in the beginning and 82.0MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-02 20:52:13,268 INFO L158 Benchmark]: BuchiAutomizer took 4118.04ms. Allocated memory is still 115.3MB. Free memory was 81.4MB in the beginning and 58.4MB in the end (delta: 23.1MB). Peak memory consumption was 24.7MB. Max. memory is 16.1GB. [2022-11-02 20:52:13,268 INFO L158 Benchmark]: Witness Printer took 9.44ms. Allocated memory is still 115.3MB. Free memory was 58.4MB in the beginning and 57.5MB in the end (delta: 813.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-02 20:52:13,271 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 79.7MB. Free memory was 49.9MB in the beginning and 49.9MB in the end (delta: 26.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 355.37ms. Allocated memory is still 115.3MB. Free memory was 80.9MB in the beginning and 93.0MB in the end (delta: -12.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.75ms. Allocated memory is still 115.3MB. Free memory was 93.0MB in the beginning and 91.5MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 22.77ms. Allocated memory is still 115.3MB. Free memory was 91.5MB in the beginning and 90.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 325.68ms. Allocated memory is still 115.3MB. Free memory was 90.3MB in the beginning and 82.0MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 4118.04ms. Allocated memory is still 115.3MB. Free memory was 81.4MB in the beginning and 58.4MB in the end (delta: 23.1MB). Peak memory consumption was 24.7MB. Max. memory is 16.1GB. * Witness Printer took 9.44ms. Allocated memory is still 115.3MB. Free memory was 58.4MB in the beginning and 57.5MB in the end (delta: 813.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 5 terminating modules (2 trivial, 2 deterministic, 1 nondeterministic). One deterministic module has affine ranking function 255 + -1 * x and consists of 4 locations. One deterministic module has affine ranking function 255 + -1 * x and consists of 4 locations. One nondeterministic module has affine ranking function 255 + -1 * x and consists of 4 locations. 2 modules have a trivial ranking function, the largest among these consists of 3 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 4.0s and 5 iterations. TraceHistogramMax:2. Analysis of lassos took 3.0s. Construction of modules took 0.0s. Büchi inclusion checks took 0.7s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 3. Automata minimization 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 12 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 43 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 38 mSDsluCounter, 57 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 11 mSDsCounter, 11 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 33 IncrementalHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 11 mSolverCounterUnsat, 46 mSDtfsCounter, 33 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT2 conc1 concLT0 SILN0 SILU0 SILI0 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital18 mio100 ax100 hnf100 lsp83 ukn100 mio100 lsp100 div346 bol100 ite100 ukn100 eq150 hnf94 smp47 dnf100 smp100 tf105 neg100 sie105 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 70ms VariablesStem: 0 VariablesLoop: 4 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 1 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.4s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2022-11-02 20:52:13,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2022-11-02 20:52:13,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecab7400-20b8-42ed-a0a6-a5217dc052b6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE