./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/loop-invgen/fragtest_simple.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/loop-invgen/fragtest_simple.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 32bit --witnessprinter.graph.data.programhash 5fcab3f6230f09fb280cb6a6471af8fd585365e7 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 15:21:50,877 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 15:21:50,878 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 15:21:50,898 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 15:21:50,898 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 15:21:50,899 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 15:21:50,900 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 15:21:50,902 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 15:21:50,903 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 15:21:50,904 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 15:21:50,904 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 15:21:50,905 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 15:21:50,906 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 15:21:50,906 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 15:21:50,907 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 15:21:50,908 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 15:21:50,909 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 15:21:50,910 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 15:21:50,911 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 15:21:50,912 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 15:21:50,913 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 15:21:50,914 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 15:21:50,915 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 15:21:50,916 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 15:21:50,920 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 15:21:50,920 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 15:21:50,921 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 15:21:50,921 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 15:21:50,922 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 15:21:50,922 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 15:21:50,922 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 15:21:50,923 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 15:21:50,924 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 15:21:50,924 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 15:21:50,925 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 15:21:50,925 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 15:21:50,925 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 15:21:50,926 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 15:21:50,926 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 15:21:50,926 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 15:21:50,927 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 15:21:50,936 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-08-27 15:21:50,955 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 15:21:50,956 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 15:21:50,956 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 15:21:50,956 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 15:21:50,957 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 15:21:50,957 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 15:21:50,957 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 15:21:50,957 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-08-27 15:21:50,957 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-08-27 15:21:50,957 INFO L138 SettingsManager]: * Use old map elimination=false [2021-08-27 15:21:50,957 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-08-27 15:21:50,957 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-08-27 15:21:50,957 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-08-27 15:21:50,957 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 15:21:50,963 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 15:21:50,963 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 15:21:50,963 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 15:21:50,964 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 15:21:50,964 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 15:21:50,964 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-08-27 15:21:50,964 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-08-27 15:21:50,964 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-08-27 15:21:50,964 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 15:21:50,964 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-27 15:21:50,964 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-08-27 15:21:50,964 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 15:21:50,964 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-08-27 15:21:50,965 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 15:21:50,965 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 15:21:50,965 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 15:21:50,965 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 15:21:50,965 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 15:21:50,966 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-08-27 15:21:50,967 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fcab3f6230f09fb280cb6a6471af8fd585365e7 [2021-08-27 15:21:51,233 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 15:21:51,253 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 15:21:51,255 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 15:21:51,255 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 15:21:51,256 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 15:21:51,256 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/fragtest_simple.i [2021-08-27 15:21:51,311 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9e8b6483/eee8c5d0e69e40118b3dc72b64137539/FLAG83cc75190 [2021-08-27 15:21:51,663 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 15:21:51,668 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/fragtest_simple.i [2021-08-27 15:21:51,673 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9e8b6483/eee8c5d0e69e40118b3dc72b64137539/FLAG83cc75190 [2021-08-27 15:21:51,683 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9e8b6483/eee8c5d0e69e40118b3dc72b64137539 [2021-08-27 15:21:51,684 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 15:21:51,685 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-27 15:21:51,686 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 15:21:51,686 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 15:21:51,689 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 15:21:51,689 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 03:21:51" (1/1) ... [2021-08-27 15:21:51,690 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63576c46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:21:51, skipping insertion in model container [2021-08-27 15:21:51,690 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 03:21:51" (1/1) ... [2021-08-27 15:21:51,694 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 15:21:51,703 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 15:21:51,779 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/fragtest_simple.i[893,906] [2021-08-27 15:21:51,785 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 15:21:51,790 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 15:21:51,801 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/fragtest_simple.i[893,906] [2021-08-27 15:21:51,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 15:21:51,816 INFO L208 MainTranslator]: Completed translation [2021-08-27 15:21:51,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:21:51 WrapperNode [2021-08-27 15:21:51,817 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 15:21:51,817 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-27 15:21:51,817 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-27 15:21:51,818 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-27 15:21:51,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:21:51" (1/1) ... [2021-08-27 15:21:51,856 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:21:51" (1/1) ... [2021-08-27 15:21:51,869 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-27 15:21:51,870 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 15:21:51,870 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 15:21:51,870 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 15:21:51,875 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:21:51" (1/1) ... [2021-08-27 15:21:51,875 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:21:51" (1/1) ... [2021-08-27 15:21:51,882 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:21:51" (1/1) ... [2021-08-27 15:21:51,883 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:21:51" (1/1) ... [2021-08-27 15:21:51,891 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:21:51" (1/1) ... [2021-08-27 15:21:51,894 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:21:51" (1/1) ... [2021-08-27 15:21:51,894 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:21:51" (1/1) ... [2021-08-27 15:21:51,895 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 15:21:51,896 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 15:21:51,896 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 15:21:51,896 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 15:21:51,896 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:21:51" (1/1) ... [2021-08-27 15:21:51,903 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:21:51,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:21:51,917 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 15:21:51,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-08-27 15:21:51,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-27 15:21:51,972 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 15:21:51,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 15:21:51,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 15:21:52,165 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 15:21:52,165 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-08-27 15:21:52,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 03:21:52 BoogieIcfgContainer [2021-08-27 15:21:52,167 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 15:21:52,168 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-08-27 15:21:52,168 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-08-27 15:21:52,173 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-08-27 15:21:52,173 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 15:21:52,173 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 27.08 03:21:51" (1/3) ... [2021-08-27 15:21:52,174 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@308d60c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.08 03:21:52, skipping insertion in model container [2021-08-27 15:21:52,174 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 15:21:52,174 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:21:51" (2/3) ... [2021-08-27 15:21:52,174 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@308d60c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.08 03:21:52, skipping insertion in model container [2021-08-27 15:21:52,174 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 15:21:52,175 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 03:21:52" (3/3) ... [2021-08-27 15:21:52,175 INFO L389 chiAutomizerObserver]: Analyzing ICFG fragtest_simple.i [2021-08-27 15:21:52,203 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-08-27 15:21:52,203 INFO L360 BuchiCegarLoop]: Hoare is false [2021-08-27 15:21:52,203 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-08-27 15:21:52,203 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-27 15:21:52,203 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-27 15:21:52,203 INFO L364 BuchiCegarLoop]: Difference is false [2021-08-27 15:21:52,204 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-27 15:21:52,204 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-08-27 15:21:52,212 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 15:21:52,222 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 7 [2021-08-27 15:21:52,222 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 15:21:52,222 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 15:21:52,225 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-08-27 15:21:52,225 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1] [2021-08-27 15:21:52,226 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-08-27 15:21:52,226 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 15:21:52,227 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 7 [2021-08-27 15:21:52,227 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 15:21:52,227 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 15:21:52,227 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-08-27 15:21:52,227 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1] [2021-08-27 15:21:52,240 INFO L791 eck$LassoCheckResult]: Stem: 5#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 7#L-1true havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~nondet5, main_~i~0, main_~pvlen~0, main_~tmp___1~0, main_~k~0, main_~n~0, main_~j~0;havoc main_~i~0;havoc main_~pvlen~0;havoc main_~tmp___1~0;main_~k~0 := 0;havoc main_~n~0;main_~i~0 := 0;main_~pvlen~0 := main_#t~nondet3;havoc main_#t~nondet3; 16#L31-2true [2021-08-27 15:21:52,241 INFO L793 eck$LassoCheckResult]: Loop: 16#L31-2true assume !!(0 != main_#t~nondet4 && main_~i~0 <= 1000000);havoc main_#t~nondet4;main_~i~0 := 1 + main_~i~0; 16#L31-2true [2021-08-27 15:21:52,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 15:21:52,247 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2021-08-27 15:21:52,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 15:21:52,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360899910] [2021-08-27 15:21:52,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 15:21:52,259 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 15:21:52,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:21:52,334 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 15:21:52,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:21:52,370 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 15:21:52,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 15:21:52,372 INFO L82 PathProgramCache]: Analyzing trace with hash 42, now seen corresponding path program 1 times [2021-08-27 15:21:52,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 15:21:52,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062156260] [2021-08-27 15:21:52,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 15:21:52,374 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 15:21:52,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:21:52,381 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 15:21:52,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:21:52,387 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 15:21:52,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 15:21:52,391 INFO L82 PathProgramCache]: Analyzing trace with hash 29864, now seen corresponding path program 1 times [2021-08-27 15:21:52,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 15:21:52,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861776516] [2021-08-27 15:21:52,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 15:21:52,392 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 15:21:52,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:21:52,410 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 15:21:52,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:21:52,432 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 15:21:52,503 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 15:21:52,504 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 15:21:52,504 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 15:21:52,504 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 15:21:52,504 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 15:21:52,504 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:21:52,505 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 15:21:52,505 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 15:21:52,505 INFO L133 ssoRankerPreferences]: Filename of dumped script: fragtest_simple.i_Iteration1_Loop [2021-08-27 15:21:52,505 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 15:21:52,505 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 15:21:52,515 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 15:21:52,529 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 15:21:52,574 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 15:21:52,574 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 15:21:52,576 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:21:52,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:21:52,577 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 15:21:52,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-08-27 15:21:52,587 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 15:21:52,587 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 15:21:52,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Ended with exit code 0 [2021-08-27 15:21:52,621 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:21:52,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:21:52,633 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 15:21:52,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-08-27 15:21:52,636 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 15:21:52,636 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 15:21:52,677 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 15:21:52,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-08-27 15:21:52,681 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 15:21:52,681 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 15:21:52,681 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 15:21:52,681 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 15:21:52,681 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 15:21:52,681 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:21:52,681 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 15:21:52,681 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 15:21:52,681 INFO L133 ssoRankerPreferences]: Filename of dumped script: fragtest_simple.i_Iteration1_Loop [2021-08-27 15:21:52,681 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 15:21:52,682 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 15:21:52,682 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 15:21:52,695 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 15:21:52,734 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 15:21:52,737 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 15:21:52,738 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:21:52,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:21:52,738 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 15:21:52,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-08-27 15:21:52,741 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 15:21:52,748 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 15:21:52,749 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 15:21:52,749 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 15:21:52,749 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 15:21:52,749 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 15:21:52,751 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 15:21:52,751 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 15:21:52,773 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 15:21:52,777 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-08-27 15:21:52,778 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-08-27 15:21:52,779 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:21:52,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:21:52,789 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 15:21:52,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-08-27 15:21:52,791 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 15:21:52,791 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 15:21:52,792 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 15:21:52,792 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = -2*ULTIMATE.start_main_~i~0 + 2000001 Supporting invariants [] [2021-08-27 15:21:52,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-08-27 15:21:52,811 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 15:21:52,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 15:21:52,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 15:21:52,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 15:21:52,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 15:21:52,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 15:21:52,884 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 15:21:52,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 15:21:52,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 15:21:52,893 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2021-08-27 15:21:52,894 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 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 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 15:21:52,922 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 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 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 32 states and 50 transitions. Complement of second has 6 states. [2021-08-27 15:21:52,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-08-27 15:21:52,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 15:21:52,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 26 transitions. [2021-08-27 15:21:52,927 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 26 transitions. Stem has 2 letters. Loop has 1 letters. [2021-08-27 15:21:52,927 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 15:21:52,927 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 26 transitions. Stem has 3 letters. Loop has 1 letters. [2021-08-27 15:21:52,927 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 15:21:52,927 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 26 transitions. Stem has 2 letters. Loop has 2 letters. [2021-08-27 15:21:52,927 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 15:21:52,927 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 32 states and 50 transitions. [2021-08-27 15:21:52,930 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-08-27 15:21:52,932 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 32 states to 13 states and 19 transitions. [2021-08-27 15:21:52,932 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2021-08-27 15:21:52,932 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2021-08-27 15:21:52,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 19 transitions. [2021-08-27 15:21:52,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-27 15:21:52,933 INFO L681 BuchiCegarLoop]: Abstraction has 13 states and 19 transitions. [2021-08-27 15:21:52,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 19 transitions. [2021-08-27 15:21:52,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-08-27 15:21:52,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 15:21:52,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 19 transitions. [2021-08-27 15:21:52,947 INFO L704 BuchiCegarLoop]: Abstraction has 13 states and 19 transitions. [2021-08-27 15:21:52,947 INFO L587 BuchiCegarLoop]: Abstraction has 13 states and 19 transitions. [2021-08-27 15:21:52,947 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-08-27 15:21:52,947 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states and 19 transitions. [2021-08-27 15:21:52,948 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-08-27 15:21:52,948 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 15:21:52,948 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 15:21:52,948 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2021-08-27 15:21:52,948 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1] [2021-08-27 15:21:52,948 INFO L791 eck$LassoCheckResult]: Stem: 84#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 85#L-1 havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~nondet5, main_~i~0, main_~pvlen~0, main_~tmp___1~0, main_~k~0, main_~n~0, main_~j~0;havoc main_~i~0;havoc main_~pvlen~0;havoc main_~tmp___1~0;main_~k~0 := 0;havoc main_~n~0;main_~i~0 := 0;main_~pvlen~0 := main_#t~nondet3;havoc main_#t~nondet3; 91#L31-2 assume !(0 != main_#t~nondet4 && main_~i~0 <= 1000000);havoc main_#t~nondet4; 92#L31-3 assume !(main_~i~0 > main_~pvlen~0); 89#L34-1 main_~i~0 := 0; 90#L38-2 [2021-08-27 15:21:52,948 INFO L793 eck$LassoCheckResult]: Loop: 90#L38-2 assume !!(0 != main_#t~nondet5 && main_~i~0 <= 1000000);havoc main_#t~nondet5;main_~tmp___1~0 := main_~i~0;main_~i~0 := 1 + main_~i~0;main_~k~0 := 1 + main_~k~0; 90#L38-2 [2021-08-27 15:21:52,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 15:21:52,949 INFO L82 PathProgramCache]: Analyzing trace with hash 28697992, now seen corresponding path program 1 times [2021-08-27 15:21:52,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 15:21:52,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997714621] [2021-08-27 15:21:52,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 15:21:52,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 15:21:52,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:21:52,955 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 15:21:52,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:21:52,962 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 15:21:52,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 15:21:52,962 INFO L82 PathProgramCache]: Analyzing trace with hash 61, now seen corresponding path program 1 times [2021-08-27 15:21:52,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 15:21:52,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149874140] [2021-08-27 15:21:52,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 15:21:52,962 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 15:21:52,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:21:52,965 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 15:21:52,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:21:52,967 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 15:21:52,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 15:21:52,967 INFO L82 PathProgramCache]: Analyzing trace with hash 889637782, now seen corresponding path program 1 times [2021-08-27 15:21:52,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 15:21:52,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987267359] [2021-08-27 15:21:52,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 15:21:52,968 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 15:21:52,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:21:52,973 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 15:21:52,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:21:52,981 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 15:21:53,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-08-27 15:21:53,044 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 15:21:53,045 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 15:21:53,045 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 15:21:53,045 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 15:21:53,045 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 15:21:53,045 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:21:53,045 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 15:21:53,045 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 15:21:53,045 INFO L133 ssoRankerPreferences]: Filename of dumped script: fragtest_simple.i_Iteration2_Loop [2021-08-27 15:21:53,045 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 15:21:53,045 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 15:21:53,046 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 15:21:53,050 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 15:21:53,058 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 15:21:53,108 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 15:21:53,109 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 15:21:53,109 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:21:53,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:21:53,110 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 15:21:53,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-08-27 15:21:53,121 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 15:21:53,121 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 15:21:53,135 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 15:21:53,135 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~nondet5=4} Honda state: {ULTIMATE.start_main_#t~nondet5=4} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 15:21:53,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-08-27 15:21:53,151 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:21:53,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:21:53,152 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 15:21:53,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-08-27 15:21:53,156 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 15:21:53,156 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 15:21:53,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-08-27 15:21:53,188 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:21:53,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:21:53,188 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 15:21:53,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-08-27 15:21:53,192 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 15:21:53,192 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 15:21:53,235 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 15:21:53,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-08-27 15:21:53,241 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 15:21:53,241 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 15:21:53,241 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 15:21:53,241 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 15:21:53,241 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 15:21:53,241 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:21:53,241 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 15:21:53,241 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 15:21:53,241 INFO L133 ssoRankerPreferences]: Filename of dumped script: fragtest_simple.i_Iteration2_Loop [2021-08-27 15:21:53,241 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 15:21:53,241 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 15:21:53,242 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 15:21:53,247 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 15:21:53,257 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 15:21:53,307 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 15:21:53,307 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 15:21:53,307 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:21:53,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:21:53,308 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 15:21:53,317 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 15:21:53,324 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 15:21:53,324 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 15:21:53,324 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 15:21:53,324 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-08-27 15:21:53,324 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 15:21:53,326 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2021-08-27 15:21:53,326 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 15:21:53,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-08-27 15:21:53,327 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 15:21:53,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-08-27 15:21:53,345 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:21:53,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:21:53,345 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 15:21:53,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-08-27 15:21:53,348 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 15:21:53,355 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 15:21:53,355 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 15:21:53,356 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 15:21:53,356 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 15:21:53,356 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 15:21:53,357 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 15:21:53,357 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 15:21:53,359 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 15:21:53,367 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-08-27 15:21:53,367 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-08-27 15:21:53,367 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:21:53,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:21:53,368 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 15:21:53,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-08-27 15:21:53,371 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 15:21:53,371 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 15:21:53,371 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 15:21:53,371 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = -2*ULTIMATE.start_main_~i~0 + 2000001 Supporting invariants [] [2021-08-27 15:21:53,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-08-27 15:21:53,391 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 15:21:53,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 15:21:53,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 15:21:53,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 15:21:53,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 15:21:53,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-08-27 15:21:53,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 15:21:53,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 15:21:53,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 15:21:53,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 15:21:53,477 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2021-08-27 15:21:53,477 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 13 states and 19 transitions. cyclomatic complexity: 9 Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 15:21:53,497 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 13 states and 19 transitions. cyclomatic complexity: 9. Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 29 states and 40 transitions. Complement of second has 6 states. [2021-08-27 15:21:53,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-08-27 15:21:53,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 15:21:53,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 22 transitions. [2021-08-27 15:21:53,499 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 22 transitions. Stem has 5 letters. Loop has 1 letters. [2021-08-27 15:21:53,499 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 15:21:53,499 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 22 transitions. Stem has 6 letters. Loop has 1 letters. [2021-08-27 15:21:53,499 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 15:21:53,499 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 22 transitions. Stem has 5 letters. Loop has 2 letters. [2021-08-27 15:21:53,499 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 15:21:53,500 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 29 states and 40 transitions. [2021-08-27 15:21:53,501 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-08-27 15:21:53,501 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 29 states to 17 states and 23 transitions. [2021-08-27 15:21:53,501 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 14 [2021-08-27 15:21:53,501 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 15 [2021-08-27 15:21:53,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 23 transitions. [2021-08-27 15:21:53,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-27 15:21:53,501 INFO L681 BuchiCegarLoop]: Abstraction has 17 states and 23 transitions. [2021-08-27 15:21:53,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states and 23 transitions. [2021-08-27 15:21:53,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-08-27 15:21:53,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 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) [2021-08-27 15:21:53,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2021-08-27 15:21:53,502 INFO L704 BuchiCegarLoop]: Abstraction has 16 states and 22 transitions. [2021-08-27 15:21:53,502 INFO L587 BuchiCegarLoop]: Abstraction has 16 states and 22 transitions. [2021-08-27 15:21:53,502 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-08-27 15:21:53,502 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states and 22 transitions. [2021-08-27 15:21:53,503 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-08-27 15:21:53,503 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 15:21:53,503 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 15:21:53,504 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 15:21:53,504 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-08-27 15:21:53,505 INFO L791 eck$LassoCheckResult]: Stem: 164#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 165#L-1 havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~nondet5, main_~i~0, main_~pvlen~0, main_~tmp___1~0, main_~k~0, main_~n~0, main_~j~0;havoc main_~i~0;havoc main_~pvlen~0;havoc main_~tmp___1~0;main_~k~0 := 0;havoc main_~n~0;main_~i~0 := 0;main_~pvlen~0 := main_#t~nondet3;havoc main_#t~nondet3; 173#L31-2 assume !(0 != main_#t~nondet4 && main_~i~0 <= 1000000);havoc main_#t~nondet4; 174#L31-3 assume !(main_~i~0 > main_~pvlen~0); 169#L34-1 main_~i~0 := 0; 170#L38-2 assume !(0 != main_#t~nondet5 && main_~i~0 <= 1000000);havoc main_#t~nondet5; 167#L38-3 main_~j~0 := 0;main_~n~0 := main_~i~0; 168#L45-2 assume !false;__VERIFIER_assert_#in~cond := (if main_~k~0 >= 0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 162#L18 assume !(0 == __VERIFIER_assert_~cond); 163#L18-2 [2021-08-27 15:21:53,505 INFO L793 eck$LassoCheckResult]: Loop: 163#L18-2 main_~k~0 := main_~k~0 - 1;main_~i~0 := main_~i~0 - 1;main_~j~0 := 1 + main_~j~0; 166#L50 assume !(main_~j~0 >= main_~n~0); 171#L45-2 assume !false;__VERIFIER_assert_#in~cond := (if main_~k~0 >= 0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 172#L18 assume !(0 == __VERIFIER_assert_~cond); 163#L18-2 [2021-08-27 15:21:53,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 15:21:53,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1044045579, now seen corresponding path program 1 times [2021-08-27 15:21:53,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 15:21:53,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762499107] [2021-08-27 15:21:53,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 15:21:53,507 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 15:21:53,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:21:53,531 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 15:21:53,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:21:53,547 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 15:21:53,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 15:21:53,550 INFO L82 PathProgramCache]: Analyzing trace with hash 2559565, now seen corresponding path program 1 times [2021-08-27 15:21:53,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 15:21:53,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860808403] [2021-08-27 15:21:53,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 15:21:53,551 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 15:21:53,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:21:53,556 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 15:21:53,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:21:53,565 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 15:21:53,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 15:21:53,567 INFO L82 PathProgramCache]: Analyzing trace with hash 667587905, now seen corresponding path program 1 times [2021-08-27 15:21:53,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 15:21:53,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098059366] [2021-08-27 15:21:53,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 15:21:53,569 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 15:21:53,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 15:21:53,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 15:21:53,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 15:21:53,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098059366] [2021-08-27 15:21:53,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098059366] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 15:21:53,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 15:21:53,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 15:21:53,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025016555] [2021-08-27 15:21:53,720 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 15:21:53,721 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 15:21:53,721 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 15:21:53,721 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 15:21:53,721 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 15:21:53,721 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:21:53,721 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 15:21:53,721 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 15:21:53,721 INFO L133 ssoRankerPreferences]: Filename of dumped script: fragtest_simple.i_Iteration3_Loop [2021-08-27 15:21:53,721 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 15:21:53,721 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 15:21:53,722 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 15:21:53,730 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 15:21:53,736 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 15:21:53,746 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 15:21:53,819 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 15:21:53,819 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 15:21:53,820 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:21:53,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:21:53,821 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 15:21:53,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-08-27 15:21:53,824 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 15:21:53,824 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 15:21:53,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-08-27 15:21:53,870 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:21:53,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:21:53,871 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 15:21:53,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-08-27 15:21:53,873 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 15:21:53,874 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 15:21:54,122 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 15:21:54,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-08-27 15:21:54,131 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 15:21:54,131 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 15:21:54,131 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 15:21:54,131 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 15:21:54,131 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 15:21:54,131 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:21:54,131 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 15:21:54,131 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 15:21:54,131 INFO L133 ssoRankerPreferences]: Filename of dumped script: fragtest_simple.i_Iteration3_Loop [2021-08-27 15:21:54,131 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 15:21:54,131 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 15:21:54,132 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 15:21:54,136 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 15:21:54,141 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 15:21:54,147 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 15:21:54,190 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 15:21:54,191 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 15:21:54,191 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:21:54,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:21:54,193 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 15:21:54,202 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 15:21:54,208 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 15:21:54,208 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 15:21:54,209 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 15:21:54,209 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 15:21:54,209 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 15:21:54,210 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 15:21:54,210 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 15:21:54,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-08-27 15:21:54,228 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 15:21:54,231 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-08-27 15:21:54,231 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-08-27 15:21:54,231 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:21:54,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:21:54,232 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 15:21:54,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-08-27 15:21:54,234 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 15:21:54,234 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 15:21:54,234 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 15:21:54,234 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~n~0, ULTIMATE.start_main_~j~0) = 1*ULTIMATE.start_main_~n~0 - 1*ULTIMATE.start_main_~j~0 Supporting invariants [] [2021-08-27 15:21:54,249 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Ended with exit code 0 [2021-08-27 15:21:54,250 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 15:21:54,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 15:21:54,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 15:21:54,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 15:21:54,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 15:21:54,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 15:21:54,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 15:21:54,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 15:21:54,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Ended with exit code 0 [2021-08-27 15:21:54,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 15:21:54,396 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2021-08-27 15:21:54,396 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 16 states and 22 transitions. cyclomatic complexity: 9 Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 15:21:54,407 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 16 states and 22 transitions. cyclomatic complexity: 9. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 27 states and 34 transitions. Complement of second has 7 states. [2021-08-27 15:21:54,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-08-27 15:21:54,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 15:21:54,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 25 transitions. [2021-08-27 15:21:54,408 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 9 letters. Loop has 4 letters. [2021-08-27 15:21:54,408 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 15:21:54,408 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 13 letters. Loop has 4 letters. [2021-08-27 15:21:54,408 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 15:21:54,408 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 9 letters. Loop has 8 letters. [2021-08-27 15:21:54,409 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 15:21:54,409 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 34 transitions. [2021-08-27 15:21:54,409 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-08-27 15:21:54,410 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 0 states and 0 transitions. [2021-08-27 15:21:54,410 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-08-27 15:21:54,410 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-08-27 15:21:54,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-08-27 15:21:54,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-27 15:21:54,410 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 15:21:54,410 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 15:21:54,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 15:21:54,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 15:21:54,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 15:21:54,413 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 15:21:54,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 15:21:54,414 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2021-08-27 15:21:54,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-27 15:21:54,415 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2021-08-27 15:21:54,415 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-08-27 15:21:54,415 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2021-08-27 15:21:54,415 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-08-27 15:21:54,415 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-08-27 15:21:54,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-08-27 15:21:54,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-27 15:21:54,415 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 15:21:54,415 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 15:21:54,415 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 15:21:54,416 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-08-27 15:21:54,416 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-08-27 15:21:54,416 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-08-27 15:21:54,416 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-08-27 15:21:54,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 27.08 03:21:54 BoogieIcfgContainer [2021-08-27 15:21:54,420 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-08-27 15:21:54,420 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 15:21:54,420 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 15:21:54,420 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 15:21:54,421 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 03:21:52" (3/4) ... [2021-08-27 15:21:54,422 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-27 15:21:54,422 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 15:21:54,423 INFO L168 Benchmark]: Toolchain (without parser) took 2737.45 ms. Allocated memory was 65.0 MB in the beginning and 81.8 MB in the end (delta: 16.8 MB). Free memory was 45.3 MB in the beginning and 53.6 MB in the end (delta: -8.4 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.1 GB. [2021-08-27 15:21:54,424 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 65.0 MB. Free memory is still 46.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 15:21:54,424 INFO L168 Benchmark]: CACSL2BoogieTranslator took 130.58 ms. Allocated memory is still 65.0 MB. Free memory was 45.1 MB in the beginning and 35.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-08-27 15:21:54,424 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.10 ms. Allocated memory is still 65.0 MB. Free memory was 35.5 MB in the beginning and 47.8 MB in the end (delta: -12.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-27 15:21:54,424 INFO L168 Benchmark]: Boogie Preprocessor took 25.02 ms. Allocated memory is still 65.0 MB. Free memory was 47.8 MB in the beginning and 46.7 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 15:21:54,425 INFO L168 Benchmark]: RCFGBuilder took 271.60 ms. Allocated memory is still 65.0 MB. Free memory was 46.7 MB in the beginning and 34.3 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-27 15:21:54,425 INFO L168 Benchmark]: BuchiAutomizer took 2251.83 ms. Allocated memory was 65.0 MB in the beginning and 81.8 MB in the end (delta: 16.8 MB). Free memory was 34.3 MB in the beginning and 54.3 MB in the end (delta: -20.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 15:21:54,425 INFO L168 Benchmark]: Witness Printer took 2.36 ms. Allocated memory is still 81.8 MB. Free memory was 54.3 MB in the beginning and 53.6 MB in the end (delta: 688.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 15:21:54,427 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 65.0 MB. Free memory is still 46.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 130.58 ms. Allocated memory is still 65.0 MB. Free memory was 45.1 MB in the beginning and 35.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 52.10 ms. Allocated memory is still 65.0 MB. Free memory was 35.5 MB in the beginning and 47.8 MB in the end (delta: -12.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.02 ms. Allocated memory is still 65.0 MB. Free memory was 47.8 MB in the beginning and 46.7 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 271.60 ms. Allocated memory is still 65.0 MB. Free memory was 46.7 MB in the beginning and 34.3 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 2251.83 ms. Allocated memory was 65.0 MB in the beginning and 81.8 MB in the end (delta: 16.8 MB). Free memory was 34.3 MB in the beginning and 54.3 MB in the end (delta: -20.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 2.36 ms. Allocated memory is still 81.8 MB. Free memory was 54.3 MB in the beginning and 53.6 MB in the end (delta: 688.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 4 terminating modules (1 trivial, 3 deterministic, 0 nondeterministic). One deterministic module has affine ranking function -2 * i + 2000001 and consists of 4 locations. One deterministic module has affine ranking function -2 * i + 2000001 and consists of 4 locations. One deterministic module has affine ranking function n + -1 * j and consists of 5 locations. 1 modules have a trivial ranking function, the largest among these consists of 5 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 2.2s and 4 iterations. TraceHistogramMax:1. Analysis of lassos took 1.7s. Construction of modules took 0.0s. Büchi inclusion checks took 0.3s. Highest rank in rank-based complementation 3. Minimization of det autom 4. Minimization of nondet autom 0. Automata minimization 7.3ms AutomataMinimizationTime, 2 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 16 states and ocurred in iteration 2. Nontrivial modules had stage [3, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 28 SDtfs, 29 SDslu, 9 SDs, 0 SdLazy, 20 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 17.2ms Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT2 conc0 concLT1 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital21 mio100 ax100 hnf100 lsp55 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq165 hnf92 smp100 dnf100 smp100 tf112 neg100 sie103 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 20ms VariablesStem: 0 VariablesLoop: 1 DisjunctsStem: 1 DisjunctsLoop: 2 SupportingInvariants: 0 MotzkinApplications: 4 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 1 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.5s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-08-27 15:21:54,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...