./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/array-memsafety/rec_strlen-alloca-1.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/array-memsafety/rec_strlen-alloca-1.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 1915ee2ae984f6ece38fc0dcbac99e0ba37faddf ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 17:39:03,375 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 17:39:03,376 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 17:39:03,396 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 17:39:03,398 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 17:39:03,400 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 17:39:03,402 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 17:39:03,407 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 17:39:03,409 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 17:39:03,414 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 17:39:03,415 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 17:39:03,418 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 17:39:03,418 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 17:39:03,420 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 17:39:03,422 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 17:39:03,423 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 17:39:03,424 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 17:39:03,425 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 17:39:03,428 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 17:39:03,430 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 17:39:03,433 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 17:39:03,434 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 17:39:03,435 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 17:39:03,436 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 17:39:03,439 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 17:39:03,439 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 17:39:03,439 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 17:39:03,440 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 17:39:03,440 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 17:39:03,441 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 17:39:03,442 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 17:39:03,442 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 17:39:03,443 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 17:39:03,444 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 17:39:03,445 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 17:39:03,445 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 17:39:03,445 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 17:39:03,445 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 17:39:03,446 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 17:39:03,447 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 17:39:03,447 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 17:39:03,450 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-08-27 17:39:03,483 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 17:39:03,484 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 17:39:03,484 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 17:39:03,484 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 17:39:03,486 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 17:39:03,486 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 17:39:03,486 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 17:39:03,486 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-08-27 17:39:03,486 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-08-27 17:39:03,487 INFO L138 SettingsManager]: * Use old map elimination=false [2021-08-27 17:39:03,487 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-08-27 17:39:03,487 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-08-27 17:39:03,487 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-08-27 17:39:03,488 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 17:39:03,488 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 17:39:03,488 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 17:39:03,488 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 17:39:03,488 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 17:39:03,488 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 17:39:03,488 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-08-27 17:39:03,489 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-08-27 17:39:03,489 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-08-27 17:39:03,489 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 17:39:03,489 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-27 17:39:03,489 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-08-27 17:39:03,489 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 17:39:03,489 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-08-27 17:39:03,489 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 17:39:03,490 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 17:39:03,490 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 17:39:03,490 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 17:39:03,490 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 17:39:03,491 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-08-27 17:39:03,491 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1915ee2ae984f6ece38fc0dcbac99e0ba37faddf [2021-08-27 17:39:03,748 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 17:39:03,769 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 17:39:03,772 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 17:39:03,772 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 17:39:03,773 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 17:39:03,774 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/rec_strlen-alloca-1.i [2021-08-27 17:39:03,826 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1cb9ba48/b579cab0a687473594a62f395fc6d8a3/FLAG89473d4bd [2021-08-27 17:39:04,222 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 17:39:04,225 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/rec_strlen-alloca-1.i [2021-08-27 17:39:04,239 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1cb9ba48/b579cab0a687473594a62f395fc6d8a3/FLAG89473d4bd [2021-08-27 17:39:04,251 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1cb9ba48/b579cab0a687473594a62f395fc6d8a3 [2021-08-27 17:39:04,253 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 17:39:04,256 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-27 17:39:04,257 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 17:39:04,257 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 17:39:04,259 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 17:39:04,260 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 05:39:04" (1/1) ... [2021-08-27 17:39:04,261 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2365ca08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:39:04, skipping insertion in model container [2021-08-27 17:39:04,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 05:39:04" (1/1) ... [2021-08-27 17:39:04,266 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 17:39:04,298 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 17:39:04,534 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 17:39:04,541 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 17:39:04,570 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 17:39:04,591 INFO L208 MainTranslator]: Completed translation [2021-08-27 17:39:04,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:39:04 WrapperNode [2021-08-27 17:39:04,593 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 17:39:04,594 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-27 17:39:04,594 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-27 17:39:04,594 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-27 17:39:04,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:39:04" (1/1) ... [2021-08-27 17:39:04,616 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:39:04" (1/1) ... [2021-08-27 17:39:04,630 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-27 17:39:04,631 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 17:39:04,631 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 17:39:04,631 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 17:39:04,636 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:39:04" (1/1) ... [2021-08-27 17:39:04,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:39:04" (1/1) ... [2021-08-27 17:39:04,645 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:39:04" (1/1) ... [2021-08-27 17:39:04,646 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:39:04" (1/1) ... [2021-08-27 17:39:04,656 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:39:04" (1/1) ... [2021-08-27 17:39:04,659 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:39:04" (1/1) ... [2021-08-27 17:39:04,661 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:39:04" (1/1) ... [2021-08-27 17:39:04,666 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 17:39:04,667 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 17:39:04,667 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 17:39:04,667 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 17:39:04,668 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:39:04" (1/1) ... [2021-08-27 17:39:04,672 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 17:39:04,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 17:39:04,687 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 17:39:04,700 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 17:39:04,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-27 17:39:04,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-27 17:39:04,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 17:39:04,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 17:39:04,727 INFO L130 BoogieDeclarations]: Found specification of procedure strlen_rec [2021-08-27 17:39:04,727 INFO L138 BoogieDeclarations]: Found implementation of procedure strlen_rec [2021-08-27 17:39:04,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 17:39:04,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 17:39:04,929 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 17:39:04,929 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-08-27 17:39:04,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:39:04 BoogieIcfgContainer [2021-08-27 17:39:04,931 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 17:39:04,931 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-08-27 17:39:04,931 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-08-27 17:39:04,933 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-08-27 17:39:04,934 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 17:39:04,934 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 27.08 05:39:04" (1/3) ... [2021-08-27 17:39:04,934 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7fe8de4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.08 05:39:04, skipping insertion in model container [2021-08-27 17:39:04,935 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 17:39:04,935 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:39:04" (2/3) ... [2021-08-27 17:39:04,935 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7fe8de4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.08 05:39:04, skipping insertion in model container [2021-08-27 17:39:04,935 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 17:39:04,935 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:39:04" (3/3) ... [2021-08-27 17:39:04,949 INFO L389 chiAutomizerObserver]: Analyzing ICFG rec_strlen-alloca-1.i [2021-08-27 17:39:04,982 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-08-27 17:39:04,982 INFO L360 BuchiCegarLoop]: Hoare is false [2021-08-27 17:39:04,982 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-08-27 17:39:04,982 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-27 17:39:04,982 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-27 17:39:04,982 INFO L364 BuchiCegarLoop]: Difference is false [2021-08-27 17:39:04,983 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-27 17:39:04,983 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-08-27 17:39:04,991 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 18 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 17:39:05,003 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 5 [2021-08-27 17:39:05,003 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 17:39:05,003 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 17:39:05,007 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-08-27 17:39:05,007 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-08-27 17:39:05,007 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-08-27 17:39:05,007 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 18 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 17:39:05,008 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 5 [2021-08-27 17:39:05,009 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 17:39:05,009 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 17:39:05,009 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-08-27 17:39:05,009 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-08-27 17:39:05,013 INFO L791 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 7#L-1true havoc main_#res;havoc main_#t~nondet4, main_#t~malloc5.base, main_#t~malloc5.offset, main_#t~nondet7, main_#t~post6, main_~i~0, main_#t~ret8, main_~length1~0, main_~nondetString1~0.base, main_~nondetString1~0.offset;main_~length1~0 := main_#t~nondet4;havoc main_#t~nondet4; 18#L522true assume !(main_~length1~0 < 1); 12#L522-2true call main_#t~malloc5.base, main_#t~malloc5.offset := #Ultimate.allocOnStack(main_~length1~0);main_~nondetString1~0.base, main_~nondetString1~0.offset := main_#t~malloc5.base, main_#t~malloc5.offset;main_~i~0 := 0; 10#L527-3true [2021-08-27 17:39:05,013 INFO L793 eck$LassoCheckResult]: Loop: 10#L527-3true assume !!(main_~i~0 < main_~length1~0 - 1);call write~int(main_#t~nondet7, main_~nondetString1~0.base, main_~nondetString1~0.offset + main_~i~0, 1);havoc main_#t~nondet7; 13#L527-2true main_#t~post6 := main_~i~0;main_~i~0 := 1 + main_#t~post6;havoc main_#t~post6; 10#L527-3true [2021-08-27 17:39:05,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 17:39:05,017 INFO L82 PathProgramCache]: Analyzing trace with hash 925669, now seen corresponding path program 1 times [2021-08-27 17:39:05,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 17:39:05,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365656857] [2021-08-27 17:39:05,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 17:39:05,023 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 17:39:05,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 17:39:05,086 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 17:39:05,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 17:39:05,102 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 17:39:05,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 17:39:05,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1507, now seen corresponding path program 1 times [2021-08-27 17:39:05,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 17:39:05,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029086460] [2021-08-27 17:39:05,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 17:39:05,105 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 17:39:05,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 17:39:05,111 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 17:39:05,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 17:39:05,124 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 17:39:05,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 17:39:05,128 INFO L82 PathProgramCache]: Analyzing trace with hash 889568455, now seen corresponding path program 1 times [2021-08-27 17:39:05,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 17:39:05,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571513383] [2021-08-27 17:39:05,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 17:39:05,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 17:39:05,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 17:39:05,141 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 17:39:05,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 17:39:05,152 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 17:39:05,450 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 17:39:05,451 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 17:39:05,451 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 17:39:05,451 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 17:39:05,451 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 17:39:05,451 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 17:39:05,456 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 17:39:05,457 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 17:39:05,457 INFO L133 ssoRankerPreferences]: Filename of dumped script: rec_strlen-alloca-1.i_Iteration1_Lasso [2021-08-27 17:39:05,457 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 17:39:05,457 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 17:39:05,469 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 17:39:05,473 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 17:39:05,475 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 17:39:05,537 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 17:39:05,539 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 17:39:05,541 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 17:39:05,543 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 17:39:05,546 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 17:39:05,548 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 17:39:05,550 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 17:39:05,703 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 17:39:05,705 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 17:39:05,707 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 17:39:05,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 17:39:05,708 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 17:39:05,719 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 17:39:05,727 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 17:39:05,727 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 17:39:05,727 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 17:39:05,727 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 17:39:05,727 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 17:39:05,729 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 17:39:05,729 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 17:39:05,731 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 17:39:05,741 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 17:39:05,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-08-27 17:39:05,761 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 17:39:05,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 17:39:05,763 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 17:39:05,765 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 17:39:05,766 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 17:39:05,773 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 17:39:05,773 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 17:39:05,773 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 17:39:05,773 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 17:39:05,773 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 17:39:05,775 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 17:39:05,775 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 17:39:05,788 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 17:39:05,806 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 17:39:05,807 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 17:39:05,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 17:39:05,808 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 17:39:05,810 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 17:39:05,811 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 17:39:05,818 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 17:39:05,818 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 17:39:05,818 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 17:39:05,818 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 17:39:05,823 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 17:39:05,824 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 17:39:05,840 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 17:39:05,857 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 17:39:05,857 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 17:39:05,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 17:39:05,858 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 17:39:05,869 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 17:39:05,870 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 17:39:05,876 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 17:39:05,876 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 17:39:05,877 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 17:39:05,877 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 17:39:05,877 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 17:39:05,877 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 17:39:05,877 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 17:39:05,892 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 17:39:05,909 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 17:39:05,909 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 17:39:05,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 17:39:05,910 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 17:39:05,919 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 17:39:05,926 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 17:39:05,926 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 17:39:05,926 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 17:39:05,926 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 17:39:05,933 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 17:39:05,933 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 17:39:05,941 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 17:39:05,947 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 17:39:05,998 INFO L443 ModelExtractionUtils]: Simplification made 9 calls to the SMT solver. [2021-08-27 17:39:05,998 INFO L444 ModelExtractionUtils]: 6 out of 22 variables were initially zero. Simplification set additionally 13 variables to zero. [2021-08-27 17:39:05,999 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 17:39:06,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 17:39:06,001 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 17:39:06,001 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 17:39:06,002 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 17:39:06,030 INFO L438 nArgumentSynthesizer]: Removed 2 redundant supporting invariants from a total of 2. [2021-08-27 17:39:06,030 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 17:39:06,030 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~length1~0, ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~length1~0 - 1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2021-08-27 17:39:06,059 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 17:39:06,077 INFO L297 tatePredicateManager]: 3 out of 3 supporting invariants were superfluous and have been removed [2021-08-27 17:39:06,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 17:39:06,117 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 17:39:06,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 17:39:06,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 17:39:06,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 17:39:06,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 17:39:06,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 17:39:06,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 17:39:06,185 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 17:39:06,194 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-08-27 17:39:06,196 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 18 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 17:39:06,236 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 18 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2). Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 34 states and 43 transitions. Complement of second has 9 states. [2021-08-27 17:39:06,237 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 17:39:06,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 17:39:06,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 23 transitions. [2021-08-27 17:39:06,240 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 23 transitions. Stem has 4 letters. Loop has 2 letters. [2021-08-27 17:39:06,241 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 17:39:06,241 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 23 transitions. Stem has 6 letters. Loop has 2 letters. [2021-08-27 17:39:06,241 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 17:39:06,241 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 23 transitions. Stem has 4 letters. Loop has 4 letters. [2021-08-27 17:39:06,242 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 17:39:06,242 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 34 states and 43 transitions. [2021-08-27 17:39:06,246 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-08-27 17:39:06,250 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 34 states to 12 states and 15 transitions. [2021-08-27 17:39:06,251 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2021-08-27 17:39:06,251 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2021-08-27 17:39:06,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 15 transitions. [2021-08-27 17:39:06,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-27 17:39:06,252 INFO L681 BuchiCegarLoop]: Abstraction has 12 states and 15 transitions. [2021-08-27 17:39:06,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states and 15 transitions. [2021-08-27 17:39:06,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-08-27 17:39:06,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 17:39:06,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2021-08-27 17:39:06,268 INFO L704 BuchiCegarLoop]: Abstraction has 12 states and 15 transitions. [2021-08-27 17:39:06,268 INFO L587 BuchiCegarLoop]: Abstraction has 12 states and 15 transitions. [2021-08-27 17:39:06,268 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-08-27 17:39:06,269 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 15 transitions. [2021-08-27 17:39:06,269 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-08-27 17:39:06,269 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 17:39:06,269 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 17:39:06,269 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-27 17:39:06,270 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-08-27 17:39:06,270 INFO L791 eck$LassoCheckResult]: Stem: 111#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 112#L-1 havoc main_#res;havoc main_#t~nondet4, main_#t~malloc5.base, main_#t~malloc5.offset, main_#t~nondet7, main_#t~post6, main_~i~0, main_#t~ret8, main_~length1~0, main_~nondetString1~0.base, main_~nondetString1~0.offset;main_~length1~0 := main_#t~nondet4;havoc main_#t~nondet4; 122#L522 assume !(main_~length1~0 < 1); 113#L522-2 call main_#t~malloc5.base, main_#t~malloc5.offset := #Ultimate.allocOnStack(main_~length1~0);main_~nondetString1~0.base, main_~nondetString1~0.offset := main_#t~malloc5.base, main_#t~malloc5.offset;main_~i~0 := 0; 114#L527-3 assume !(main_~i~0 < main_~length1~0 - 1); 121#L527-4 call write~int(0, main_~nondetString1~0.base, main_~nondetString1~0.offset + (main_~length1~0 - 1), 1); 119#L533 call main_#t~ret8 := strlen_rec(main_~nondetString1~0.base, main_~nondetString1~0.offset);< 117#strlen_recENTRY [2021-08-27 17:39:06,270 INFO L793 eck$LassoCheckResult]: Loop: 117#strlen_recENTRY ~p.base, ~p.offset := #in~p.base, #in~p.offset;call #t~mem2 := read~int(~p.base, ~p.offset, 1); 120#L515 assume !(0 == #t~mem2);havoc #t~mem2; 118#L518 call #t~ret3 := strlen_rec(~p.base, 1 + ~p.offset);< 117#strlen_recENTRY [2021-08-27 17:39:06,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 17:39:06,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1806816568, now seen corresponding path program 1 times [2021-08-27 17:39:06,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 17:39:06,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281498908] [2021-08-27 17:39:06,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 17:39:06,271 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 17:39:06,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 17:39:06,280 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 17:39:06,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 17:39:06,292 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 17:39:06,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 17:39:06,297 INFO L82 PathProgramCache]: Analyzing trace with hash 58722, now seen corresponding path program 1 times [2021-08-27 17:39:06,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 17:39:06,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322194199] [2021-08-27 17:39:06,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 17:39:06,297 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 17:39:06,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 17:39:06,301 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 17:39:06,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 17:39:06,305 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 17:39:06,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 17:39:06,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1952714549, now seen corresponding path program 1 times [2021-08-27 17:39:06,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 17:39:06,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896260727] [2021-08-27 17:39:06,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 17:39:06,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 17:39:06,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 17:39:06,450 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 17:39:06,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 17:39:06,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896260727] [2021-08-27 17:39:06,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896260727] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 17:39:06,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 17:39:06,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-27 17:39:06,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270933022] [2021-08-27 17:39:06,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 17:39:06,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 17:39:06,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-27 17:39:06,562 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. cyclomatic complexity: 5 Second operand has 8 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 7 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 17:39:06,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 17:39:06,637 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2021-08-27 17:39:06,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 17:39:06,637 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 17 states and 19 transitions. [2021-08-27 17:39:06,639 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-08-27 17:39:06,640 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 17 states to 13 states and 15 transitions. [2021-08-27 17:39:06,640 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2021-08-27 17:39:06,640 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2021-08-27 17:39:06,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 15 transitions. [2021-08-27 17:39:06,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-27 17:39:06,640 INFO L681 BuchiCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-08-27 17:39:06,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 15 transitions. [2021-08-27 17:39:06,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2021-08-27 17:39:06,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 17:39:06,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-08-27 17:39:06,643 INFO L704 BuchiCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-08-27 17:39:06,643 INFO L587 BuchiCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-08-27 17:39:06,643 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-08-27 17:39:06,643 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 14 transitions. [2021-08-27 17:39:06,644 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-08-27 17:39:06,644 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 17:39:06,644 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 17:39:06,644 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 17:39:06,644 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-08-27 17:39:06,644 INFO L791 eck$LassoCheckResult]: Stem: 159#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 160#L-1 havoc main_#res;havoc main_#t~nondet4, main_#t~malloc5.base, main_#t~malloc5.offset, main_#t~nondet7, main_#t~post6, main_~i~0, main_#t~ret8, main_~length1~0, main_~nondetString1~0.base, main_~nondetString1~0.offset;main_~length1~0 := main_#t~nondet4;havoc main_#t~nondet4; 170#L522 assume !(main_~length1~0 < 1); 161#L522-2 call main_#t~malloc5.base, main_#t~malloc5.offset := #Ultimate.allocOnStack(main_~length1~0);main_~nondetString1~0.base, main_~nondetString1~0.offset := main_#t~malloc5.base, main_#t~malloc5.offset;main_~i~0 := 0; 162#L527-3 assume !!(main_~i~0 < main_~length1~0 - 1);call write~int(main_#t~nondet7, main_~nondetString1~0.base, main_~nondetString1~0.offset + main_~i~0, 1);havoc main_#t~nondet7; 163#L527-2 main_#t~post6 := main_~i~0;main_~i~0 := 1 + main_#t~post6;havoc main_#t~post6; 164#L527-3 assume !(main_~i~0 < main_~length1~0 - 1); 169#L527-4 call write~int(0, main_~nondetString1~0.base, main_~nondetString1~0.offset + (main_~length1~0 - 1), 1); 166#L533 call main_#t~ret8 := strlen_rec(main_~nondetString1~0.base, main_~nondetString1~0.offset);< 165#strlen_recENTRY [2021-08-27 17:39:06,645 INFO L793 eck$LassoCheckResult]: Loop: 165#strlen_recENTRY ~p.base, ~p.offset := #in~p.base, #in~p.offset;call #t~mem2 := read~int(~p.base, ~p.offset, 1); 168#L515 assume !(0 == #t~mem2);havoc #t~mem2; 167#L518 call #t~ret3 := strlen_rec(~p.base, 1 + ~p.offset);< 165#strlen_recENTRY [2021-08-27 17:39:06,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 17:39:06,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1185641750, now seen corresponding path program 1 times [2021-08-27 17:39:06,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 17:39:06,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374542384] [2021-08-27 17:39:06,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 17:39:06,646 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 17:39:06,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 17:39:06,660 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 17:39:06,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 17:39:06,670 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 17:39:06,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 17:39:06,670 INFO L82 PathProgramCache]: Analyzing trace with hash 58722, now seen corresponding path program 2 times [2021-08-27 17:39:06,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 17:39:06,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942300436] [2021-08-27 17:39:06,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 17:39:06,671 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 17:39:06,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 17:39:06,684 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 17:39:06,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 17:39:06,688 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 17:39:06,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 17:39:06,689 INFO L82 PathProgramCache]: Analyzing trace with hash -357639123, now seen corresponding path program 1 times [2021-08-27 17:39:06,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 17:39:06,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260281576] [2021-08-27 17:39:06,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 17:39:06,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 17:39:06,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 17:39:06,699 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 17:39:06,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 17:39:06,710 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 17:39:07,069 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 17:39:07,069 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 17:39:07,069 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 17:39:07,069 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 17:39:07,069 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 17:39:07,069 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 17:39:07,069 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 17:39:07,069 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 17:39:07,069 INFO L133 ssoRankerPreferences]: Filename of dumped script: rec_strlen-alloca-1.i_Iteration3_Lasso [2021-08-27 17:39:07,069 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 17:39:07,069 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 17:39:07,071 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 17:39:07,073 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 17:39:07,109 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 17:39:07,114 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 17:39:07,116 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 17:39:07,117 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 17:39:07,120 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 17:39:07,121 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 17:39:07,123 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 17:39:07,125 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 17:39:07,127 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 17:39:07,128 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 17:39:07,130 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 17:39:07,132 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 17:39:07,134 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 17:39:07,135 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 17:39:07,137 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 17:39:07,139 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 17:39:07,140 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 17:39:07,142 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 17:39:07,144 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 17:39:07,146 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 17:39:07,147 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 17:39:07,149 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 17:39:07,151 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 17:39:07,153 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 17:39:07,155 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 17:39:07,156 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 17:39:07,305 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 17:39:07,305 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 17:39:07,306 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 17:39:07,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 17:39:07,307 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 17:39:07,308 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 17:39:07,309 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 17:39:07,315 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 17:39:07,316 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 17:39:07,316 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 17:39:07,316 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 17:39:07,316 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 17:39:07,316 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 17:39:07,316 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 17:39:07,324 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 17:39:07,340 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 17:39:07,340 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 17:39:07,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 17:39:07,341 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 17:39:07,342 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 17:39:07,343 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 17:39:07,350 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 17:39:07,350 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 17:39:07,350 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 17:39:07,350 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 17:39:07,351 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 17:39:07,351 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 17:39:07,369 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 17:39:07,386 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 17:39:07,387 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 17:39:07,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 17:39:07,388 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 17:39:07,388 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 17:39:07,390 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 17:39:07,396 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 17:39:07,396 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 17:39:07,396 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 17:39:07,397 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 17:39:07,399 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 17:39:07,399 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 17:39:07,416 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 17:39:07,433 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 17:39:07,433 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 17:39:07,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 17:39:07,441 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 17:39:07,449 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 17:39:07,456 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 17:39:07,456 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 17:39:07,456 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 17:39:07,456 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-08-27 17:39:07,456 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 17:39:07,457 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2021-08-27 17:39:07,457 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 17:39:07,460 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 17:39:07,468 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 17:39:07,484 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 17:39:07,485 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 17:39:07,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 17:39:07,485 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 17:39:07,486 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 17:39:07,487 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 17:39:07,493 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 17:39:07,493 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 17:39:07,494 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 17:39:07,494 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 17:39:07,497 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 17:39:07,497 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 17:39:07,511 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 17:39:07,520 INFO L443 ModelExtractionUtils]: Simplification made 7 calls to the SMT solver. [2021-08-27 17:39:07,520 INFO L444 ModelExtractionUtils]: 0 out of 10 variables were initially zero. Simplification set additionally 7 variables to zero. [2021-08-27 17:39:07,520 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 17:39:07,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 17:39:07,525 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 17:39:07,535 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 17:39:07,546 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 17:39:07,560 INFO L438 nArgumentSynthesizer]: Removed 2 redundant supporting invariants from a total of 2. [2021-08-27 17:39:07,560 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 17:39:07,560 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(strlen_rec_#in~p.offset, v_rep(select #length strlen_rec_#in~p.base)_1) = -1*strlen_rec_#in~p.offset + 1*v_rep(select #length strlen_rec_#in~p.base)_1 Supporting invariants [] [2021-08-27 17:39:07,576 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 17:39:07,578 INFO L297 tatePredicateManager]: 1 out of 1 supporting invariants were superfluous and have been removed [2021-08-27 17:39:07,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 17:39:07,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 17:39:07,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 17:39:07,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 17:39:07,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 17:39:07,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-27 17:39:07,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 17:39:07,663 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 17:39:07,664 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-08-27 17:39:07,664 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 14 transitions. cyclomatic complexity: 4 Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 17:39:07,679 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 12 states and 14 transitions. cyclomatic complexity: 4. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 19 states and 21 transitions. Complement of second has 7 states. [2021-08-27 17:39:07,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-08-27 17:39:07,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 17:39:07,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 13 transitions. [2021-08-27 17:39:07,680 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 13 transitions. Stem has 9 letters. Loop has 3 letters. [2021-08-27 17:39:07,681 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 17:39:07,681 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 13 transitions. Stem has 12 letters. Loop has 3 letters. [2021-08-27 17:39:07,681 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 17:39:07,681 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 13 transitions. Stem has 9 letters. Loop has 6 letters. [2021-08-27 17:39:07,681 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 17:39:07,681 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 19 states and 21 transitions. [2021-08-27 17:39:07,682 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-08-27 17:39:07,682 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 19 states to 0 states and 0 transitions. [2021-08-27 17:39:07,682 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-08-27 17:39:07,682 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-08-27 17:39:07,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-08-27 17:39:07,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-27 17:39:07,682 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 17:39:07,682 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 17:39:07,682 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 17:39:07,683 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-08-27 17:39:07,683 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-08-27 17:39:07,683 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-08-27 17:39:07,683 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-08-27 17:39:07,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 27.08 05:39:07 BoogieIcfgContainer [2021-08-27 17:39:07,687 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-08-27 17:39:07,687 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 17:39:07,687 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 17:39:07,687 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 17:39:07,688 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:39:04" (3/4) ... [2021-08-27 17:39:07,689 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-27 17:39:07,689 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 17:39:07,691 INFO L168 Benchmark]: Toolchain (without parser) took 3434.50 ms. Allocated memory was 69.2 MB in the beginning and 109.1 MB in the end (delta: 39.8 MB). Free memory was 47.6 MB in the beginning and 46.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 41.1 MB. Max. memory is 16.1 GB. [2021-08-27 17:39:07,691 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 69.2 MB. Free memory was 49.8 MB in the beginning and 49.8 MB in the end (delta: 39.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 17:39:07,691 INFO L168 Benchmark]: CACSL2BoogieTranslator took 336.60 ms. Allocated memory is still 69.2 MB. Free memory was 47.4 MB in the beginning and 46.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-27 17:39:07,692 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.42 ms. Allocated memory is still 69.2 MB. Free memory was 45.9 MB in the beginning and 44.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 17:39:07,692 INFO L168 Benchmark]: Boogie Preprocessor took 35.22 ms. Allocated memory is still 69.2 MB. Free memory was 44.3 MB in the beginning and 43.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 17:39:07,692 INFO L168 Benchmark]: RCFGBuilder took 264.21 ms. Allocated memory is still 69.2 MB. Free memory was 43.0 MB in the beginning and 48.6 MB in the end (delta: -5.6 MB). Peak memory consumption was 16.2 MB. Max. memory is 16.1 GB. [2021-08-27 17:39:07,693 INFO L168 Benchmark]: BuchiAutomizer took 2755.42 ms. Allocated memory was 69.2 MB in the beginning and 109.1 MB in the end (delta: 39.8 MB). Free memory was 48.3 MB in the beginning and 46.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 40.2 MB. Max. memory is 16.1 GB. [2021-08-27 17:39:07,697 INFO L168 Benchmark]: Witness Printer took 2.40 ms. Allocated memory is still 109.1 MB. Free memory is still 46.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 17:39:07,702 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 69.2 MB. Free memory was 49.8 MB in the beginning and 49.8 MB in the end (delta: 39.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 336.60 ms. Allocated memory is still 69.2 MB. Free memory was 47.4 MB in the beginning and 46.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.42 ms. Allocated memory is still 69.2 MB. Free memory was 45.9 MB in the beginning and 44.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 35.22 ms. Allocated memory is still 69.2 MB. Free memory was 44.3 MB in the beginning and 43.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 264.21 ms. Allocated memory is still 69.2 MB. Free memory was 43.0 MB in the beginning and 48.6 MB in the end (delta: -5.6 MB). Peak memory consumption was 16.2 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 2755.42 ms. Allocated memory was 69.2 MB in the beginning and 109.1 MB in the end (delta: 39.8 MB). Free memory was 48.3 MB in the beginning and 46.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 40.2 MB. Max. memory is 16.1 GB. * Witness Printer took 2.40 ms. Allocated memory is still 109.1 MB. Free memory is still 46.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 3 terminating modules (1 trivial, 2 deterministic, 0 nondeterministic). One deterministic module has affine ranking function length1 + -1 * i and consists of 5 locations. One deterministic module has affine ranking function -1 * p + unknown-#length-unknown[p] and consists of 3 locations. 1 modules have a trivial ranking function, the largest among these consists of 8 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 2.7s and 4 iterations. TraceHistogramMax:1. Analysis of lassos took 2.2s. Construction of modules took 0.0s. Büchi inclusion checks took 0.3s. Highest rank in rank-based complementation 3. Minimization of det autom 3. Minimization of nondet autom 0. Automata minimization 8.5ms AutomataMinimizationTime, 2 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 12 states and ocurred in iteration 1. Nontrivial modules had stage [2, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 25 SDtfs, 31 SDslu, 21 SDs, 0 SdLazy, 58 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 36.8ms Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT0 conc1 concLT0 SILN0 SILU0 SILI0 SILT0 lasso2 LassoPreprocessingBenchmarks: Lassos: inital93 mio100 ax119 hnf100 lsp78 ukn72 mio100 lsp58 div100 bol100 ite100 ukn100 eq164 hnf91 smp100 dnf100 smp100 tf100 neg100 sie103 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 33ms VariablesStem: 3 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 0 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-08-27 17:39:07,727 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 17:39:07,940 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...