./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-15/cstrncmp_malloc.i --full-output --architecture 64bit -------------------------------------------------------------------------------- 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/termination-15/cstrncmp_malloc.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-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 64bit --witnessprinter.graph.data.programhash 56be9dfe64f940b7419bf11610ecc3d24973c46d ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 14:32:55,705 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 14:32:55,706 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 14:32:55,735 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 14:32:55,735 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 14:32:55,736 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 14:32:55,737 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 14:32:55,738 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 14:32:55,740 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 14:32:55,740 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 14:32:55,741 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 14:32:55,742 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 14:32:55,742 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 14:32:55,743 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 14:32:55,744 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 14:32:55,748 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 14:32:55,750 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 14:32:55,753 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 14:32:55,754 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 14:32:55,757 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 14:32:55,760 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 14:32:55,761 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 14:32:55,762 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 14:32:55,765 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 14:32:55,766 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 14:32:55,767 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 14:32:55,767 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 14:32:55,767 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 14:32:55,767 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 14:32:55,768 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 14:32:55,768 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 14:32:55,769 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 14:32:55,769 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 14:32:55,770 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 14:32:55,770 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 14:32:55,770 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 14:32:55,771 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 14:32:55,771 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 14:32:55,771 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 14:32:55,772 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 14:32:55,772 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 14:32:55,777 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-08-27 14:32:55,801 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 14:32:55,802 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 14:32:55,802 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 14:32:55,802 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 14:32:55,804 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 14:32:55,804 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 14:32:55,804 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 14:32:55,804 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-08-27 14:32:55,805 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-08-27 14:32:55,805 INFO L138 SettingsManager]: * Use old map elimination=false [2021-08-27 14:32:55,805 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-08-27 14:32:55,806 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-08-27 14:32:55,806 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-08-27 14:32:55,806 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 14:32:55,806 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 14:32:55,806 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 14:32:55,806 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 14:32:55,806 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-08-27 14:32:55,807 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-08-27 14:32:55,807 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-08-27 14:32:55,807 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-27 14:32:55,807 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-08-27 14:32:55,807 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 14:32:55,807 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-08-27 14:32:55,807 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 14:32:55,808 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 14:32:55,808 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 14:32:55,808 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 14:32:55,808 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 14:32:55,809 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-08-27 14:32:55,809 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 56be9dfe64f940b7419bf11610ecc3d24973c46d [2021-08-27 14:32:56,052 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 14:32:56,073 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 14:32:56,075 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 14:32:56,076 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 14:32:56,076 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 14:32:56,077 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-15/cstrncmp_malloc.i [2021-08-27 14:32:56,125 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abd05a09c/d7e6c50d79144c598388b36f54acdfb7/FLAGf7ba65441 [2021-08-27 14:32:56,547 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 14:32:56,548 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-15/cstrncmp_malloc.i [2021-08-27 14:32:56,554 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abd05a09c/d7e6c50d79144c598388b36f54acdfb7/FLAGf7ba65441 [2021-08-27 14:32:56,564 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abd05a09c/d7e6c50d79144c598388b36f54acdfb7 [2021-08-27 14:32:56,566 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 14:32:56,567 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-27 14:32:56,568 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 14:32:56,568 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 14:32:56,571 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 14:32:56,571 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 02:32:56" (1/1) ... [2021-08-27 14:32:56,572 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4321a47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:32:56, skipping insertion in model container [2021-08-27 14:32:56,572 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 02:32:56" (1/1) ... [2021-08-27 14:32:56,576 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 14:32:56,596 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 14:32:56,840 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 14:32:56,852 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 14:32:56,884 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 14:32:56,906 INFO L208 MainTranslator]: Completed translation [2021-08-27 14:32:56,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:32:56 WrapperNode [2021-08-27 14:32:56,906 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 14:32:56,907 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-27 14:32:56,907 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-27 14:32:56,907 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-27 14:32:56,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:32:56" (1/1) ... [2021-08-27 14:32:56,920 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:32:56" (1/1) ... [2021-08-27 14:32:56,933 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-27 14:32:56,934 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 14:32:56,934 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 14:32:56,934 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 14:32:56,939 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:32:56" (1/1) ... [2021-08-27 14:32:56,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:32:56" (1/1) ... [2021-08-27 14:32:56,941 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:32:56" (1/1) ... [2021-08-27 14:32:56,941 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:32:56" (1/1) ... [2021-08-27 14:32:56,944 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:32:56" (1/1) ... [2021-08-27 14:32:56,947 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:32:56" (1/1) ... [2021-08-27 14:32:56,948 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:32:56" (1/1) ... [2021-08-27 14:32:56,949 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 14:32:56,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 14:32:56,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 14:32:56,950 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 14:32:56,951 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:32:56" (1/1) ... [2021-08-27 14:32:56,955 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:32:56,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:32:56,974 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 14:32:57,004 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 14:32:57,017 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-27 14:32:57,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-27 14:32:57,018 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-27 14:32:57,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 14:32:57,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 14:32:57,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 14:32:57,261 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 14:32:57,262 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-08-27 14:32:57,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 02:32:57 BoogieIcfgContainer [2021-08-27 14:32:57,263 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 14:32:57,264 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-08-27 14:32:57,264 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-08-27 14:32:57,266 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-08-27 14:32:57,269 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 14:32:57,269 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 27.08 02:32:56" (1/3) ... [2021-08-27 14:32:57,270 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@fbfdec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.08 02:32:57, skipping insertion in model container [2021-08-27 14:32:57,270 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 14:32:57,270 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:32:56" (2/3) ... [2021-08-27 14:32:57,270 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@fbfdec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.08 02:32:57, skipping insertion in model container [2021-08-27 14:32:57,270 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 14:32:57,270 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 02:32:57" (3/3) ... [2021-08-27 14:32:57,271 INFO L389 chiAutomizerObserver]: Analyzing ICFG cstrncmp_malloc.i [2021-08-27 14:32:57,325 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-08-27 14:32:57,325 INFO L360 BuchiCegarLoop]: Hoare is false [2021-08-27 14:32:57,325 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-08-27 14:32:57,326 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-27 14:32:57,326 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-27 14:32:57,326 INFO L364 BuchiCegarLoop]: Difference is false [2021-08-27 14:32:57,326 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-27 14:32:57,326 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-08-27 14:32:57,336 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 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 14:32:57,346 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-08-27 14:32:57,347 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 14:32:57,347 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 14:32:57,351 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1] [2021-08-27 14:32:57,351 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2021-08-27 14:32:57,351 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-08-27 14:32:57,352 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 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 14:32:57,353 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-08-27 14:32:57,356 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 14:32:57,357 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 14:32:57,357 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1] [2021-08-27 14:32:57,357 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2021-08-27 14:32:57,362 INFO L791 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 8#L-1true havoc main_#res;havoc main_#t~nondet216, main_#t~nondet217, main_#t~malloc218.base, main_#t~malloc218.offset, main_#t~malloc219.base, main_#t~malloc219.offset, main_#t~nondet220, main_#t~ret221, main_~length1~0, main_~length2~0, main_~nondetString1~0.base, main_~nondetString1~0.offset, main_~nondetString2~0.base, main_~nondetString2~0.offset, main_~res~0;main_~length1~0 := main_#t~nondet216;havoc main_#t~nondet216;main_~length2~0 := main_#t~nondet217;havoc main_#t~nondet217; 19#L382true assume !(main_~length1~0 < 1); 14#L382-2true assume !(main_~length2~0 < 1); 5#L385-1true call main_#t~malloc218.base, main_#t~malloc218.offset := #Ultimate.allocOnHeap(main_~length1~0);main_~nondetString1~0.base, main_~nondetString1~0.offset := main_#t~malloc218.base, main_#t~malloc218.offset;havoc main_#t~malloc218.base, main_#t~malloc218.offset;call main_#t~malloc219.base, main_#t~malloc219.offset := #Ultimate.allocOnHeap(main_~length2~0);main_~nondetString2~0.base, main_~nondetString2~0.offset := main_#t~malloc219.base, main_#t~malloc219.offset;havoc main_#t~malloc219.base, main_#t~malloc219.offset;call write~int(0, main_~nondetString1~0.base, main_~nondetString1~0.offset + (main_~length1~0 - 1), 1);call write~int(0, main_~nondetString2~0.base, main_~nondetString2~0.offset + (main_~length2~0 - 1), 1);cstrncmp_#in~s1.base, cstrncmp_#in~s1.offset, cstrncmp_#in~s2.base, cstrncmp_#in~s2.offset, cstrncmp_#in~n := main_~nondetString1~0.base, main_~nondetString1~0.offset, main_~nondetString2~0.base, main_~nondetString2~0.offset, main_#t~nondet220;havoc cstrncmp_#res;havoc cstrncmp_#t~mem209, cstrncmp_#t~short210, cstrncmp_#t~post211.base, cstrncmp_#t~post211.offset, cstrncmp_#t~post212.base, cstrncmp_#t~post212.offset, cstrncmp_#t~post205, cstrncmp_#t~mem206, cstrncmp_#t~mem207, cstrncmp_#t~short208, cstrncmp_#t~mem213, cstrncmp_#t~mem214, cstrncmp_#t~ite215, cstrncmp_~s1.base, cstrncmp_~s1.offset, cstrncmp_~s2.base, cstrncmp_~s2.offset, cstrncmp_~n, cstrncmp_~uc1~0, cstrncmp_~uc2~0;cstrncmp_~s1.base, cstrncmp_~s1.offset := cstrncmp_#in~s1.base, cstrncmp_#in~s1.offset;cstrncmp_~s2.base, cstrncmp_~s2.offset := cstrncmp_#in~s2.base, cstrncmp_#in~s2.offset;cstrncmp_~n := cstrncmp_#in~n;havoc cstrncmp_~uc1~0;havoc cstrncmp_~uc2~0; 12#L367true assume !(0 == cstrncmp_~n); 10#L369-5true [2021-08-27 14:32:57,373 INFO L793 eck$LassoCheckResult]: Loop: 10#L369-5true cstrncmp_#t~post205 := cstrncmp_~n;cstrncmp_~n := cstrncmp_#t~post205 - 1;cstrncmp_#t~short208 := cstrncmp_#t~post205 > 0; 16#L369-1true assume cstrncmp_#t~short208;call cstrncmp_#t~mem206 := read~int(cstrncmp_~s1.base, cstrncmp_~s1.offset, 1);call cstrncmp_#t~mem207 := read~int(cstrncmp_~s2.base, cstrncmp_~s2.offset, 1);cstrncmp_#t~short208 := cstrncmp_#t~mem206 == cstrncmp_#t~mem207; 9#L369-3true assume !!cstrncmp_#t~short208;havoc cstrncmp_#t~post205;havoc cstrncmp_#t~mem206;havoc cstrncmp_#t~mem207;havoc cstrncmp_#t~short208;cstrncmp_#t~short210 := 0 == cstrncmp_~n; 7#L370true assume cstrncmp_#t~short210; 18#L370-2true assume !cstrncmp_#t~short210;havoc cstrncmp_#t~mem209;havoc cstrncmp_#t~short210;cstrncmp_#t~post211.base, cstrncmp_#t~post211.offset := cstrncmp_~s1.base, cstrncmp_~s1.offset;cstrncmp_~s1.base, cstrncmp_~s1.offset := cstrncmp_#t~post211.base, 1 + cstrncmp_#t~post211.offset;havoc cstrncmp_#t~post211.base, cstrncmp_#t~post211.offset;cstrncmp_#t~post212.base, cstrncmp_#t~post212.offset := cstrncmp_~s2.base, cstrncmp_~s2.offset;cstrncmp_~s2.base, cstrncmp_~s2.offset := cstrncmp_#t~post212.base, 1 + cstrncmp_#t~post212.offset;havoc cstrncmp_#t~post212.base, cstrncmp_#t~post212.offset; 10#L369-5true [2021-08-27 14:32:57,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:32:57,379 INFO L82 PathProgramCache]: Analyzing trace with hash 889572238, now seen corresponding path program 1 times [2021-08-27 14:32:57,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:32:57,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992656235] [2021-08-27 14:32:57,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:32:57,391 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:32:57,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:32:57,462 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:32:57,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:32:57,500 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:32:57,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:32:57,502 INFO L82 PathProgramCache]: Analyzing trace with hash 52587176, now seen corresponding path program 1 times [2021-08-27 14:32:57,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:32:57,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550915046] [2021-08-27 14:32:57,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:32:57,503 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:32:57,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 14:32:57,582 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 14:32:57,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 14:32:57,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550915046] [2021-08-27 14:32:57,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550915046] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 14:32:57,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 14:32:57,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-27 14:32:57,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558376732] [2021-08-27 14:32:57,587 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-08-27 14:32:57,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 14:32:57,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-27 14:32:57,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 14:32:57,599 INFO L87 Difference]: Start difference. First operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:32:57,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 14:32:57,629 INFO L93 Difference]: Finished difference Result 19 states and 26 transitions. [2021-08-27 14:32:57,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-27 14:32:57,632 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 19 states and 26 transitions. [2021-08-27 14:32:57,635 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-08-27 14:32:57,638 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 19 states to 11 states and 14 transitions. [2021-08-27 14:32:57,638 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2021-08-27 14:32:57,639 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2021-08-27 14:32:57,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 14 transitions. [2021-08-27 14:32:57,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-27 14:32:57,639 INFO L681 BuchiCegarLoop]: Abstraction has 11 states and 14 transitions. [2021-08-27 14:32:57,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 14 transitions. [2021-08-27 14:32:57,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-08-27 14:32:57,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:32:57,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2021-08-27 14:32:57,657 INFO L704 BuchiCegarLoop]: Abstraction has 11 states and 14 transitions. [2021-08-27 14:32:57,658 INFO L587 BuchiCegarLoop]: Abstraction has 11 states and 14 transitions. [2021-08-27 14:32:57,658 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-08-27 14:32:57,658 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 11 states and 14 transitions. [2021-08-27 14:32:57,660 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-08-27 14:32:57,660 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 14:32:57,660 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 14:32:57,660 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1] [2021-08-27 14:32:57,660 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2021-08-27 14:32:57,661 INFO L791 eck$LassoCheckResult]: Stem: 48#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 49#L-1 havoc main_#res;havoc main_#t~nondet216, main_#t~nondet217, main_#t~malloc218.base, main_#t~malloc218.offset, main_#t~malloc219.base, main_#t~malloc219.offset, main_#t~nondet220, main_#t~ret221, main_~length1~0, main_~length2~0, main_~nondetString1~0.base, main_~nondetString1~0.offset, main_~nondetString2~0.base, main_~nondetString2~0.offset, main_~res~0;main_~length1~0 := main_#t~nondet216;havoc main_#t~nondet216;main_~length2~0 := main_#t~nondet217;havoc main_#t~nondet217; 55#L382 assume !(main_~length1~0 < 1); 56#L382-2 assume !(main_~length2~0 < 1); 50#L385-1 call main_#t~malloc218.base, main_#t~malloc218.offset := #Ultimate.allocOnHeap(main_~length1~0);main_~nondetString1~0.base, main_~nondetString1~0.offset := main_#t~malloc218.base, main_#t~malloc218.offset;havoc main_#t~malloc218.base, main_#t~malloc218.offset;call main_#t~malloc219.base, main_#t~malloc219.offset := #Ultimate.allocOnHeap(main_~length2~0);main_~nondetString2~0.base, main_~nondetString2~0.offset := main_#t~malloc219.base, main_#t~malloc219.offset;havoc main_#t~malloc219.base, main_#t~malloc219.offset;call write~int(0, main_~nondetString1~0.base, main_~nondetString1~0.offset + (main_~length1~0 - 1), 1);call write~int(0, main_~nondetString2~0.base, main_~nondetString2~0.offset + (main_~length2~0 - 1), 1);cstrncmp_#in~s1.base, cstrncmp_#in~s1.offset, cstrncmp_#in~s2.base, cstrncmp_#in~s2.offset, cstrncmp_#in~n := main_~nondetString1~0.base, main_~nondetString1~0.offset, main_~nondetString2~0.base, main_~nondetString2~0.offset, main_#t~nondet220;havoc cstrncmp_#res;havoc cstrncmp_#t~mem209, cstrncmp_#t~short210, cstrncmp_#t~post211.base, cstrncmp_#t~post211.offset, cstrncmp_#t~post212.base, cstrncmp_#t~post212.offset, cstrncmp_#t~post205, cstrncmp_#t~mem206, cstrncmp_#t~mem207, cstrncmp_#t~short208, cstrncmp_#t~mem213, cstrncmp_#t~mem214, cstrncmp_#t~ite215, cstrncmp_~s1.base, cstrncmp_~s1.offset, cstrncmp_~s2.base, cstrncmp_~s2.offset, cstrncmp_~n, cstrncmp_~uc1~0, cstrncmp_~uc2~0;cstrncmp_~s1.base, cstrncmp_~s1.offset := cstrncmp_#in~s1.base, cstrncmp_#in~s1.offset;cstrncmp_~s2.base, cstrncmp_~s2.offset := cstrncmp_#in~s2.base, cstrncmp_#in~s2.offset;cstrncmp_~n := cstrncmp_#in~n;havoc cstrncmp_~uc1~0;havoc cstrncmp_~uc2~0; 51#L367 assume !(0 == cstrncmp_~n); 52#L369-5 [2021-08-27 14:32:57,661 INFO L793 eck$LassoCheckResult]: Loop: 52#L369-5 cstrncmp_#t~post205 := cstrncmp_~n;cstrncmp_~n := cstrncmp_#t~post205 - 1;cstrncmp_#t~short208 := cstrncmp_#t~post205 > 0; 53#L369-1 assume cstrncmp_#t~short208;call cstrncmp_#t~mem206 := read~int(cstrncmp_~s1.base, cstrncmp_~s1.offset, 1);call cstrncmp_#t~mem207 := read~int(cstrncmp_~s2.base, cstrncmp_~s2.offset, 1);cstrncmp_#t~short208 := cstrncmp_#t~mem206 == cstrncmp_#t~mem207; 46#L369-3 assume !!cstrncmp_#t~short208;havoc cstrncmp_#t~post205;havoc cstrncmp_#t~mem206;havoc cstrncmp_#t~mem207;havoc cstrncmp_#t~short208;cstrncmp_#t~short210 := 0 == cstrncmp_~n; 47#L370 assume !cstrncmp_#t~short210;call cstrncmp_#t~mem209 := read~int(cstrncmp_~s1.base, cstrncmp_~s1.offset, 1);cstrncmp_#t~short210 := 0 == cstrncmp_#t~mem209; 54#L370-2 assume !cstrncmp_#t~short210;havoc cstrncmp_#t~mem209;havoc cstrncmp_#t~short210;cstrncmp_#t~post211.base, cstrncmp_#t~post211.offset := cstrncmp_~s1.base, cstrncmp_~s1.offset;cstrncmp_~s1.base, cstrncmp_~s1.offset := cstrncmp_#t~post211.base, 1 + cstrncmp_#t~post211.offset;havoc cstrncmp_#t~post211.base, cstrncmp_#t~post211.offset;cstrncmp_#t~post212.base, cstrncmp_#t~post212.offset := cstrncmp_~s2.base, cstrncmp_~s2.offset;cstrncmp_~s2.base, cstrncmp_~s2.offset := cstrncmp_#t~post212.base, 1 + cstrncmp_#t~post212.offset;havoc cstrncmp_#t~post212.base, cstrncmp_#t~post212.offset; 52#L369-5 [2021-08-27 14:32:57,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:32:57,663 INFO L82 PathProgramCache]: Analyzing trace with hash 889572238, now seen corresponding path program 2 times [2021-08-27 14:32:57,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:32:57,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625981820] [2021-08-27 14:32:57,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:32:57,664 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:32:57,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:32:57,692 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:32:57,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:32:57,706 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:32:57,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:32:57,706 INFO L82 PathProgramCache]: Analyzing trace with hash 52587238, now seen corresponding path program 1 times [2021-08-27 14:32:57,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:32:57,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733736041] [2021-08-27 14:32:57,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:32:57,707 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:32:57,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:32:57,713 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:32:57,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:32:57,719 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:32:57,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:32:57,720 INFO L82 PathProgramCache]: Analyzing trace with hash -2120298631, now seen corresponding path program 1 times [2021-08-27 14:32:57,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:32:57,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173547040] [2021-08-27 14:32:57,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:32:57,720 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:32:57,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:32:57,741 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:32:57,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:32:57,760 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:32:58,515 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 14:32:58,515 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 14:32:58,521 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 14:32:58,521 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 14:32:58,521 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 14:32:58,521 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:32:58,521 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 14:32:58,521 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 14:32:58,521 INFO L133 ssoRankerPreferences]: Filename of dumped script: cstrncmp_malloc.i_Iteration2_Lasso [2021-08-27 14:32:58,521 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 14:32:58,522 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 14:32:58,535 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 14:32:58,538 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 14:32:58,540 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 14:32:58,542 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 14:32:58,552 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 14:32:58,554 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 14:32:58,556 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 14:32:58,559 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 14:32:58,560 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 14:32:58,563 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 14:32:58,565 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 14:32:58,845 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 14:32:58,849 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 14:32:58,852 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 14:32:58,854 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 14:32:58,856 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 14:32:58,858 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 14:32:58,860 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 14:32:58,864 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 14:32:58,866 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 14:32:58,868 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 14:32:58,870 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 14:32:58,872 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 14:32:58,873 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 14:32:58,876 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 14:32:58,888 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 14:32:58,889 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 14:32:58,898 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 14:32:58,900 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 14:32:59,545 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 14:32:59,548 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 14:32:59,549 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:32:59,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:32:59,560 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 14:32:59,563 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 14:32:59,563 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 14:32:59,571 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 14:32:59,571 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 14:32:59,571 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 14:32:59,571 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 14:32:59,571 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 14:32:59,572 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 14:32:59,572 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 14:32:59,574 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 14:32:59,592 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 14:32:59,593 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:32:59,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:32:59,609 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 14:32:59,637 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 14:32:59,641 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 14:32:59,645 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 14:32:59,645 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 14:32:59,645 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 14:32:59,645 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 14:32:59,645 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 14:32:59,645 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 14:32:59,645 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 14:32:59,648 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 14:32:59,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Ended with exit code 0 [2021-08-27 14:32:59,668 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:32:59,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:32:59,670 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 14:32:59,673 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 14:32:59,674 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 14:32:59,681 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 14:32:59,681 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 14:32:59,681 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 14:32:59,681 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 14:32:59,681 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 14:32:59,681 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 14:32:59,681 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 14:32:59,697 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 14:32:59,717 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 14:32:59,717 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:32:59,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:32:59,718 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 14:32:59,719 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 14:32:59,721 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 14:32:59,728 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 14:32:59,728 INFO L203 nArgumentSynthesizer]: 2 stem disjuncts [2021-08-27 14:32:59,728 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 14:32:59,728 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 14:32:59,733 INFO L401 nArgumentSynthesizer]: We have 8 Motzkin's Theorem applications. [2021-08-27 14:32:59,733 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 14:32:59,748 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 14:32:59,769 INFO L443 ModelExtractionUtils]: Simplification made 5 calls to the SMT solver. [2021-08-27 14:32:59,769 INFO L444 ModelExtractionUtils]: 8 out of 13 variables were initially zero. Simplification set additionally 3 variables to zero. [2021-08-27 14:32:59,771 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:32:59,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:32:59,773 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 14:32:59,782 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 14:32:59,790 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 14:32:59,810 INFO L438 nArgumentSynthesizer]: Removed 2 redundant supporting invariants from a total of 2. [2021-08-27 14:32:59,810 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 14:32:59,810 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_cstrncmp_~n) = 1*ULTIMATE.start_cstrncmp_~n Supporting invariants [] [2021-08-27 14:32:59,829 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 14:32:59,852 INFO L297 tatePredicateManager]: 11 out of 11 supporting invariants were superfluous and have been removed [2021-08-27 14:32:59,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:32:59,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 14:32:59,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 14:32:59,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 14:32:59,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 14:32:59,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-27 14:32:59,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 14:33:00,068 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 14:33:00,072 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2021-08-27 14:33:00,072 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 11 states and 14 transitions. cyclomatic complexity: 4 Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:33:00,110 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 11 states and 14 transitions. cyclomatic complexity: 4. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 21 states and 26 transitions. Complement of second has 6 states. [2021-08-27 14:33:00,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-08-27 14:33:00,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:33:00,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 17 transitions. [2021-08-27 14:33:00,117 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 6 letters. Loop has 5 letters. [2021-08-27 14:33:00,118 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 14:33:00,118 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 11 letters. Loop has 5 letters. [2021-08-27 14:33:00,118 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 14:33:00,118 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 6 letters. Loop has 10 letters. [2021-08-27 14:33:00,119 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 14:33:00,119 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 21 states and 26 transitions. [2021-08-27 14:33:00,122 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-08-27 14:33:00,122 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 21 states to 0 states and 0 transitions. [2021-08-27 14:33:00,122 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-08-27 14:33:00,122 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-08-27 14:33:00,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-08-27 14:33:00,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-27 14:33:00,122 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 14:33:00,122 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 14:33:00,122 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 14:33:00,122 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-08-27 14:33:00,122 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-08-27 14:33:00,123 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-08-27 14:33:00,123 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-08-27 14:33:00,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 27.08 02:33:00 BoogieIcfgContainer [2021-08-27 14:33:00,128 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-08-27 14:33:00,128 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 14:33:00,128 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 14:33:00,129 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 14:33:00,129 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 02:32:57" (3/4) ... [2021-08-27 14:33:00,131 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-27 14:33:00,131 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 14:33:00,132 INFO L168 Benchmark]: Toolchain (without parser) took 3564.44 ms. Allocated memory was 60.8 MB in the beginning and 123.7 MB in the end (delta: 62.9 MB). Free memory was 38.9 MB in the beginning and 51.6 MB in the end (delta: -12.7 MB). Peak memory consumption was 49.5 MB. Max. memory is 16.1 GB. [2021-08-27 14:33:00,133 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 60.8 MB. Free memory was 43.4 MB in the beginning and 43.4 MB in the end (delta: 39.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 14:33:00,134 INFO L168 Benchmark]: CACSL2BoogieTranslator took 338.53 ms. Allocated memory is still 60.8 MB. Free memory was 38.7 MB in the beginning and 36.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-08-27 14:33:00,136 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.48 ms. Allocated memory is still 60.8 MB. Free memory was 36.6 MB in the beginning and 34.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 14:33:00,140 INFO L168 Benchmark]: Boogie Preprocessor took 15.16 ms. Allocated memory is still 60.8 MB. Free memory was 34.8 MB in the beginning and 33.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 14:33:00,140 INFO L168 Benchmark]: RCFGBuilder took 313.21 ms. Allocated memory was 60.8 MB in the beginning and 77.6 MB in the end (delta: 16.8 MB). Free memory was 33.4 MB in the beginning and 51.1 MB in the end (delta: -17.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 16.1 GB. [2021-08-27 14:33:00,140 INFO L168 Benchmark]: BuchiAutomizer took 2864.44 ms. Allocated memory was 77.6 MB in the beginning and 123.7 MB in the end (delta: 46.1 MB). Free memory was 51.1 MB in the beginning and 51.6 MB in the end (delta: -459.4 kB). Peak memory consumption was 44.5 MB. Max. memory is 16.1 GB. [2021-08-27 14:33:00,141 INFO L168 Benchmark]: Witness Printer took 2.62 ms. Allocated memory is still 123.7 MB. Free memory is still 51.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 14:33:00,147 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 60.8 MB. Free memory was 43.4 MB in the beginning and 43.4 MB in the end (delta: 39.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 338.53 ms. Allocated memory is still 60.8 MB. Free memory was 38.7 MB in the beginning and 36.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 26.48 ms. Allocated memory is still 60.8 MB. Free memory was 36.6 MB in the beginning and 34.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 15.16 ms. Allocated memory is still 60.8 MB. Free memory was 34.8 MB in the beginning and 33.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 313.21 ms. Allocated memory was 60.8 MB in the beginning and 77.6 MB in the end (delta: 16.8 MB). Free memory was 33.4 MB in the beginning and 51.1 MB in the end (delta: -17.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 2864.44 ms. Allocated memory was 77.6 MB in the beginning and 123.7 MB in the end (delta: 46.1 MB). Free memory was 51.1 MB in the beginning and 51.6 MB in the end (delta: -459.4 kB). Peak memory consumption was 44.5 MB. Max. memory is 16.1 GB. * Witness Printer took 2.62 ms. Allocated memory is still 123.7 MB. Free memory is still 51.6 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 2 terminating modules (1 trivial, 1 deterministic, 0 nondeterministic). One deterministic module has affine ranking function n and consists of 4 locations. 1 modules have a trivial ranking function, the largest among these consists of 3 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 2.8s and 3 iterations. TraceHistogramMax:1. Analysis of lassos took 2.4s. Construction of modules took 0.0s. Büchi inclusion checks took 0.2s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 0. Automata minimization 8.5ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 11 states and ocurred in iteration 1. Nontrivial modules had stage [1, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 34 SDtfs, 12 SDslu, 23 SDs, 0 SdLazy, 15 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 25.3ms Time LassoAnalysisResults: nont0 unkn0 SFLI1 SFLT0 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso1 LassoPreprocessingBenchmarks: Lassos: inital226 mio100 ax100 hnf100 lsp87 ukn83 mio100 lsp47 div100 bol100 ite100 ukn100 eq192 hnf88 smp100 dnf145 smp89 tf100 neg95 sie115 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 92ms VariablesStem: 3 VariablesLoop: 2 DisjunctsStem: 2 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 8 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 14:33:00,180 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 14:33:00,391 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...