./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-restricted-15/AlternKonv.c --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-restricted-15/AlternKonv.c -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 475cf88887990488194ca7f61a6d05f74a450e7b ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 14:09:47,592 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 14:09:47,594 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 14:09:47,624 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 14:09:47,625 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 14:09:47,627 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 14:09:47,628 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 14:09:47,632 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 14:09:47,633 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 14:09:47,636 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 14:09:47,637 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 14:09:47,650 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 14:09:47,650 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 14:09:47,652 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 14:09:47,654 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 14:09:47,656 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 14:09:47,657 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 14:09:47,658 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 14:09:47,659 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 14:09:47,663 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 14:09:47,664 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 14:09:47,665 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 14:09:47,667 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 14:09:47,667 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 14:09:47,672 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 14:09:47,672 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 14:09:47,672 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 14:09:47,673 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 14:09:47,673 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 14:09:47,674 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 14:09:47,674 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 14:09:47,675 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 14:09:47,676 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 14:09:47,676 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 14:09:47,677 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 14:09:47,677 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 14:09:47,678 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 14:09:47,678 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 14:09:47,678 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 14:09:47,679 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 14:09:47,680 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 14:09:47,683 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-08-27 14:09:47,701 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 14:09:47,701 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 14:09:47,702 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 14:09:47,702 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 14:09:47,703 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 14:09:47,704 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 14:09:47,704 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 14:09:47,704 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-08-27 14:09:47,704 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-08-27 14:09:47,704 INFO L138 SettingsManager]: * Use old map elimination=false [2021-08-27 14:09:47,705 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-08-27 14:09:47,705 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-08-27 14:09:47,705 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-08-27 14:09:47,705 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 14:09:47,705 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 14:09:47,705 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 14:09:47,705 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 14:09:47,705 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-08-27 14:09:47,705 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-08-27 14:09:47,706 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-08-27 14:09:47,706 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-27 14:09:47,706 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-08-27 14:09:47,706 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 14:09:47,706 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-08-27 14:09:47,706 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 14:09:47,706 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 14:09:47,706 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 14:09:47,707 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 14:09:47,707 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 14:09:47,707 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-08-27 14:09:47,707 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 475cf88887990488194ca7f61a6d05f74a450e7b [2021-08-27 14:09:47,923 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 14:09:47,936 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 14:09:47,938 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 14:09:47,938 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 14:09:47,939 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 14:09:47,939 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-restricted-15/AlternKonv.c [2021-08-27 14:09:47,987 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb720aba5/7944f345436d48f38d625fc707f32735/FLAG928b245dd [2021-08-27 14:09:48,269 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 14:09:48,270 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-restricted-15/AlternKonv.c [2021-08-27 14:09:48,281 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb720aba5/7944f345436d48f38d625fc707f32735/FLAG928b245dd [2021-08-27 14:09:48,707 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb720aba5/7944f345436d48f38d625fc707f32735 [2021-08-27 14:09:48,709 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 14:09:48,710 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-27 14:09:48,710 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 14:09:48,711 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 14:09:48,713 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 14:09:48,713 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 02:09:48" (1/1) ... [2021-08-27 14:09:48,714 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4af6f560 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:09:48, skipping insertion in model container [2021-08-27 14:09:48,714 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 02:09:48" (1/1) ... [2021-08-27 14:09:48,718 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 14:09:48,724 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 14:09:48,797 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 14:09:48,799 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 14:09:48,809 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 14:09:48,815 INFO L208 MainTranslator]: Completed translation [2021-08-27 14:09:48,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:09:48 WrapperNode [2021-08-27 14:09:48,816 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 14:09:48,817 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-27 14:09:48,817 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-27 14:09:48,817 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-27 14:09:48,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:09:48" (1/1) ... [2021-08-27 14:09:48,823 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:09:48" (1/1) ... [2021-08-27 14:09:48,831 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-27 14:09:48,832 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 14:09:48,832 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 14:09:48,832 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 14:09:48,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:09:48" (1/1) ... [2021-08-27 14:09:48,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:09:48" (1/1) ... [2021-08-27 14:09:48,839 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:09:48" (1/1) ... [2021-08-27 14:09:48,839 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:09:48" (1/1) ... [2021-08-27 14:09:48,840 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:09:48" (1/1) ... [2021-08-27 14:09:48,842 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:09:48" (1/1) ... [2021-08-27 14:09:48,842 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:09:48" (1/1) ... [2021-08-27 14:09:48,843 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 14:09:48,843 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 14:09:48,843 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 14:09:48,843 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 14:09:48,844 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:09:48" (1/1) ... [2021-08-27 14:09:48,854 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:09:48,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:09:48,876 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 14:09:48,878 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 14:09:48,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 14:09:48,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 14:09:48,992 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 14:09:48,992 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-08-27 14:09:48,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 02:09:48 BoogieIcfgContainer [2021-08-27 14:09:48,993 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 14:09:48,994 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-08-27 14:09:48,994 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-08-27 14:09:48,996 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-08-27 14:09:48,996 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 14:09:48,996 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 27.08 02:09:48" (1/3) ... [2021-08-27 14:09:48,997 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@fba08d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.08 02:09:48, skipping insertion in model container [2021-08-27 14:09:48,997 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 14:09:48,997 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:09:48" (2/3) ... [2021-08-27 14:09:48,998 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@fba08d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.08 02:09:48, skipping insertion in model container [2021-08-27 14:09:48,998 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 14:09:48,998 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 02:09:48" (3/3) ... [2021-08-27 14:09:48,999 INFO L389 chiAutomizerObserver]: Analyzing ICFG AlternKonv.c [2021-08-27 14:09:49,025 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-08-27 14:09:49,025 INFO L360 BuchiCegarLoop]: Hoare is false [2021-08-27 14:09:49,025 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-08-27 14:09:49,025 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-27 14:09:49,025 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-27 14:09:49,025 INFO L364 BuchiCegarLoop]: Difference is false [2021-08-27 14:09:49,026 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-27 14:09:49,026 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-08-27 14:09:49,034 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 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 14:09:49,043 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-08-27 14:09:49,044 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 14:09:49,044 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 14:09:49,047 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-08-27 14:09:49,047 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-08-27 14:09:49,048 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-08-27 14:09:49,048 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 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 14:09:49,049 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-08-27 14:09:49,049 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 14:09:49,049 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 14:09:49,049 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-08-27 14:09:49,049 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-08-27 14:09:49,053 INFO L791 eck$LassoCheckResult]: Stem: 5#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_~i~0;havoc main_~i~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0; 7#L18-2true [2021-08-27 14:09:49,053 INFO L793 eck$LassoCheckResult]: Loop: 7#L18-2true assume !!(0 != main_~i~0); 8#L10true assume !(main_~i~0 < 0);main_~i~0 := main_~i~0 - 2; 4#L18true assume main_~i~0 > 0;main_~i~0 := -1 * main_~i~0; 7#L18-2true [2021-08-27 14:09:49,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:09:49,057 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2021-08-27 14:09:49,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:09:49,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941825333] [2021-08-27 14:09:49,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:09:49,089 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:09:49,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:09:49,134 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:09:49,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:09:49,155 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:09:49,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:09:49,160 INFO L82 PathProgramCache]: Analyzing trace with hash 40236, now seen corresponding path program 1 times [2021-08-27 14:09:49,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:09:49,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855872373] [2021-08-27 14:09:49,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:09:49,161 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:09:49,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:09:49,174 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:09:49,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:09:49,185 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:09:49,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:09:49,186 INFO L82 PathProgramCache]: Analyzing trace with hash 963757, now seen corresponding path program 1 times [2021-08-27 14:09:49,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:09:49,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349999654] [2021-08-27 14:09:49,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:09:49,187 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:09:49,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:09:49,198 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:09:49,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:09:49,206 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:09:49,311 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 14:09:49,312 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 14:09:49,312 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 14:09:49,312 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 14:09:49,312 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 14:09:49,312 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:09:49,312 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 14:09:49,312 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 14:09:49,312 INFO L133 ssoRankerPreferences]: Filename of dumped script: AlternKonv.c_Iteration1_Loop [2021-08-27 14:09:49,312 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 14:09:49,312 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 14:09:49,329 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 14:09:49,351 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 14:09:49,354 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 14:09:49,396 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 14:09:49,396 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 14:09:49,397 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:09:49,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:09:49,398 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 14:09:49,399 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 14:09:49,400 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 14:09:49,400 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 14:09:49,415 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 14:09:49,416 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_1=1} Honda state: {v_rep~unnamed0~0~true_1=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 14:09:49,432 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Ended with exit code 0 [2021-08-27 14:09:49,433 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:09:49,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:09:49,434 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 14:09:49,435 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 14:09:49,436 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 14:09:49,436 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 14:09:49,450 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 14:09:49,450 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_1=0} Honda state: {v_rep~unnamed0~0~false_1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 14:09:49,467 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 14:09:49,467 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:09:49,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:09:49,468 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 14:09:49,469 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 14:09:49,474 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 14:09:49,474 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 14:09:49,510 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 14:09:49,510 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:09:49,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:09:49,511 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 14:09:49,520 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 14:09:49,521 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 14:09:49,521 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 14:09:49,593 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 14:09:49,599 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 14:09:49,599 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 14:09:49,599 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 14:09:49,599 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 14:09:49,599 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 14:09:49,599 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 14:09:49,599 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:09:49,599 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 14:09:49,599 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 14:09:49,599 INFO L133 ssoRankerPreferences]: Filename of dumped script: AlternKonv.c_Iteration1_Loop [2021-08-27 14:09:49,599 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 14:09:49,600 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 14:09:49,601 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 14:09:49,609 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 14:09:49,611 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 14:09:49,650 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 14:09:49,653 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 14:09:49,654 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:09:49,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:09:49,659 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 14:09:49,693 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 14:09:49,699 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 14:09:49,707 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 14:09:49,707 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 14:09:49,707 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 14:09:49,707 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 14:09:49,710 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 14:09:49,710 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 14:09:49,725 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 14:09:49,742 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 14:09:49,742 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:09:49,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:09:49,743 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 14:09:49,744 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 14:09:49,745 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 14:09:49,751 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 14:09:49,752 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 14:09:49,752 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 14:09:49,752 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 14:09:49,754 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 14:09:49,754 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 14:09:49,772 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 14:09:49,789 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 14:09:49,789 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:09:49,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:09:49,790 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 14:09:49,791 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 14:09:49,792 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 14:09:49,798 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 14:09:49,799 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 14:09:49,799 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 14:09:49,799 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 14:09:49,799 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 14:09:49,800 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 14:09:49,800 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 14:09:49,827 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 14:09:49,835 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-08-27 14:09:49,835 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-08-27 14:09:49,836 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:09:49,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:09:49,841 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 14:09:49,845 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 14:09:49,846 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 14:09:49,846 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 14:09:49,846 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 14:09:49,846 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2021-08-27 14:09:49,865 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 14:09:49,867 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 14:09:49,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:09:49,904 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 14:09:49,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 14:09:49,907 WARN L261 TraceCheckSpWp]: Trace formula consists of 4 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 14:09:49,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 14:09:49,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 14:09:49,915 WARN L261 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-27 14:09:49,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 14:09:49,936 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 14:09:49,945 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 14:09:49,946 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 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 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:09:49,972 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 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 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 31 states and 46 transitions. Complement of second has 6 states. [2021-08-27 14:09:49,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-08-27 14:09:49,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:09:49,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 16 transitions. [2021-08-27 14:09:49,975 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 16 transitions. Stem has 1 letters. Loop has 3 letters. [2021-08-27 14:09:49,976 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 14:09:49,976 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 16 transitions. Stem has 4 letters. Loop has 3 letters. [2021-08-27 14:09:49,976 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 14:09:49,976 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 16 transitions. Stem has 1 letters. Loop has 6 letters. [2021-08-27 14:09:49,976 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 14:09:49,977 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 31 states and 46 transitions. [2021-08-27 14:09:49,979 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-08-27 14:09:49,981 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 31 states to 14 states and 21 transitions. [2021-08-27 14:09:49,981 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2021-08-27 14:09:49,981 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2021-08-27 14:09:49,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 21 transitions. [2021-08-27 14:09:49,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 14:09:49,982 INFO L681 BuchiCegarLoop]: Abstraction has 14 states and 21 transitions. [2021-08-27 14:09:49,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states and 21 transitions. [2021-08-27 14:09:50,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2021-08-27 14:09:50,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 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 14:09:50,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 20 transitions. [2021-08-27 14:09:50,006 INFO L704 BuchiCegarLoop]: Abstraction has 13 states and 20 transitions. [2021-08-27 14:09:50,006 INFO L587 BuchiCegarLoop]: Abstraction has 13 states and 20 transitions. [2021-08-27 14:09:50,006 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-08-27 14:09:50,006 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states and 20 transitions. [2021-08-27 14:09:50,007 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-08-27 14:09:50,007 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 14:09:50,007 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 14:09:50,007 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-08-27 14:09:50,007 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-08-27 14:09:50,007 INFO L791 eck$LassoCheckResult]: Stem: 84#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0;havoc main_~i~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0; 85#L18-2 assume !!(0 != main_~i~0); 87#L10 assume main_~i~0 < 0;main_~i~0 := 2 + main_~i~0; 89#L12 [2021-08-27 14:09:50,008 INFO L793 eck$LassoCheckResult]: Loop: 89#L12 assume !(main_~i~0 < 0); 79#L18-2 assume !!(0 != main_~i~0); 90#L10 assume main_~i~0 < 0;main_~i~0 := 2 + main_~i~0; 89#L12 [2021-08-27 14:09:50,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:09:50,008 INFO L82 PathProgramCache]: Analyzing trace with hash 31075, now seen corresponding path program 1 times [2021-08-27 14:09:50,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:09:50,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764843636] [2021-08-27 14:09:50,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:09:50,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:09:50,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:09:50,012 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:09:50,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:09:50,014 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:09:50,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:09:50,015 INFO L82 PathProgramCache]: Analyzing trace with hash 52217, now seen corresponding path program 1 times [2021-08-27 14:09:50,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:09:50,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078110985] [2021-08-27 14:09:50,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:09:50,015 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:09:50,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 14:09:50,036 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 14:09:50,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 14:09:50,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078110985] [2021-08-27 14:09:50,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078110985] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 14:09:50,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 14:09:50,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-27 14:09:50,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992022539] [2021-08-27 14:09:50,038 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-08-27 14:09:50,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 14:09:50,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-27 14:09:50,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 14:09:50,041 INFO L87 Difference]: Start difference. First operand 13 states and 20 transitions. cyclomatic complexity: 9 Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:09:50,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 14:09:50,059 INFO L93 Difference]: Finished difference Result 15 states and 22 transitions. [2021-08-27 14:09:50,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-27 14:09:50,059 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 15 states and 22 transitions. [2021-08-27 14:09:50,060 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-08-27 14:09:50,060 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 15 states to 15 states and 22 transitions. [2021-08-27 14:09:50,060 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2021-08-27 14:09:50,060 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2021-08-27 14:09:50,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 22 transitions. [2021-08-27 14:09:50,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 14:09:50,061 INFO L681 BuchiCegarLoop]: Abstraction has 15 states and 22 transitions. [2021-08-27 14:09:50,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states and 22 transitions. [2021-08-27 14:09:50,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-08-27 14:09:50,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:09:50,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 22 transitions. [2021-08-27 14:09:50,062 INFO L704 BuchiCegarLoop]: Abstraction has 15 states and 22 transitions. [2021-08-27 14:09:50,062 INFO L587 BuchiCegarLoop]: Abstraction has 15 states and 22 transitions. [2021-08-27 14:09:50,062 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-08-27 14:09:50,062 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 15 states and 22 transitions. [2021-08-27 14:09:50,062 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-08-27 14:09:50,062 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 14:09:50,062 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 14:09:50,063 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-08-27 14:09:50,063 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-08-27 14:09:50,063 INFO L791 eck$LassoCheckResult]: Stem: 118#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0;havoc main_~i~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0; 119#L18-2 assume !!(0 != main_~i~0); 121#L10 assume main_~i~0 < 0;main_~i~0 := 2 + main_~i~0; 123#L12 [2021-08-27 14:09:50,063 INFO L793 eck$LassoCheckResult]: Loop: 123#L12 assume main_~i~0 < 0; 120#L13 assume !(main_~i~0 <= -2147483648);main_~i~0 := -1 * main_~i~0; 113#L18-2 assume !!(0 != main_~i~0); 126#L10 assume main_~i~0 < 0;main_~i~0 := 2 + main_~i~0; 123#L12 [2021-08-27 14:09:50,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:09:50,063 INFO L82 PathProgramCache]: Analyzing trace with hash 31075, now seen corresponding path program 2 times [2021-08-27 14:09:50,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:09:50,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978674021] [2021-08-27 14:09:50,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:09:50,064 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:09:50,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:09:50,066 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:09:50,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:09:50,068 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:09:50,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:09:50,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1420681, now seen corresponding path program 1 times [2021-08-27 14:09:50,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:09:50,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531177388] [2021-08-27 14:09:50,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:09:50,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:09:50,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 14:09:50,109 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 14:09:50,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 14:09:50,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531177388] [2021-08-27 14:09:50,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531177388] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 14:09:50,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 14:09:50,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-27 14:09:50,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168847312] [2021-08-27 14:09:50,112 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-08-27 14:09:50,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 14:09:50,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 14:09:50,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 14:09:50,113 INFO L87 Difference]: Start difference. First operand 15 states and 22 transitions. cyclomatic complexity: 9 Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:09:50,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 14:09:50,130 INFO L93 Difference]: Finished difference Result 21 states and 27 transitions. [2021-08-27 14:09:50,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 14:09:50,130 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 21 states and 27 transitions. [2021-08-27 14:09:50,131 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 11 [2021-08-27 14:09:50,131 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 21 states to 20 states and 26 transitions. [2021-08-27 14:09:50,131 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2021-08-27 14:09:50,131 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2021-08-27 14:09:50,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 26 transitions. [2021-08-27 14:09:50,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 14:09:50,132 INFO L681 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-08-27 14:09:50,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states and 26 transitions. [2021-08-27 14:09:50,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2021-08-27 14:09:50,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 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 14:09:50,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 20 transitions. [2021-08-27 14:09:50,133 INFO L704 BuchiCegarLoop]: Abstraction has 14 states and 20 transitions. [2021-08-27 14:09:50,133 INFO L587 BuchiCegarLoop]: Abstraction has 14 states and 20 transitions. [2021-08-27 14:09:50,133 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-08-27 14:09:50,133 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states and 20 transitions. [2021-08-27 14:09:50,133 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2021-08-27 14:09:50,133 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 14:09:50,133 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 14:09:50,133 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-08-27 14:09:50,133 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1] [2021-08-27 14:09:50,133 INFO L791 eck$LassoCheckResult]: Stem: 160#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0;havoc main_~i~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0; 161#L18-2 assume !!(0 != main_~i~0); 164#L10 [2021-08-27 14:09:50,134 INFO L793 eck$LassoCheckResult]: Loop: 164#L10 assume main_~i~0 < 0;main_~i~0 := 2 + main_~i~0; 166#L12 assume !(main_~i~0 < 0); 163#L18-2 assume !!(0 != main_~i~0); 167#L10 assume !(main_~i~0 < 0);main_~i~0 := main_~i~0 - 2; 155#L18 assume main_~i~0 > 0;main_~i~0 := -1 * main_~i~0; 156#L18-2 assume !!(0 != main_~i~0); 164#L10 [2021-08-27 14:09:50,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:09:50,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2021-08-27 14:09:50,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:09:50,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230446112] [2021-08-27 14:09:50,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:09:50,134 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:09:50,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:09:50,139 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:09:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:09:50,140 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:09:50,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:09:50,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1281247432, now seen corresponding path program 1 times [2021-08-27 14:09:50,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:09:50,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349565302] [2021-08-27 14:09:50,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:09:50,141 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:09:50,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 14:09:50,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 14:09:50,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 14:09:50,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349565302] [2021-08-27 14:09:50,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349565302] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 14:09:50,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 14:09:50,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 14:09:50,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323306990] [2021-08-27 14:09:50,164 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-08-27 14:09:50,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 14:09:50,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 14:09:50,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-27 14:09:50,165 INFO L87 Difference]: Start difference. First operand 14 states and 20 transitions. cyclomatic complexity: 8 Second operand has 4 states, 4 states have (on average 1.5) 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 14:09:50,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 14:09:50,193 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2021-08-27 14:09:50,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 14:09:50,193 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2021-08-27 14:09:50,196 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-08-27 14:09:50,197 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2021-08-27 14:09:50,197 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2021-08-27 14:09:50,198 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 24 [2021-08-27 14:09:50,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2021-08-27 14:09:50,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 14:09:50,199 INFO L681 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-08-27 14:09:50,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2021-08-27 14:09:50,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2021-08-27 14:09:50,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:09:50,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2021-08-27 14:09:50,202 INFO L704 BuchiCegarLoop]: Abstraction has 16 states and 22 transitions. [2021-08-27 14:09:50,202 INFO L587 BuchiCegarLoop]: Abstraction has 16 states and 22 transitions. [2021-08-27 14:09:50,203 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-08-27 14:09:50,203 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states and 22 transitions. [2021-08-27 14:09:50,203 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2021-08-27 14:09:50,203 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 14:09:50,203 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 14:09:50,203 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-08-27 14:09:50,203 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1] [2021-08-27 14:09:50,203 INFO L791 eck$LassoCheckResult]: Stem: 204#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0;havoc main_~i~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0; 205#L18-2 assume !!(0 != main_~i~0); 208#L10 [2021-08-27 14:09:50,203 INFO L793 eck$LassoCheckResult]: Loop: 208#L10 assume main_~i~0 < 0;main_~i~0 := 2 + main_~i~0; 210#L12 assume !(main_~i~0 < 0); 211#L18-2 assume !!(0 != main_~i~0); 209#L10 assume !(main_~i~0 < 0);main_~i~0 := main_~i~0 - 2; 202#L18 assume !(main_~i~0 > 0); 203#L18-2 assume !!(0 != main_~i~0); 208#L10 [2021-08-27 14:09:50,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:09:50,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 2 times [2021-08-27 14:09:50,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:09:50,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821747482] [2021-08-27 14:09:50,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:09:50,206 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:09:50,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:09:50,208 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:09:50,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:09:50,209 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:09:50,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:09:50,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1281247494, now seen corresponding path program 1 times [2021-08-27 14:09:50,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:09:50,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119961320] [2021-08-27 14:09:50,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:09:50,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:09:50,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:09:50,212 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:09:50,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:09:50,214 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:09:50,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:09:50,214 INFO L82 PathProgramCache]: Analyzing trace with hash 614201903, now seen corresponding path program 1 times [2021-08-27 14:09:50,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:09:50,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257086269] [2021-08-27 14:09:50,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:09:50,215 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:09:50,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:09:50,217 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:09:50,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:09:50,223 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:09:50,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 27.08 02:09:50 BoogieIcfgContainer [2021-08-27 14:09:50,282 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-08-27 14:09:50,282 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 14:09:50,282 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 14:09:50,282 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 14:09:50,283 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 02:09:48" (3/4) ... [2021-08-27 14:09:50,285 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2021-08-27 14:09:50,341 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-27 14:09:50,341 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 14:09:50,342 INFO L168 Benchmark]: Toolchain (without parser) took 1631.52 ms. Allocated memory was 54.5 MB in the beginning and 83.9 MB in the end (delta: 29.4 MB). Free memory was 32.6 MB in the beginning and 62.4 MB in the end (delta: -29.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 14:09:50,342 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 54.5 MB. Free memory was 36.4 MB in the beginning and 36.4 MB in the end (delta: 37.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 14:09:50,342 INFO L168 Benchmark]: CACSL2BoogieTranslator took 105.60 ms. Allocated memory is still 54.5 MB. Free memory was 32.5 MB in the beginning and 37.7 MB in the end (delta: -5.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 16.1 GB. [2021-08-27 14:09:50,343 INFO L168 Benchmark]: Boogie Procedure Inliner took 14.93 ms. Allocated memory is still 54.5 MB. Free memory was 37.7 MB in the beginning and 36.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 14:09:50,343 INFO L168 Benchmark]: Boogie Preprocessor took 10.94 ms. Allocated memory was 54.5 MB in the beginning and 69.2 MB in the end (delta: 14.7 MB). Free memory was 36.5 MB in the beginning and 53.8 MB in the end (delta: -17.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 14:09:50,343 INFO L168 Benchmark]: RCFGBuilder took 150.23 ms. Allocated memory is still 69.2 MB. Free memory was 53.8 MB in the beginning and 44.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-08-27 14:09:50,343 INFO L168 Benchmark]: BuchiAutomizer took 1287.70 ms. Allocated memory was 69.2 MB in the beginning and 83.9 MB in the end (delta: 14.7 MB). Free memory was 44.6 MB in the beginning and 63.9 MB in the end (delta: -19.4 MB). Peak memory consumption was 21.6 MB. Max. memory is 16.1 GB. [2021-08-27 14:09:50,344 INFO L168 Benchmark]: Witness Printer took 58.69 ms. Allocated memory is still 83.9 MB. Free memory was 63.9 MB in the beginning and 62.4 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 14:09:50,345 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 54.5 MB. Free memory was 36.4 MB in the beginning and 36.4 MB in the end (delta: 37.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 105.60 ms. Allocated memory is still 54.5 MB. Free memory was 32.5 MB in the beginning and 37.7 MB in the end (delta: -5.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 14.93 ms. Allocated memory is still 54.5 MB. Free memory was 37.7 MB in the beginning and 36.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 10.94 ms. Allocated memory was 54.5 MB in the beginning and 69.2 MB in the end (delta: 14.7 MB). Free memory was 36.5 MB in the beginning and 53.8 MB in the end (delta: -17.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 150.23 ms. Allocated memory is still 69.2 MB. Free memory was 53.8 MB in the beginning and 44.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 1287.70 ms. Allocated memory was 69.2 MB in the beginning and 83.9 MB in the end (delta: 14.7 MB). Free memory was 44.6 MB in the beginning and 63.9 MB in the end (delta: -19.4 MB). Peak memory consumption was 21.6 MB. Max. memory is 16.1 GB. * Witness Printer took 58.69 ms. Allocated memory is still 83.9 MB. Free memory was 63.9 MB in the beginning and 62.4 MB in the end (delta: 1.6 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 4 terminating modules (3 trivial, 1 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function i and consists of 4 locations. 3 modules have a trivial ranking function, the largest among these consists of 4 locations. The remainder module has 16 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 1.2s and 5 iterations. TraceHistogramMax:2. Analysis of lassos took 1.0s. Construction of modules took 0.0s. Büchi inclusion checks took 0.1s. Highest rank in rank-based complementation 3. Minimization of det autom 0. Minimization of nondet autom 4. Automata minimization 22.0ms AutomataMinimizationTime, 4 MinimizatonAttempts, 15 StatesRemovedByMinimization, 3 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 16 states and ocurred in iteration 4. Nontrivial modules had stage [1, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 27 SDtfs, 9 SDslu, 6 SDs, 0 SdLazy, 73 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 46.2ms Time LassoAnalysisResults: nont1 unkn0 SFLI3 SFLT1 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital12 mio100 ax200 hnf91 lsp45 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq160 hnf93 smp100 dnf100 smp100 tf113 neg100 sie111 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 71ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 2 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 1 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.1s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 10]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {} State at position 1 is {org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@309f318e=0, \result=0, i=-1} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 10]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L6] int i; [L7] i = __VERIFIER_nondet_int() [L9] COND TRUE i != 0 Loop: [L10] COND TRUE i < 0 [L11] i = i+2 [L12] COND FALSE !(i < 0) [L9] COND TRUE i != 0 [L10] COND FALSE !(i < 0) [L17] i = i-2 [L18] COND FALSE !(i > 0) [L9] COND TRUE i != 0 End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2021-08-27 14:09:50,375 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...