./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr.8_overflow.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 3a877d22 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/seq-mthreaded/pals_lcr.8_overflow.ufo.UNBOUNDED.pals.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 55ec916898aa0c4eb40269e81429fc0273ca07ec4caf7be0cd441cce0028ad79 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 17:23:11,592 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 17:23:11,599 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 17:23:11,638 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 17:23:11,639 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 17:23:11,640 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 17:23:11,641 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 17:23:11,642 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 17:23:11,643 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 17:23:11,644 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 17:23:11,645 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 17:23:11,646 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 17:23:11,646 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 17:23:11,647 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 17:23:11,648 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 17:23:11,649 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 17:23:11,650 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 17:23:11,650 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 17:23:11,652 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 17:23:11,653 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 17:23:11,655 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 17:23:11,656 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 17:23:11,657 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 17:23:11,657 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 17:23:11,660 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 17:23:11,660 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 17:23:11,661 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 17:23:11,661 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 17:23:11,662 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 17:23:11,663 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 17:23:11,663 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 17:23:11,664 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 17:23:11,665 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 17:23:11,665 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 17:23:11,666 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 17:23:11,666 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 17:23:11,667 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 17:23:11,667 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 17:23:11,668 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 17:23:11,668 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 17:23:11,669 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 17:23:11,670 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-12-15 17:23:11,687 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 17:23:11,687 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 17:23:11,688 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 17:23:11,688 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 17:23:11,689 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 17:23:11,689 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 17:23:11,689 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 17:23:11,689 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-12-15 17:23:11,690 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-12-15 17:23:11,690 INFO L138 SettingsManager]: * Use old map elimination=false [2021-12-15 17:23:11,690 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-12-15 17:23:11,690 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-12-15 17:23:11,690 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-12-15 17:23:11,690 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 17:23:11,691 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 17:23:11,691 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-15 17:23:11,691 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 17:23:11,691 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 17:23:11,691 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 17:23:11,692 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-12-15 17:23:11,692 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-12-15 17:23:11,692 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-12-15 17:23:11,692 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 17:23:11,692 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 17:23:11,693 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-12-15 17:23:11,693 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 17:23:11,693 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-12-15 17:23:11,693 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 17:23:11,693 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 17:23:11,694 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 17:23:11,694 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 17:23:11,694 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 17:23:11,695 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-12-15 17:23:11,695 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 55ec916898aa0c4eb40269e81429fc0273ca07ec4caf7be0cd441cce0028ad79 [2021-12-15 17:23:11,885 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 17:23:11,906 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 17:23:11,908 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 17:23:11,909 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 17:23:11,910 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 17:23:11,911 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.8_overflow.ufo.UNBOUNDED.pals.c [2021-12-15 17:23:11,988 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60acf6096/855623b2dbe34ec5bbc6b45b0d52ae0c/FLAG3a682fb11 [2021-12-15 17:23:12,432 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 17:23:12,436 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.8_overflow.ufo.UNBOUNDED.pals.c [2021-12-15 17:23:12,453 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60acf6096/855623b2dbe34ec5bbc6b45b0d52ae0c/FLAG3a682fb11 [2021-12-15 17:23:12,960 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60acf6096/855623b2dbe34ec5bbc6b45b0d52ae0c [2021-12-15 17:23:12,961 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 17:23:12,962 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 17:23:12,966 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 17:23:12,967 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 17:23:12,971 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 17:23:12,972 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 05:23:12" (1/1) ... [2021-12-15 17:23:12,972 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5286fd3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:23:12, skipping insertion in model container [2021-12-15 17:23:12,972 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 05:23:12" (1/1) ... [2021-12-15 17:23:12,977 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 17:23:13,013 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 17:23:13,207 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.8_overflow.ufo.UNBOUNDED.pals.c[26555,26568] [2021-12-15 17:23:13,208 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 17:23:13,217 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 17:23:13,279 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.8_overflow.ufo.UNBOUNDED.pals.c[26555,26568] [2021-12-15 17:23:13,280 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 17:23:13,306 INFO L208 MainTranslator]: Completed translation [2021-12-15 17:23:13,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:23:13 WrapperNode [2021-12-15 17:23:13,307 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 17:23:13,308 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 17:23:13,308 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 17:23:13,309 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 17:23:13,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:23:13" (1/1) ... [2021-12-15 17:23:13,338 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:23:13" (1/1) ... [2021-12-15 17:23:13,376 INFO L137 Inliner]: procedures = 28, calls = 19, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 494 [2021-12-15 17:23:13,376 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 17:23:13,377 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 17:23:13,377 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 17:23:13,377 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 17:23:13,385 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:23:13" (1/1) ... [2021-12-15 17:23:13,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:23:13" (1/1) ... [2021-12-15 17:23:13,388 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:23:13" (1/1) ... [2021-12-15 17:23:13,388 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:23:13" (1/1) ... [2021-12-15 17:23:13,398 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:23:13" (1/1) ... [2021-12-15 17:23:13,421 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:23:13" (1/1) ... [2021-12-15 17:23:13,423 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:23:13" (1/1) ... [2021-12-15 17:23:13,427 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 17:23:13,429 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 17:23:13,429 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 17:23:13,429 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 17:23:13,430 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:23:13" (1/1) ... [2021-12-15 17:23:13,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-15 17:23:13,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 17:23:13,458 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) [2021-12-15 17:23:13,471 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 [2021-12-15 17:23:13,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 17:23:13,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 17:23:13,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 17:23:13,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 17:23:13,622 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 17:23:13,624 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 17:23:14,024 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 17:23:14,043 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 17:23:14,045 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 17:23:14,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 05:23:14 BoogieIcfgContainer [2021-12-15 17:23:14,047 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 17:23:14,049 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-12-15 17:23:14,049 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-12-15 17:23:14,052 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-12-15 17:23:14,052 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-15 17:23:14,053 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 15.12 05:23:12" (1/3) ... [2021-12-15 17:23:14,054 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2cb6efe8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 15.12 05:23:14, skipping insertion in model container [2021-12-15 17:23:14,054 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-15 17:23:14,054 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:23:13" (2/3) ... [2021-12-15 17:23:14,054 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2cb6efe8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 15.12 05:23:14, skipping insertion in model container [2021-12-15 17:23:14,055 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-15 17:23:14,055 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 05:23:14" (3/3) ... [2021-12-15 17:23:14,056 INFO L388 chiAutomizerObserver]: Analyzing ICFG pals_lcr.8_overflow.ufo.UNBOUNDED.pals.c [2021-12-15 17:23:14,094 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-12-15 17:23:14,094 INFO L360 BuchiCegarLoop]: Hoare is false [2021-12-15 17:23:14,094 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-12-15 17:23:14,094 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-12-15 17:23:14,094 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-12-15 17:23:14,094 INFO L364 BuchiCegarLoop]: Difference is false [2021-12-15 17:23:14,094 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-12-15 17:23:14,094 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-12-15 17:23:14,108 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 146 states, 145 states have (on average 1.7586206896551724) internal successors, (255), 145 states have internal predecessors, (255), 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) [2021-12-15 17:23:14,130 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 75 [2021-12-15 17:23:14,131 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-15 17:23:14,131 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-15 17:23:14,138 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-15 17:23:14,139 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 17:23:14,139 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-12-15 17:23:14,140 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 146 states, 145 states have (on average 1.7586206896551724) internal successors, (255), 145 states have internal predecessors, (255), 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) [2021-12-15 17:23:14,147 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 75 [2021-12-15 17:23:14,147 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-15 17:23:14,147 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-15 17:23:14,148 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-15 17:23:14,148 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 17:23:14,155 INFO L791 eck$LassoCheckResult]: Stem: 134#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(41, 2);call #Ultimate.allocInit(12, 3);~nomsg~0 := -1;~r1~0 := 0;~p1~0 := 0;~p1_old~0 := 0;~p1_new~0 := 0;~id1~0 := 0;~st1~0 := 0;~send1~0 := 0;~mode1~0 := 0;~p2~0 := 0;~p2_old~0 := 0;~p2_new~0 := 0;~id2~0 := 0;~st2~0 := 0;~send2~0 := 0;~mode2~0 := 0;~p3~0 := 0;~p3_old~0 := 0;~p3_new~0 := 0;~id3~0 := 0;~st3~0 := 0;~send3~0 := 0;~mode3~0 := 0;~p4~0 := 0;~p4_old~0 := 0;~p4_new~0 := 0;~id4~0 := 0;~st4~0 := 0;~send4~0 := 0;~mode4~0 := 0;~p5~0 := 0;~p5_old~0 := 0;~p5_new~0 := 0;~id5~0 := 0;~st5~0 := 0;~send5~0 := 0;~mode5~0 := 0;~p6~0 := 0;~p6_old~0 := 0;~p6_new~0 := 0;~id6~0 := 0;~st6~0 := 0;~send6~0 := 0;~mode6~0 := 0;~p7~0 := 0;~p7_old~0 := 0;~p7_new~0 := 0;~id7~0 := 0;~st7~0 := 0;~send7~0 := 0;~mode7~0 := 0;~p8~0 := 0;~p8_old~0 := 0;~p8_new~0 := 0;~id8~0 := 0;~st8~0 := 0;~send8~0 := 0;~mode8~0 := 0;~nodes~0.base, ~nodes~0.offset := ~nodes~0.base[0 := #funAddr~node1.base], ~nodes~0.offset[0 := #funAddr~node1.offset];~nodes~0.base, ~nodes~0.offset := ~nodes~0.base[1 := #funAddr~node2.base], ~nodes~0.offset[1 := #funAddr~node2.offset];~nodes~0.base, ~nodes~0.offset := ~nodes~0.base[2 := #funAddr~node3.base], ~nodes~0.offset[2 := #funAddr~node3.offset];~nodes~0.base, ~nodes~0.offset := ~nodes~0.base[3 := #funAddr~node4.base], ~nodes~0.offset[3 := #funAddr~node4.offset];~nodes~0.base, ~nodes~0.offset := ~nodes~0.base[4 := #funAddr~node5.base], ~nodes~0.offset[4 := #funAddr~node5.offset];~nodes~0.base, ~nodes~0.offset := ~nodes~0.base[5 := #funAddr~node6.base], ~nodes~0.offset[5 := #funAddr~node6.offset];~nodes~0.base, ~nodes~0.offset := ~nodes~0.base[6 := #funAddr~node7.base], ~nodes~0.offset[6 := #funAddr~node7.offset];~nodes~0.base, ~nodes~0.offset := ~nodes~0.base[7 := #funAddr~node8.base], ~nodes~0.offset[7 := #funAddr~node8.offset]; 46#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet12#1, main_#t~nondet13#1, main_#t~nondet14#1, main_#t~nondet15#1, main_#t~nondet16#1, main_#t~nondet17#1, main_#t~nondet18#1, main_#t~nondet19#1, main_#t~nondet20#1, main_#t~nondet21#1, main_#t~nondet22#1, main_#t~nondet23#1, main_#t~nondet24#1, main_#t~nondet25#1, main_#t~nondet26#1, main_#t~nondet27#1, main_#t~nondet28#1, main_#t~nondet29#1, main_#t~nondet30#1, main_#t~nondet31#1, main_#t~nondet32#1, main_#t~nondet33#1, main_#t~nondet34#1, main_#t~nondet35#1, main_#t~nondet36#1, main_#t~nondet37#1, main_#t~nondet38#1, main_#t~nondet39#1, main_#t~nondet40#1, main_#t~nondet41#1, main_#t~nondet42#1, main_#t~nondet43#1, main_#t~nondet44#1, main_#t~ret45#1, main_#t~ret46#1, main_~c1~0#1, main_~i2~0#1;havoc main_~c1~0#1;havoc main_~i2~0#1;main_~c1~0#1 := 0;~r1~0 := main_#t~nondet12#1;havoc main_#t~nondet12#1;~id1~0 := main_#t~nondet13#1;havoc main_#t~nondet13#1;~st1~0 := main_#t~nondet14#1;havoc main_#t~nondet14#1;~send1~0 := main_#t~nondet15#1;havoc main_#t~nondet15#1;~mode1~0 := main_#t~nondet16#1;havoc main_#t~nondet16#1;~id2~0 := main_#t~nondet17#1;havoc main_#t~nondet17#1;~st2~0 := main_#t~nondet18#1;havoc main_#t~nondet18#1;~send2~0 := main_#t~nondet19#1;havoc main_#t~nondet19#1;~mode2~0 := main_#t~nondet20#1;havoc main_#t~nondet20#1;~id3~0 := main_#t~nondet21#1;havoc main_#t~nondet21#1;~st3~0 := main_#t~nondet22#1;havoc main_#t~nondet22#1;~send3~0 := main_#t~nondet23#1;havoc main_#t~nondet23#1;~mode3~0 := main_#t~nondet24#1;havoc main_#t~nondet24#1;~id4~0 := main_#t~nondet25#1;havoc main_#t~nondet25#1;~st4~0 := main_#t~nondet26#1;havoc main_#t~nondet26#1;~send4~0 := main_#t~nondet27#1;havoc main_#t~nondet27#1;~mode4~0 := main_#t~nondet28#1;havoc main_#t~nondet28#1;~id5~0 := main_#t~nondet29#1;havoc main_#t~nondet29#1;~st5~0 := main_#t~nondet30#1;havoc main_#t~nondet30#1;~send5~0 := main_#t~nondet31#1;havoc main_#t~nondet31#1;~mode5~0 := main_#t~nondet32#1;havoc main_#t~nondet32#1;~id6~0 := main_#t~nondet33#1;havoc main_#t~nondet33#1;~st6~0 := main_#t~nondet34#1;havoc main_#t~nondet34#1;~send6~0 := main_#t~nondet35#1;havoc main_#t~nondet35#1;~mode6~0 := main_#t~nondet36#1;havoc main_#t~nondet36#1;~id7~0 := main_#t~nondet37#1;havoc main_#t~nondet37#1;~st7~0 := main_#t~nondet38#1;havoc main_#t~nondet38#1;~send7~0 := main_#t~nondet39#1;havoc main_#t~nondet39#1;~mode7~0 := main_#t~nondet40#1;havoc main_#t~nondet40#1;~id8~0 := main_#t~nondet41#1;havoc main_#t~nondet41#1;~st8~0 := main_#t~nondet42#1;havoc main_#t~nondet42#1;~send8~0 := main_#t~nondet43#1;havoc main_#t~nondet43#1;~mode8~0 := main_#t~nondet44#1;havoc main_#t~nondet44#1;assume { :begin_inline_init } true;havoc init_#res#1;havoc init_~tmp~0#1;havoc init_~tmp~0#1; 37#L297true assume !(0 == ~r1~0 % 256);init_~tmp~0#1 := 0; 36#L297-1true init_#res#1 := init_~tmp~0#1; 8#L542true main_#t~ret45#1 := init_#res#1;assume { :end_inline_init } true;main_~i2~0#1 := main_#t~ret45#1;havoc main_#t~ret45#1;assume { :begin_inline_assume_abort_if_not } true;assume_abort_if_not_#in~cond#1 := main_~i2~0#1;havoc assume_abort_if_not_~cond#1;assume_abort_if_not_~cond#1 := assume_abort_if_not_#in~cond#1; 53#L24true assume !(0 == assume_abort_if_not_~cond#1); 13#L23true assume { :end_inline_assume_abort_if_not } true;~p1_old~0 := ~nomsg~0;~p1_new~0 := ~nomsg~0;~p2_old~0 := ~nomsg~0;~p2_new~0 := ~nomsg~0;~p3_old~0 := ~nomsg~0;~p3_new~0 := ~nomsg~0;~p4_old~0 := ~nomsg~0;~p4_new~0 := ~nomsg~0;~p5_old~0 := ~nomsg~0;~p5_new~0 := ~nomsg~0;~p6_old~0 := ~nomsg~0;~p6_new~0 := ~nomsg~0;~p7_old~0 := ~nomsg~0;~p7_new~0 := ~nomsg~0;~p8_old~0 := ~nomsg~0;~p8_new~0 := ~nomsg~0;main_~i2~0#1 := 0; 132#L632-2true [2021-12-15 17:23:14,156 INFO L793 eck$LassoCheckResult]: Loop: 132#L632-2true assume !false;assume { :begin_inline_node1 } true;havoc node1_#t~ite4#1, node1_~m1~0#1;havoc node1_~m1~0#1;node1_~m1~0#1 := ~nomsg~0; 133#L94true assume 0 != ~mode1~0 % 256;~r1~0 := 1 + ~r1~0 % 256;node1_~m1~0#1 := ~p8_old~0;~p8_old~0 := ~nomsg~0; 114#L98true assume !(node1_~m1~0#1 != ~nomsg~0); 17#L98-1true ~mode1~0 := 0; 119#L94-2true assume { :end_inline_node1 } true;assume { :begin_inline_node2 } true;havoc node2_#t~ite5#1, node2_~m2~0#1;havoc node2_~m2~0#1;node2_~m2~0#1 := ~nomsg~0; 51#L120true assume 0 != ~mode2~0 % 256;node2_~m2~0#1 := ~p1_old~0;~p1_old~0 := ~nomsg~0; 21#L123true assume !(node2_~m2~0#1 != ~nomsg~0); 38#L123-1true ~mode2~0 := 0; 31#L120-2true assume { :end_inline_node2 } true;assume { :begin_inline_node3 } true;havoc node3_#t~ite6#1, node3_~m3~0#1;havoc node3_~m3~0#1;node3_~m3~0#1 := ~nomsg~0; 67#L145true assume !(0 != ~mode3~0 % 256); 15#L158true assume !(~send3~0 != ~nomsg~0 && ~p3_new~0 == ~nomsg~0);node3_#t~ite6#1 := ~p3_new~0; 12#L158-2true ~p3_new~0 := (if node3_#t~ite6#1 % 256 <= 127 then node3_#t~ite6#1 % 256 else node3_#t~ite6#1 % 256 - 256);havoc node3_#t~ite6#1;~mode3~0 := 1; 62#L145-2true assume { :end_inline_node3 } true;assume { :begin_inline_node4 } true;havoc node4_#t~ite7#1, node4_~m4~0#1;havoc node4_~m4~0#1;node4_~m4~0#1 := ~nomsg~0; 80#L170true assume !(0 != ~mode4~0 % 256); 28#L183true assume ~send4~0 != ~nomsg~0 && ~p4_new~0 == ~nomsg~0;node4_#t~ite7#1 := ~send4~0; 44#L183-2true ~p4_new~0 := (if node4_#t~ite7#1 % 256 <= 127 then node4_#t~ite7#1 % 256 else node4_#t~ite7#1 % 256 - 256);havoc node4_#t~ite7#1;~mode4~0 := 1; 56#L170-2true assume { :end_inline_node4 } true;assume { :begin_inline_node5 } true;havoc node5_#t~ite8#1, node5_~m5~0#1;havoc node5_~m5~0#1;node5_~m5~0#1 := ~nomsg~0; 120#L195true assume 0 != ~mode5~0 % 256;node5_~m5~0#1 := ~p4_old~0;~p4_old~0 := ~nomsg~0; 83#L198true assume !(node5_~m5~0#1 != ~nomsg~0); 105#L198-1true ~mode5~0 := 0; 86#L195-2true assume { :end_inline_node5 } true;assume { :begin_inline_node6 } true;havoc node6_#t~ite9#1, node6_~m6~0#1;havoc node6_~m6~0#1;node6_~m6~0#1 := ~nomsg~0; 73#L220true assume !(0 != ~mode6~0 % 256); 74#L233true assume ~send6~0 != ~nomsg~0 && ~p6_new~0 == ~nomsg~0;node6_#t~ite9#1 := ~send6~0; 69#L233-2true ~p6_new~0 := (if node6_#t~ite9#1 % 256 <= 127 then node6_#t~ite9#1 % 256 else node6_#t~ite9#1 % 256 - 256);havoc node6_#t~ite9#1;~mode6~0 := 1; 57#L220-2true assume { :end_inline_node6 } true;assume { :begin_inline_node7 } true;havoc node7_#t~ite10#1, node7_~m7~0#1;havoc node7_~m7~0#1;node7_~m7~0#1 := ~nomsg~0; 27#L245true assume 0 != ~mode7~0 % 256;node7_~m7~0#1 := ~p6_old~0;~p6_old~0 := ~nomsg~0; 145#L248true assume !(node7_~m7~0#1 != ~nomsg~0); 90#L248-1true ~mode7~0 := 0; 87#L245-2true assume { :end_inline_node7 } true;assume { :begin_inline_node8 } true;havoc node8_#t~ite11#1, node8_~m8~0#1;havoc node8_~m8~0#1;node8_~m8~0#1 := ~nomsg~0; 9#L270true assume !(0 != ~mode8~0 % 256); 111#L283true assume ~send8~0 != ~nomsg~0 && ~p8_new~0 == ~nomsg~0;node8_#t~ite11#1 := ~send8~0; 14#L283-2true ~p8_new~0 := (if node8_#t~ite11#1 % 256 <= 127 then node8_#t~ite11#1 % 256 else node8_#t~ite11#1 % 256 - 256);havoc node8_#t~ite11#1;~mode8~0 := 1; 75#L270-2true assume { :end_inline_node8 } true;~p1_old~0 := ~p1_new~0;~p1_new~0 := ~nomsg~0;~p2_old~0 := ~p2_new~0;~p2_new~0 := ~nomsg~0;~p3_old~0 := ~p3_new~0;~p3_new~0 := ~nomsg~0;~p4_old~0 := ~p4_new~0;~p4_new~0 := ~nomsg~0;~p5_old~0 := ~p5_new~0;~p5_new~0 := ~nomsg~0;~p6_old~0 := ~p6_new~0;~p6_new~0 := ~nomsg~0;~p7_old~0 := ~p7_new~0;~p7_new~0 := ~nomsg~0;~p8_old~0 := ~p8_new~0;~p8_new~0 := ~nomsg~0;assume { :begin_inline_check } true;havoc check_#res#1;havoc check_~tmp~1#1;havoc check_~tmp~1#1; 146#L550true assume !(~st1~0 + ~st2~0 + ~st3~0 + ~st4~0 + ~st5~0 + ~st6~0 + ~st7~0 + ~st8~0 <= 1);check_~tmp~1#1 := 0; 52#L550-1true check_#res#1 := check_~tmp~1#1; 45#L570true main_#t~ret46#1 := check_#res#1;assume { :end_inline_check } true;main_~c1~0#1 := main_#t~ret46#1;havoc main_#t~ret46#1;assume { :begin_inline_assert } true;assert_#in~arg#1 := (if 0 == main_~c1~0#1 then 0 else 1);havoc assert_~arg#1;assert_~arg#1 := assert_#in~arg#1; 54#L670true assume !(0 == assert_~arg#1 % 256); 104#L665true assume { :end_inline_assert } true; 132#L632-2true [2021-12-15 17:23:14,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 17:23:14,161 INFO L85 PathProgramCache]: Analyzing trace with hash -2144605008, now seen corresponding path program 1 times [2021-12-15 17:23:14,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 17:23:14,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862109986] [2021-12-15 17:23:14,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 17:23:14,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 17:23:14,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 17:23:14,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 17:23:14,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 17:23:14,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862109986] [2021-12-15 17:23:14,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862109986] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 17:23:14,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 17:23:14,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 17:23:14,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318026683] [2021-12-15 17:23:14,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 17:23:14,392 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-15 17:23:14,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 17:23:14,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1401409375, now seen corresponding path program 1 times [2021-12-15 17:23:14,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 17:23:14,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951515637] [2021-12-15 17:23:14,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 17:23:14,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 17:23:14,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 17:23:14,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 17:23:14,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 17:23:14,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951515637] [2021-12-15 17:23:14,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951515637] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 17:23:14,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 17:23:14,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 17:23:14,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285527112] [2021-12-15 17:23:14,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 17:23:14,562 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-15 17:23:14,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 17:23:14,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 17:23:14,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 17:23:14,596 INFO L87 Difference]: Start difference. First operand has 146 states, 145 states have (on average 1.7586206896551724) internal successors, (255), 145 states have internal predecessors, (255), 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 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 17:23:14,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 17:23:14,736 INFO L93 Difference]: Finished difference Result 145 states and 250 transitions. [2021-12-15 17:23:14,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 17:23:14,743 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 145 states and 250 transitions. [2021-12-15 17:23:14,751 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 74 [2021-12-15 17:23:14,755 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 145 states to 141 states and 186 transitions. [2021-12-15 17:23:14,756 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 141 [2021-12-15 17:23:14,757 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 141 [2021-12-15 17:23:14,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 141 states and 186 transitions. [2021-12-15 17:23:14,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-15 17:23:14,758 INFO L681 BuchiCegarLoop]: Abstraction has 141 states and 186 transitions. [2021-12-15 17:23:14,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states and 186 transitions. [2021-12-15 17:23:14,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-12-15 17:23:14,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 141 states have (on average 1.3191489361702127) internal successors, (186), 140 states have internal predecessors, (186), 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) [2021-12-15 17:23:14,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 186 transitions. [2021-12-15 17:23:14,804 INFO L704 BuchiCegarLoop]: Abstraction has 141 states and 186 transitions. [2021-12-15 17:23:14,804 INFO L587 BuchiCegarLoop]: Abstraction has 141 states and 186 transitions. [2021-12-15 17:23:14,804 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-12-15 17:23:14,804 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 141 states and 186 transitions. [2021-12-15 17:23:14,808 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 74 [2021-12-15 17:23:14,809 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-15 17:23:14,809 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-15 17:23:14,811 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 17:23:14,812 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 17:23:14,812 INFO L791 eck$LassoCheckResult]: Stem: 448#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(41, 2);call #Ultimate.allocInit(12, 3);~nomsg~0 := -1;~r1~0 := 0;~p1~0 := 0;~p1_old~0 := 0;~p1_new~0 := 0;~id1~0 := 0;~st1~0 := 0;~send1~0 := 0;~mode1~0 := 0;~p2~0 := 0;~p2_old~0 := 0;~p2_new~0 := 0;~id2~0 := 0;~st2~0 := 0;~send2~0 := 0;~mode2~0 := 0;~p3~0 := 0;~p3_old~0 := 0;~p3_new~0 := 0;~id3~0 := 0;~st3~0 := 0;~send3~0 := 0;~mode3~0 := 0;~p4~0 := 0;~p4_old~0 := 0;~p4_new~0 := 0;~id4~0 := 0;~st4~0 := 0;~send4~0 := 0;~mode4~0 := 0;~p5~0 := 0;~p5_old~0 := 0;~p5_new~0 := 0;~id5~0 := 0;~st5~0 := 0;~send5~0 := 0;~mode5~0 := 0;~p6~0 := 0;~p6_old~0 := 0;~p6_new~0 := 0;~id6~0 := 0;~st6~0 := 0;~send6~0 := 0;~mode6~0 := 0;~p7~0 := 0;~p7_old~0 := 0;~p7_new~0 := 0;~id7~0 := 0;~st7~0 := 0;~send7~0 := 0;~mode7~0 := 0;~p8~0 := 0;~p8_old~0 := 0;~p8_new~0 := 0;~id8~0 := 0;~st8~0 := 0;~send8~0 := 0;~mode8~0 := 0;~nodes~0.base, ~nodes~0.offset := ~nodes~0.base[0 := #funAddr~node1.base], ~nodes~0.offset[0 := #funAddr~node1.offset];~nodes~0.base, ~nodes~0.offset := ~nodes~0.base[1 := #funAddr~node2.base], ~nodes~0.offset[1 := #funAddr~node2.offset];~nodes~0.base, ~nodes~0.offset := ~nodes~0.base[2 := #funAddr~node3.base], ~nodes~0.offset[2 := #funAddr~node3.offset];~nodes~0.base, ~nodes~0.offset := ~nodes~0.base[3 := #funAddr~node4.base], ~nodes~0.offset[3 := #funAddr~node4.offset];~nodes~0.base, ~nodes~0.offset := ~nodes~0.base[4 := #funAddr~node5.base], ~nodes~0.offset[4 := #funAddr~node5.offset];~nodes~0.base, ~nodes~0.offset := ~nodes~0.base[5 := #funAddr~node6.base], ~nodes~0.offset[5 := #funAddr~node6.offset];~nodes~0.base, ~nodes~0.offset := ~nodes~0.base[6 := #funAddr~node7.base], ~nodes~0.offset[6 := #funAddr~node7.offset];~nodes~0.base, ~nodes~0.offset := ~nodes~0.base[7 := #funAddr~node8.base], ~nodes~0.offset[7 := #funAddr~node8.offset]; 383#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet12#1, main_#t~nondet13#1, main_#t~nondet14#1, main_#t~nondet15#1, main_#t~nondet16#1, main_#t~nondet17#1, main_#t~nondet18#1, main_#t~nondet19#1, main_#t~nondet20#1, main_#t~nondet21#1, main_#t~nondet22#1, main_#t~nondet23#1, main_#t~nondet24#1, main_#t~nondet25#1, main_#t~nondet26#1, main_#t~nondet27#1, main_#t~nondet28#1, main_#t~nondet29#1, main_#t~nondet30#1, main_#t~nondet31#1, main_#t~nondet32#1, main_#t~nondet33#1, main_#t~nondet34#1, main_#t~nondet35#1, main_#t~nondet36#1, main_#t~nondet37#1, main_#t~nondet38#1, main_#t~nondet39#1, main_#t~nondet40#1, main_#t~nondet41#1, main_#t~nondet42#1, main_#t~nondet43#1, main_#t~nondet44#1, main_#t~ret45#1, main_#t~ret46#1, main_~c1~0#1, main_~i2~0#1;havoc main_~c1~0#1;havoc main_~i2~0#1;main_~c1~0#1 := 0;~r1~0 := main_#t~nondet12#1;havoc main_#t~nondet12#1;~id1~0 := main_#t~nondet13#1;havoc main_#t~nondet13#1;~st1~0 := main_#t~nondet14#1;havoc main_#t~nondet14#1;~send1~0 := main_#t~nondet15#1;havoc main_#t~nondet15#1;~mode1~0 := main_#t~nondet16#1;havoc main_#t~nondet16#1;~id2~0 := main_#t~nondet17#1;havoc main_#t~nondet17#1;~st2~0 := main_#t~nondet18#1;havoc main_#t~nondet18#1;~send2~0 := main_#t~nondet19#1;havoc main_#t~nondet19#1;~mode2~0 := main_#t~nondet20#1;havoc main_#t~nondet20#1;~id3~0 := main_#t~nondet21#1;havoc main_#t~nondet21#1;~st3~0 := main_#t~nondet22#1;havoc main_#t~nondet22#1;~send3~0 := main_#t~nondet23#1;havoc main_#t~nondet23#1;~mode3~0 := main_#t~nondet24#1;havoc main_#t~nondet24#1;~id4~0 := main_#t~nondet25#1;havoc main_#t~nondet25#1;~st4~0 := main_#t~nondet26#1;havoc main_#t~nondet26#1;~send4~0 := main_#t~nondet27#1;havoc main_#t~nondet27#1;~mode4~0 := main_#t~nondet28#1;havoc main_#t~nondet28#1;~id5~0 := main_#t~nondet29#1;havoc main_#t~nondet29#1;~st5~0 := main_#t~nondet30#1;havoc main_#t~nondet30#1;~send5~0 := main_#t~nondet31#1;havoc main_#t~nondet31#1;~mode5~0 := main_#t~nondet32#1;havoc main_#t~nondet32#1;~id6~0 := main_#t~nondet33#1;havoc main_#t~nondet33#1;~st6~0 := main_#t~nondet34#1;havoc main_#t~nondet34#1;~send6~0 := main_#t~nondet35#1;havoc main_#t~nondet35#1;~mode6~0 := main_#t~nondet36#1;havoc main_#t~nondet36#1;~id7~0 := main_#t~nondet37#1;havoc main_#t~nondet37#1;~st7~0 := main_#t~nondet38#1;havoc main_#t~nondet38#1;~send7~0 := main_#t~nondet39#1;havoc main_#t~nondet39#1;~mode7~0 := main_#t~nondet40#1;havoc main_#t~nondet40#1;~id8~0 := main_#t~nondet41#1;havoc main_#t~nondet41#1;~st8~0 := main_#t~nondet42#1;havoc main_#t~nondet42#1;~send8~0 := main_#t~nondet43#1;havoc main_#t~nondet43#1;~mode8~0 := main_#t~nondet44#1;havoc main_#t~nondet44#1;assume { :begin_inline_init } true;havoc init_#res#1;havoc init_~tmp~0#1;havoc init_~tmp~0#1; 371#L297 assume 0 == ~r1~0 % 256; 360#L298 assume ~id1~0 >= 0; 361#L299 assume 0 == ~st1~0; 380#L300 assume ~send1~0 == ~id1~0; 421#L301 assume 0 == ~mode1~0 % 256; 433#L302 assume ~id2~0 >= 0; 434#L303 assume 0 == ~st2~0; 440#L304 assume ~send2~0 == ~id2~0; 412#L305 assume 0 == ~mode2~0 % 256; 413#L306 assume ~id3~0 >= 0; 429#L307 assume 0 == ~st3~0; 325#L308 assume ~send3~0 == ~id3~0; 326#L309 assume 0 == ~mode3~0 % 256; 425#L310 assume ~id4~0 >= 0; 395#L311 assume 0 == ~st4~0; 396#L312 assume ~send4~0 == ~id4~0; 346#L313 assume 0 == ~mode4~0 % 256; 347#L314 assume ~id5~0 >= 0; 386#L315 assume 0 == ~st5~0; 387#L316 assume ~send5~0 == ~id5~0; 313#L317 assume 0 == ~mode5~0 % 256; 314#L318 assume ~id6~0 >= 0; 449#L319 assume 0 == ~st6~0; 432#L320 assume ~send6~0 == ~id6~0; 418#L321 assume 0 == ~mode6~0 % 256; 419#L322 assume ~id7~0 >= 0; 309#L323 assume 0 == ~st7~0; 310#L324 assume ~send7~0 == ~id7~0; 334#L325 assume 0 == ~mode7~0 % 256; 354#L326 assume ~id8~0 >= 0; 337#L327 assume 0 == ~st8~0; 338#L328 assume ~send8~0 == ~id8~0; 373#L329 assume 0 == ~mode8~0 % 256; 374#L330 assume ~id1~0 != ~id2~0; 323#L331 assume ~id1~0 != ~id3~0; 324#L332 assume ~id1~0 != ~id4~0; 350#L333 assume ~id1~0 != ~id5~0; 372#L334 assume ~id1~0 != ~id6~0; 344#L335 assume ~id1~0 != ~id7~0; 345#L336 assume ~id1~0 != ~id8~0; 428#L337 assume ~id2~0 != ~id3~0; 400#L338 assume ~id2~0 != ~id4~0; 401#L339 assume ~id2~0 != ~id5~0; 443#L340 assume ~id2~0 != ~id6~0; 438#L341 assume ~id2~0 != ~id7~0; 375#L342 assume ~id2~0 != ~id8~0; 376#L343 assume ~id3~0 != ~id4~0; 362#L344 assume ~id3~0 != ~id5~0; 363#L345 assume ~id3~0 != ~id6~0; 388#L346 assume ~id3~0 != ~id7~0; 389#L347 assume ~id3~0 != ~id8~0; 446#L348 assume ~id4~0 != ~id5~0; 435#L349 assume ~id4~0 != ~id6~0; 436#L350 assume ~id4~0 != ~id7~0; 422#L351 assume ~id4~0 != ~id8~0; 423#L352 assume ~id5~0 != ~id6~0; 439#L353 assume ~id5~0 != ~id7~0; 408#L354 assume ~id5~0 != ~id8~0; 377#L355 assume ~id6~0 != ~id7~0; 378#L356 assume ~id6~0 != ~id8~0; 407#L357 assume ~id7~0 != ~id8~0;init_~tmp~0#1 := 1; 370#L297-1 init_#res#1 := init_~tmp~0#1; 318#L542 main_#t~ret45#1 := init_#res#1;assume { :end_inline_init } true;main_~i2~0#1 := main_#t~ret45#1;havoc main_#t~ret45#1;assume { :begin_inline_assume_abort_if_not } true;assume_abort_if_not_#in~cond#1 := main_~i2~0#1;havoc assume_abort_if_not_~cond#1;assume_abort_if_not_~cond#1 := assume_abort_if_not_#in~cond#1; 319#L24 assume !(0 == assume_abort_if_not_~cond#1); 329#L23 assume { :end_inline_assume_abort_if_not } true;~p1_old~0 := ~nomsg~0;~p1_new~0 := ~nomsg~0;~p2_old~0 := ~nomsg~0;~p2_new~0 := ~nomsg~0;~p3_old~0 := ~nomsg~0;~p3_new~0 := ~nomsg~0;~p4_old~0 := ~nomsg~0;~p4_new~0 := ~nomsg~0;~p5_old~0 := ~nomsg~0;~p5_new~0 := ~nomsg~0;~p6_old~0 := ~nomsg~0;~p6_new~0 := ~nomsg~0;~p7_old~0 := ~nomsg~0;~p7_new~0 := ~nomsg~0;~p8_old~0 := ~nomsg~0;~p8_new~0 := ~nomsg~0;main_~i2~0#1 := 0; 330#L632-2 [2021-12-15 17:23:14,813 INFO L793 eck$LassoCheckResult]: Loop: 330#L632-2 assume !false;assume { :begin_inline_node1 } true;havoc node1_#t~ite4#1, node1_~m1~0#1;havoc node1_~m1~0#1;node1_~m1~0#1 := ~nomsg~0; 447#L94 assume !(0 != ~mode1~0 % 256); 339#L108 assume ~send1~0 != ~nomsg~0 && ~p1_new~0 == ~nomsg~0;node1_#t~ite4#1 := ~send1~0; 340#L108-2 ~p1_new~0 := (if node1_#t~ite4#1 % 256 <= 127 then node1_#t~ite4#1 % 256 else node1_#t~ite4#1 % 256 - 256);havoc node1_#t~ite4#1;~mode1~0 := 1; 336#L94-2 assume { :end_inline_node1 } true;assume { :begin_inline_node2 } true;havoc node2_#t~ite5#1, node2_~m2~0#1;havoc node2_~m2~0#1;node2_~m2~0#1 := ~nomsg~0; 391#L120 assume 0 != ~mode2~0 % 256;node2_~m2~0#1 := ~p1_old~0;~p1_old~0 := ~nomsg~0; 341#L123 assume !(node2_~m2~0#1 != ~nomsg~0); 342#L123-1 ~mode2~0 := 0; 349#L120-2 assume { :end_inline_node2 } true;assume { :begin_inline_node3 } true;havoc node3_#t~ite6#1, node3_~m3~0#1;havoc node3_~m3~0#1;node3_~m3~0#1 := ~nomsg~0; 364#L145 assume 0 != ~mode3~0 % 256;node3_~m3~0#1 := ~p2_old~0;~p2_old~0 := ~nomsg~0; 357#L148 assume !(node3_~m3~0#1 != ~nomsg~0); 358#L148-1 ~mode3~0 := 0; 328#L145-2 assume { :end_inline_node3 } true;assume { :begin_inline_node4 } true;havoc node4_#t~ite7#1, node4_~m4~0#1;havoc node4_~m4~0#1;node4_~m4~0#1 := ~nomsg~0; 402#L170 assume !(0 != ~mode4~0 % 256); 355#L183 assume ~send4~0 != ~nomsg~0 && ~p4_new~0 == ~nomsg~0;node4_#t~ite7#1 := ~send4~0; 356#L183-2 ~p4_new~0 := (if node4_#t~ite7#1 % 256 <= 127 then node4_#t~ite7#1 % 256 else node4_#t~ite7#1 % 256 - 256);havoc node4_#t~ite7#1;~mode4~0 := 1; 379#L170-2 assume { :end_inline_node4 } true;assume { :begin_inline_node5 } true;havoc node5_#t~ite8#1, node5_~m5~0#1;havoc node5_~m5~0#1;node5_~m5~0#1 := ~nomsg~0; 394#L195 assume 0 != ~mode5~0 % 256;node5_~m5~0#1 := ~p4_old~0;~p4_old~0 := ~nomsg~0; 424#L198 assume !(node5_~m5~0#1 != ~nomsg~0); 398#L198-1 ~mode5~0 := 0; 427#L195-2 assume { :end_inline_node5 } true;assume { :begin_inline_node6 } true;havoc node6_#t~ite9#1, node6_~m6~0#1;havoc node6_~m6~0#1;node6_~m6~0#1 := ~nomsg~0; 414#L220 assume !(0 != ~mode6~0 % 256); 416#L233 assume ~send6~0 != ~nomsg~0 && ~p6_new~0 == ~nomsg~0;node6_#t~ite9#1 := ~send6~0; 410#L233-2 ~p6_new~0 := (if node6_#t~ite9#1 % 256 <= 127 then node6_#t~ite9#1 % 256 else node6_#t~ite9#1 % 256 - 256);havoc node6_#t~ite9#1;~mode6~0 := 1; 312#L220-2 assume { :end_inline_node6 } true;assume { :begin_inline_node7 } true;havoc node7_#t~ite10#1, node7_~m7~0#1;havoc node7_~m7~0#1;node7_~m7~0#1 := ~nomsg~0; 351#L245 assume !(0 != ~mode7~0 % 256); 352#L258 assume ~send7~0 != ~nomsg~0 && ~p7_new~0 == ~nomsg~0;node7_#t~ite10#1 := ~send7~0; 369#L258-2 ~p7_new~0 := (if node7_#t~ite10#1 % 256 <= 127 then node7_#t~ite10#1 % 256 else node7_#t~ite10#1 % 256 - 256);havoc node7_#t~ite10#1;~mode7~0 := 1; 426#L245-2 assume { :end_inline_node7 } true;assume { :begin_inline_node8 } true;havoc node8_#t~ite11#1, node8_~m8~0#1;havoc node8_~m8~0#1;node8_~m8~0#1 := ~nomsg~0; 320#L270 assume !(0 != ~mode8~0 % 256); 321#L283 assume ~send8~0 != ~nomsg~0 && ~p8_new~0 == ~nomsg~0;node8_#t~ite11#1 := ~send8~0; 331#L283-2 ~p8_new~0 := (if node8_#t~ite11#1 % 256 <= 127 then node8_#t~ite11#1 % 256 else node8_#t~ite11#1 % 256 - 256);havoc node8_#t~ite11#1;~mode8~0 := 1; 332#L270-2 assume { :end_inline_node8 } true;~p1_old~0 := ~p1_new~0;~p1_new~0 := ~nomsg~0;~p2_old~0 := ~p2_new~0;~p2_new~0 := ~nomsg~0;~p3_old~0 := ~p3_new~0;~p3_new~0 := ~nomsg~0;~p4_old~0 := ~p4_new~0;~p4_new~0 := ~nomsg~0;~p5_old~0 := ~p5_new~0;~p5_new~0 := ~nomsg~0;~p6_old~0 := ~p6_new~0;~p6_new~0 := ~nomsg~0;~p7_old~0 := ~p7_new~0;~p7_new~0 := ~nomsg~0;~p8_old~0 := ~p8_new~0;~p8_new~0 := ~nomsg~0;assume { :begin_inline_check } true;havoc check_#res#1;havoc check_~tmp~1#1;havoc check_~tmp~1#1; 417#L550 assume !(~st1~0 + ~st2~0 + ~st3~0 + ~st4~0 + ~st5~0 + ~st6~0 + ~st7~0 + ~st8~0 <= 1);check_~tmp~1#1 := 0; 385#L550-1 check_#res#1 := check_~tmp~1#1; 381#L570 main_#t~ret46#1 := check_#res#1;assume { :end_inline_check } true;main_~c1~0#1 := main_#t~ret46#1;havoc main_#t~ret46#1;assume { :begin_inline_assert } true;assert_#in~arg#1 := (if 0 == main_~c1~0#1 then 0 else 1);havoc assert_~arg#1;assert_~arg#1 := assert_#in~arg#1; 382#L670 assume !(0 == assert_~arg#1 % 256); 393#L665 assume { :end_inline_assert } true; 330#L632-2 [2021-12-15 17:23:14,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 17:23:14,813 INFO L85 PathProgramCache]: Analyzing trace with hash 354076320, now seen corresponding path program 1 times [2021-12-15 17:23:14,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 17:23:14,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281945207] [2021-12-15 17:23:14,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 17:23:14,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 17:23:14,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 17:23:14,855 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-15 17:23:14,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 17:23:14,957 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-15 17:23:14,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 17:23:14,959 INFO L85 PathProgramCache]: Analyzing trace with hash 112147223, now seen corresponding path program 1 times [2021-12-15 17:23:14,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 17:23:14,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946155807] [2021-12-15 17:23:14,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 17:23:14,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 17:23:15,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 17:23:15,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 17:23:15,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 17:23:15,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946155807] [2021-12-15 17:23:15,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946155807] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 17:23:15,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 17:23:15,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 17:23:15,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711406476] [2021-12-15 17:23:15,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 17:23:15,082 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-15 17:23:15,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 17:23:15,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 17:23:15,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 17:23:15,083 INFO L87 Difference]: Start difference. First operand 141 states and 186 transitions. cyclomatic complexity: 46 Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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) [2021-12-15 17:23:15,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 17:23:15,123 INFO L93 Difference]: Finished difference Result 144 states and 188 transitions. [2021-12-15 17:23:15,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 17:23:15,124 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 144 states and 188 transitions. [2021-12-15 17:23:15,126 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 74 [2021-12-15 17:23:15,129 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 144 states to 141 states and 183 transitions. [2021-12-15 17:23:15,130 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 141 [2021-12-15 17:23:15,131 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 141 [2021-12-15 17:23:15,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 141 states and 183 transitions. [2021-12-15 17:23:15,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-15 17:23:15,137 INFO L681 BuchiCegarLoop]: Abstraction has 141 states and 183 transitions. [2021-12-15 17:23:15,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states and 183 transitions. [2021-12-15 17:23:15,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-12-15 17:23:15,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 141 states have (on average 1.297872340425532) internal successors, (183), 140 states have internal predecessors, (183), 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) [2021-12-15 17:23:15,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 183 transitions. [2021-12-15 17:23:15,147 INFO L704 BuchiCegarLoop]: Abstraction has 141 states and 183 transitions. [2021-12-15 17:23:15,147 INFO L587 BuchiCegarLoop]: Abstraction has 141 states and 183 transitions. [2021-12-15 17:23:15,147 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-12-15 17:23:15,147 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 141 states and 183 transitions. [2021-12-15 17:23:15,148 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 74 [2021-12-15 17:23:15,148 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-15 17:23:15,148 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-15 17:23:15,150 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 17:23:15,150 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 17:23:15,150 INFO L791 eck$LassoCheckResult]: Stem: 745#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(41, 2);call #Ultimate.allocInit(12, 3);~nomsg~0 := -1;~r1~0 := 0;~p1~0 := 0;~p1_old~0 := 0;~p1_new~0 := 0;~id1~0 := 0;~st1~0 := 0;~send1~0 := 0;~mode1~0 := 0;~p2~0 := 0;~p2_old~0 := 0;~p2_new~0 := 0;~id2~0 := 0;~st2~0 := 0;~send2~0 := 0;~mode2~0 := 0;~p3~0 := 0;~p3_old~0 := 0;~p3_new~0 := 0;~id3~0 := 0;~st3~0 := 0;~send3~0 := 0;~mode3~0 := 0;~p4~0 := 0;~p4_old~0 := 0;~p4_new~0 := 0;~id4~0 := 0;~st4~0 := 0;~send4~0 := 0;~mode4~0 := 0;~p5~0 := 0;~p5_old~0 := 0;~p5_new~0 := 0;~id5~0 := 0;~st5~0 := 0;~send5~0 := 0;~mode5~0 := 0;~p6~0 := 0;~p6_old~0 := 0;~p6_new~0 := 0;~id6~0 := 0;~st6~0 := 0;~send6~0 := 0;~mode6~0 := 0;~p7~0 := 0;~p7_old~0 := 0;~p7_new~0 := 0;~id7~0 := 0;~st7~0 := 0;~send7~0 := 0;~mode7~0 := 0;~p8~0 := 0;~p8_old~0 := 0;~p8_new~0 := 0;~id8~0 := 0;~st8~0 := 0;~send8~0 := 0;~mode8~0 := 0;~nodes~0.base, ~nodes~0.offset := ~nodes~0.base[0 := #funAddr~node1.base], ~nodes~0.offset[0 := #funAddr~node1.offset];~nodes~0.base, ~nodes~0.offset := ~nodes~0.base[1 := #funAddr~node2.base], ~nodes~0.offset[1 := #funAddr~node2.offset];~nodes~0.base, ~nodes~0.offset := ~nodes~0.base[2 := #funAddr~node3.base], ~nodes~0.offset[2 := #funAddr~node3.offset];~nodes~0.base, ~nodes~0.offset := ~nodes~0.base[3 := #funAddr~node4.base], ~nodes~0.offset[3 := #funAddr~node4.offset];~nodes~0.base, ~nodes~0.offset := ~nodes~0.base[4 := #funAddr~node5.base], ~nodes~0.offset[4 := #funAddr~node5.offset];~nodes~0.base, ~nodes~0.offset := ~nodes~0.base[5 := #funAddr~node6.base], ~nodes~0.offset[5 := #funAddr~node6.offset];~nodes~0.base, ~nodes~0.offset := ~nodes~0.base[6 := #funAddr~node7.base], ~nodes~0.offset[6 := #funAddr~node7.offset];~nodes~0.base, ~nodes~0.offset := ~nodes~0.base[7 := #funAddr~node8.base], ~nodes~0.offset[7 := #funAddr~node8.offset]; 680#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet12#1, main_#t~nondet13#1, main_#t~nondet14#1, main_#t~nondet15#1, main_#t~nondet16#1, main_#t~nondet17#1, main_#t~nondet18#1, main_#t~nondet19#1, main_#t~nondet20#1, main_#t~nondet21#1, main_#t~nondet22#1, main_#t~nondet23#1, main_#t~nondet24#1, main_#t~nondet25#1, main_#t~nondet26#1, main_#t~nondet27#1, main_#t~nondet28#1, main_#t~nondet29#1, main_#t~nondet30#1, main_#t~nondet31#1, main_#t~nondet32#1, main_#t~nondet33#1, main_#t~nondet34#1, main_#t~nondet35#1, main_#t~nondet36#1, main_#t~nondet37#1, main_#t~nondet38#1, main_#t~nondet39#1, main_#t~nondet40#1, main_#t~nondet41#1, main_#t~nondet42#1, main_#t~nondet43#1, main_#t~nondet44#1, main_#t~ret45#1, main_#t~ret46#1, main_~c1~0#1, main_~i2~0#1;havoc main_~c1~0#1;havoc main_~i2~0#1;main_~c1~0#1 := 0;~r1~0 := main_#t~nondet12#1;havoc main_#t~nondet12#1;~id1~0 := main_#t~nondet13#1;havoc main_#t~nondet13#1;~st1~0 := main_#t~nondet14#1;havoc main_#t~nondet14#1;~send1~0 := main_#t~nondet15#1;havoc main_#t~nondet15#1;~mode1~0 := main_#t~nondet16#1;havoc main_#t~nondet16#1;~id2~0 := main_#t~nondet17#1;havoc main_#t~nondet17#1;~st2~0 := main_#t~nondet18#1;havoc main_#t~nondet18#1;~send2~0 := main_#t~nondet19#1;havoc main_#t~nondet19#1;~mode2~0 := main_#t~nondet20#1;havoc main_#t~nondet20#1;~id3~0 := main_#t~nondet21#1;havoc main_#t~nondet21#1;~st3~0 := main_#t~nondet22#1;havoc main_#t~nondet22#1;~send3~0 := main_#t~nondet23#1;havoc main_#t~nondet23#1;~mode3~0 := main_#t~nondet24#1;havoc main_#t~nondet24#1;~id4~0 := main_#t~nondet25#1;havoc main_#t~nondet25#1;~st4~0 := main_#t~nondet26#1;havoc main_#t~nondet26#1;~send4~0 := main_#t~nondet27#1;havoc main_#t~nondet27#1;~mode4~0 := main_#t~nondet28#1;havoc main_#t~nondet28#1;~id5~0 := main_#t~nondet29#1;havoc main_#t~nondet29#1;~st5~0 := main_#t~nondet30#1;havoc main_#t~nondet30#1;~send5~0 := main_#t~nondet31#1;havoc main_#t~nondet31#1;~mode5~0 := main_#t~nondet32#1;havoc main_#t~nondet32#1;~id6~0 := main_#t~nondet33#1;havoc main_#t~nondet33#1;~st6~0 := main_#t~nondet34#1;havoc main_#t~nondet34#1;~send6~0 := main_#t~nondet35#1;havoc main_#t~nondet35#1;~mode6~0 := main_#t~nondet36#1;havoc main_#t~nondet36#1;~id7~0 := main_#t~nondet37#1;havoc main_#t~nondet37#1;~st7~0 := main_#t~nondet38#1;havoc main_#t~nondet38#1;~send7~0 := main_#t~nondet39#1;havoc main_#t~nondet39#1;~mode7~0 := main_#t~nondet40#1;havoc main_#t~nondet40#1;~id8~0 := main_#t~nondet41#1;havoc main_#t~nondet41#1;~st8~0 := main_#t~nondet42#1;havoc main_#t~nondet42#1;~send8~0 := main_#t~nondet43#1;havoc main_#t~nondet43#1;~mode8~0 := main_#t~nondet44#1;havoc main_#t~nondet44#1;assume { :begin_inline_init } true;havoc init_#res#1;havoc init_~tmp~0#1;havoc init_~tmp~0#1; 668#L297 assume 0 == ~r1~0 % 256; 658#L298 assume ~id1~0 >= 0; 659#L299 assume 0 == ~st1~0; 677#L300 assume ~send1~0 == ~id1~0; 718#L301 assume 0 == ~mode1~0 % 256; 730#L302 assume ~id2~0 >= 0; 731#L303 assume 0 == ~st2~0; 737#L304 assume ~send2~0 == ~id2~0; 709#L305 assume 0 == ~mode2~0 % 256; 710#L306 assume ~id3~0 >= 0; 726#L307 assume 0 == ~st3~0; 622#L308 assume ~send3~0 == ~id3~0; 623#L309 assume 0 == ~mode3~0 % 256; 722#L310 assume ~id4~0 >= 0; 692#L311 assume 0 == ~st4~0; 693#L312 assume ~send4~0 == ~id4~0; 643#L313 assume 0 == ~mode4~0 % 256; 644#L314 assume ~id5~0 >= 0; 683#L315 assume 0 == ~st5~0; 684#L316 assume ~send5~0 == ~id5~0; 610#L317 assume 0 == ~mode5~0 % 256; 611#L318 assume ~id6~0 >= 0; 746#L319 assume 0 == ~st6~0; 729#L320 assume ~send6~0 == ~id6~0; 715#L321 assume 0 == ~mode6~0 % 256; 716#L322 assume ~id7~0 >= 0; 606#L323 assume 0 == ~st7~0; 607#L324 assume ~send7~0 == ~id7~0; 633#L325 assume 0 == ~mode7~0 % 256; 651#L326 assume ~id8~0 >= 0; 634#L327 assume 0 == ~st8~0; 635#L328 assume ~send8~0 == ~id8~0; 670#L329 assume 0 == ~mode8~0 % 256; 671#L330 assume ~id1~0 != ~id2~0; 620#L331 assume ~id1~0 != ~id3~0; 621#L332 assume ~id1~0 != ~id4~0; 647#L333 assume ~id1~0 != ~id5~0; 669#L334 assume ~id1~0 != ~id6~0; 641#L335 assume ~id1~0 != ~id7~0; 642#L336 assume ~id1~0 != ~id8~0; 725#L337 assume ~id2~0 != ~id3~0; 697#L338 assume ~id2~0 != ~id4~0; 698#L339 assume ~id2~0 != ~id5~0; 740#L340 assume ~id2~0 != ~id6~0; 735#L341 assume ~id2~0 != ~id7~0; 672#L342 assume ~id2~0 != ~id8~0; 673#L343 assume ~id3~0 != ~id4~0; 660#L344 assume ~id3~0 != ~id5~0; 661#L345 assume ~id3~0 != ~id6~0; 685#L346 assume ~id3~0 != ~id7~0; 686#L347 assume ~id3~0 != ~id8~0; 743#L348 assume ~id4~0 != ~id5~0; 732#L349 assume ~id4~0 != ~id6~0; 733#L350 assume ~id4~0 != ~id7~0; 719#L351 assume ~id4~0 != ~id8~0; 720#L352 assume ~id5~0 != ~id6~0; 736#L353 assume ~id5~0 != ~id7~0; 705#L354 assume ~id5~0 != ~id8~0; 674#L355 assume ~id6~0 != ~id7~0; 675#L356 assume ~id6~0 != ~id8~0; 702#L357 assume ~id7~0 != ~id8~0;init_~tmp~0#1 := 1; 667#L297-1 init_#res#1 := init_~tmp~0#1; 615#L542 main_#t~ret45#1 := init_#res#1;assume { :end_inline_init } true;main_~i2~0#1 := main_#t~ret45#1;havoc main_#t~ret45#1;assume { :begin_inline_assume_abort_if_not } true;assume_abort_if_not_#in~cond#1 := main_~i2~0#1;havoc assume_abort_if_not_~cond#1;assume_abort_if_not_~cond#1 := assume_abort_if_not_#in~cond#1; 616#L24 assume !(0 == assume_abort_if_not_~cond#1); 626#L23 assume { :end_inline_assume_abort_if_not } true;~p1_old~0 := ~nomsg~0;~p1_new~0 := ~nomsg~0;~p2_old~0 := ~nomsg~0;~p2_new~0 := ~nomsg~0;~p3_old~0 := ~nomsg~0;~p3_new~0 := ~nomsg~0;~p4_old~0 := ~nomsg~0;~p4_new~0 := ~nomsg~0;~p5_old~0 := ~nomsg~0;~p5_new~0 := ~nomsg~0;~p6_old~0 := ~nomsg~0;~p6_new~0 := ~nomsg~0;~p7_old~0 := ~nomsg~0;~p7_new~0 := ~nomsg~0;~p8_old~0 := ~nomsg~0;~p8_new~0 := ~nomsg~0;main_~i2~0#1 := 0; 627#L632-2 [2021-12-15 17:23:15,151 INFO L793 eck$LassoCheckResult]: Loop: 627#L632-2 assume !false;assume { :begin_inline_node1 } true;havoc node1_#t~ite4#1, node1_~m1~0#1;havoc node1_~m1~0#1;node1_~m1~0#1 := ~nomsg~0; 744#L94 assume 0 != ~mode1~0 % 256;~r1~0 := 1 + ~r1~0 % 256;node1_~m1~0#1 := ~p8_old~0;~p8_old~0 := ~nomsg~0; 738#L98 assume !(node1_~m1~0#1 != ~nomsg~0); 631#L98-1 ~mode1~0 := 0; 632#L94-2 assume { :end_inline_node1 } true;assume { :begin_inline_node2 } true;havoc node2_#t~ite5#1, node2_~m2~0#1;havoc node2_~m2~0#1;node2_~m2~0#1 := ~nomsg~0; 688#L120 assume !(0 != ~mode2~0 % 256); 689#L133 assume !(~send2~0 != ~nomsg~0 && ~p2_new~0 == ~nomsg~0);node2_#t~ite5#1 := ~p2_new~0; 645#L133-2 ~p2_new~0 := (if node2_#t~ite5#1 % 256 <= 127 then node2_#t~ite5#1 % 256 else node2_#t~ite5#1 % 256 - 256);havoc node2_#t~ite5#1;~mode2~0 := 1; 646#L120-2 assume { :end_inline_node2 } true;assume { :begin_inline_node3 } true;havoc node3_#t~ite6#1, node3_~m3~0#1;havoc node3_~m3~0#1;node3_~m3~0#1 := ~nomsg~0; 657#L145 assume !(0 != ~mode3~0 % 256); 630#L158 assume !(~send3~0 != ~nomsg~0 && ~p3_new~0 == ~nomsg~0);node3_#t~ite6#1 := ~p3_new~0; 624#L158-2 ~p3_new~0 := (if node3_#t~ite6#1 % 256 <= 127 then node3_#t~ite6#1 % 256 else node3_#t~ite6#1 % 256 - 256);havoc node3_#t~ite6#1;~mode3~0 := 1; 625#L145-2 assume { :end_inline_node3 } true;assume { :begin_inline_node4 } true;havoc node4_#t~ite7#1, node4_~m4~0#1;havoc node4_~m4~0#1;node4_~m4~0#1 := ~nomsg~0; 699#L170 assume !(0 != ~mode4~0 % 256); 652#L183 assume ~send4~0 != ~nomsg~0 && ~p4_new~0 == ~nomsg~0;node4_#t~ite7#1 := ~send4~0; 653#L183-2 ~p4_new~0 := (if node4_#t~ite7#1 % 256 <= 127 then node4_#t~ite7#1 % 256 else node4_#t~ite7#1 % 256 - 256);havoc node4_#t~ite7#1;~mode4~0 := 1; 676#L170-2 assume { :end_inline_node4 } true;assume { :begin_inline_node5 } true;havoc node5_#t~ite8#1, node5_~m5~0#1;havoc node5_~m5~0#1;node5_~m5~0#1 := ~nomsg~0; 691#L195 assume 0 != ~mode5~0 % 256;node5_~m5~0#1 := ~p4_old~0;~p4_old~0 := ~nomsg~0; 721#L198 assume !(node5_~m5~0#1 != ~nomsg~0); 695#L198-1 ~mode5~0 := 0; 724#L195-2 assume { :end_inline_node5 } true;assume { :begin_inline_node6 } true;havoc node6_#t~ite9#1, node6_~m6~0#1;havoc node6_~m6~0#1;node6_~m6~0#1 := ~nomsg~0; 711#L220 assume 0 != ~mode6~0 % 256;node6_~m6~0#1 := ~p5_old~0;~p5_old~0 := ~nomsg~0; 712#L223 assume !(node6_~m6~0#1 != ~nomsg~0); 608#L223-1 ~mode6~0 := 0; 609#L220-2 assume { :end_inline_node6 } true;assume { :begin_inline_node7 } true;havoc node7_#t~ite10#1, node7_~m7~0#1;havoc node7_~m7~0#1;node7_~m7~0#1 := ~nomsg~0; 648#L245 assume !(0 != ~mode7~0 % 256); 649#L258 assume ~send7~0 != ~nomsg~0 && ~p7_new~0 == ~nomsg~0;node7_#t~ite10#1 := ~send7~0; 666#L258-2 ~p7_new~0 := (if node7_#t~ite10#1 % 256 <= 127 then node7_#t~ite10#1 % 256 else node7_#t~ite10#1 % 256 - 256);havoc node7_#t~ite10#1;~mode7~0 := 1; 723#L245-2 assume { :end_inline_node7 } true;assume { :begin_inline_node8 } true;havoc node8_#t~ite11#1, node8_~m8~0#1;havoc node8_~m8~0#1;node8_~m8~0#1 := ~nomsg~0; 617#L270 assume !(0 != ~mode8~0 % 256); 618#L283 assume ~send8~0 != ~nomsg~0 && ~p8_new~0 == ~nomsg~0;node8_#t~ite11#1 := ~send8~0; 628#L283-2 ~p8_new~0 := (if node8_#t~ite11#1 % 256 <= 127 then node8_#t~ite11#1 % 256 else node8_#t~ite11#1 % 256 - 256);havoc node8_#t~ite11#1;~mode8~0 := 1; 629#L270-2 assume { :end_inline_node8 } true;~p1_old~0 := ~p1_new~0;~p1_new~0 := ~nomsg~0;~p2_old~0 := ~p2_new~0;~p2_new~0 := ~nomsg~0;~p3_old~0 := ~p3_new~0;~p3_new~0 := ~nomsg~0;~p4_old~0 := ~p4_new~0;~p4_new~0 := ~nomsg~0;~p5_old~0 := ~p5_new~0;~p5_new~0 := ~nomsg~0;~p6_old~0 := ~p6_new~0;~p6_new~0 := ~nomsg~0;~p7_old~0 := ~p7_new~0;~p7_new~0 := ~nomsg~0;~p8_old~0 := ~p8_new~0;~p8_new~0 := ~nomsg~0;assume { :begin_inline_check } true;havoc check_#res#1;havoc check_~tmp~1#1;havoc check_~tmp~1#1; 714#L550 assume ~st1~0 + ~st2~0 + ~st3~0 + ~st4~0 + ~st5~0 + ~st6~0 + ~st7~0 + ~st8~0 <= 1; 663#L551 assume ~r1~0 % 256 >= 8; 664#L555 assume ~r1~0 % 256 < 8;check_~tmp~1#1 := 1; 682#L550-1 check_#res#1 := check_~tmp~1#1; 678#L570 main_#t~ret46#1 := check_#res#1;assume { :end_inline_check } true;main_~c1~0#1 := main_#t~ret46#1;havoc main_#t~ret46#1;assume { :begin_inline_assert } true;assert_#in~arg#1 := (if 0 == main_~c1~0#1 then 0 else 1);havoc assert_~arg#1;assert_~arg#1 := assert_#in~arg#1; 679#L670 assume !(0 == assert_~arg#1 % 256); 690#L665 assume { :end_inline_assert } true; 627#L632-2 [2021-12-15 17:23:15,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 17:23:15,151 INFO L85 PathProgramCache]: Analyzing trace with hash 354076320, now seen corresponding path program 2 times [2021-12-15 17:23:15,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 17:23:15,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392673389] [2021-12-15 17:23:15,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 17:23:15,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 17:23:15,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 17:23:15,185 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-15 17:23:15,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 17:23:15,234 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-15 17:23:15,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 17:23:15,235 INFO L85 PathProgramCache]: Analyzing trace with hash 630902819, now seen corresponding path program 1 times [2021-12-15 17:23:15,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 17:23:15,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989254018] [2021-12-15 17:23:15,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 17:23:15,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 17:23:15,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 17:23:15,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 17:23:15,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 17:23:15,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989254018] [2021-12-15 17:23:15,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989254018] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 17:23:15,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 17:23:15,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 17:23:15,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199985005] [2021-12-15 17:23:15,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 17:23:15,264 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-15 17:23:15,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 17:23:15,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 17:23:15,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 17:23:15,265 INFO L87 Difference]: Start difference. First operand 141 states and 183 transitions. cyclomatic complexity: 43 Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2021-12-15 17:23:15,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 17:23:15,285 INFO L93 Difference]: Finished difference Result 209 states and 288 transitions. [2021-12-15 17:23:15,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 17:23:15,286 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 209 states and 288 transitions. [2021-12-15 17:23:15,288 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 142 [2021-12-15 17:23:15,289 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 209 states to 209 states and 288 transitions. [2021-12-15 17:23:15,289 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 209 [2021-12-15 17:23:15,290 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 209 [2021-12-15 17:23:15,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 209 states and 288 transitions. [2021-12-15 17:23:15,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-15 17:23:15,291 INFO L681 BuchiCegarLoop]: Abstraction has 209 states and 288 transitions. [2021-12-15 17:23:15,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states and 288 transitions. [2021-12-15 17:23:15,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2021-12-15 17:23:15,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 209 states have (on average 1.3779904306220097) internal successors, (288), 208 states have internal predecessors, (288), 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) [2021-12-15 17:23:15,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 288 transitions. [2021-12-15 17:23:15,298 INFO L704 BuchiCegarLoop]: Abstraction has 209 states and 288 transitions. [2021-12-15 17:23:15,298 INFO L587 BuchiCegarLoop]: Abstraction has 209 states and 288 transitions. [2021-12-15 17:23:15,298 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-12-15 17:23:15,298 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 209 states and 288 transitions. [2021-12-15 17:23:15,299 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 142 [2021-12-15 17:23:15,299 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-15 17:23:15,299 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-15 17:23:15,301 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 17:23:15,301 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 17:23:15,301 INFO L791 eck$LassoCheckResult]: Stem: 1102#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(41, 2);call #Ultimate.allocInit(12, 3);~nomsg~0 := -1;~r1~0 := 0;~p1~0 := 0;~p1_old~0 := 0;~p1_new~0 := 0;~id1~0 := 0;~st1~0 := 0;~send1~0 := 0;~mode1~0 := 0;~p2~0 := 0;~p2_old~0 := 0;~p2_new~0 := 0;~id2~0 := 0;~st2~0 := 0;~send2~0 := 0;~mode2~0 := 0;~p3~0 := 0;~p3_old~0 := 0;~p3_new~0 := 0;~id3~0 := 0;~st3~0 := 0;~send3~0 := 0;~mode3~0 := 0;~p4~0 := 0;~p4_old~0 := 0;~p4_new~0 := 0;~id4~0 := 0;~st4~0 := 0;~send4~0 := 0;~mode4~0 := 0;~p5~0 := 0;~p5_old~0 := 0;~p5_new~0 := 0;~id5~0 := 0;~st5~0 := 0;~send5~0 := 0;~mode5~0 := 0;~p6~0 := 0;~p6_old~0 := 0;~p6_new~0 := 0;~id6~0 := 0;~st6~0 := 0;~send6~0 := 0;~mode6~0 := 0;~p7~0 := 0;~p7_old~0 := 0;~p7_new~0 := 0;~id7~0 := 0;~st7~0 := 0;~send7~0 := 0;~mode7~0 := 0;~p8~0 := 0;~p8_old~0 := 0;~p8_new~0 := 0;~id8~0 := 0;~st8~0 := 0;~send8~0 := 0;~mode8~0 := 0;~nodes~0.base, ~nodes~0.offset := ~nodes~0.base[0 := #funAddr~node1.base], ~nodes~0.offset[0 := #funAddr~node1.offset];~nodes~0.base, ~nodes~0.offset := ~nodes~0.base[1 := #funAddr~node2.base], ~nodes~0.offset[1 := #funAddr~node2.offset];~nodes~0.base, ~nodes~0.offset := ~nodes~0.base[2 := #funAddr~node3.base], ~nodes~0.offset[2 := #funAddr~node3.offset];~nodes~0.base, ~nodes~0.offset := ~nodes~0.base[3 := #funAddr~node4.base], ~nodes~0.offset[3 := #funAddr~node4.offset];~nodes~0.base, ~nodes~0.offset := ~nodes~0.base[4 := #funAddr~node5.base], ~nodes~0.offset[4 := #funAddr~node5.offset];~nodes~0.base, ~nodes~0.offset := ~nodes~0.base[5 := #funAddr~node6.base], ~nodes~0.offset[5 := #funAddr~node6.offset];~nodes~0.base, ~nodes~0.offset := ~nodes~0.base[6 := #funAddr~node7.base], ~nodes~0.offset[6 := #funAddr~node7.offset];~nodes~0.base, ~nodes~0.offset := ~nodes~0.base[7 := #funAddr~node8.base], ~nodes~0.offset[7 := #funAddr~node8.offset]; 1035#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet12#1, main_#t~nondet13#1, main_#t~nondet14#1, main_#t~nondet15#1, main_#t~nondet16#1, main_#t~nondet17#1, main_#t~nondet18#1, main_#t~nondet19#1, main_#t~nondet20#1, main_#t~nondet21#1, main_#t~nondet22#1, main_#t~nondet23#1, main_#t~nondet24#1, main_#t~nondet25#1, main_#t~nondet26#1, main_#t~nondet27#1, main_#t~nondet28#1, main_#t~nondet29#1, main_#t~nondet30#1, main_#t~nondet31#1, main_#t~nondet32#1, main_#t~nondet33#1, main_#t~nondet34#1, main_#t~nondet35#1, main_#t~nondet36#1, main_#t~nondet37#1, main_#t~nondet38#1, main_#t~nondet39#1, main_#t~nondet40#1, main_#t~nondet41#1, main_#t~nondet42#1, main_#t~nondet43#1, main_#t~nondet44#1, main_#t~ret45#1, main_#t~ret46#1, main_~c1~0#1, main_~i2~0#1;havoc main_~c1~0#1;havoc main_~i2~0#1;main_~c1~0#1 := 0;~r1~0 := main_#t~nondet12#1;havoc main_#t~nondet12#1;~id1~0 := main_#t~nondet13#1;havoc main_#t~nondet13#1;~st1~0 := main_#t~nondet14#1;havoc main_#t~nondet14#1;~send1~0 := main_#t~nondet15#1;havoc main_#t~nondet15#1;~mode1~0 := main_#t~nondet16#1;havoc main_#t~nondet16#1;~id2~0 := main_#t~nondet17#1;havoc main_#t~nondet17#1;~st2~0 := main_#t~nondet18#1;havoc main_#t~nondet18#1;~send2~0 := main_#t~nondet19#1;havoc main_#t~nondet19#1;~mode2~0 := main_#t~nondet20#1;havoc main_#t~nondet20#1;~id3~0 := main_#t~nondet21#1;havoc main_#t~nondet21#1;~st3~0 := main_#t~nondet22#1;havoc main_#t~nondet22#1;~send3~0 := main_#t~nondet23#1;havoc main_#t~nondet23#1;~mode3~0 := main_#t~nondet24#1;havoc main_#t~nondet24#1;~id4~0 := main_#t~nondet25#1;havoc main_#t~nondet25#1;~st4~0 := main_#t~nondet26#1;havoc main_#t~nondet26#1;~send4~0 := main_#t~nondet27#1;havoc main_#t~nondet27#1;~mode4~0 := main_#t~nondet28#1;havoc main_#t~nondet28#1;~id5~0 := main_#t~nondet29#1;havoc main_#t~nondet29#1;~st5~0 := main_#t~nondet30#1;havoc main_#t~nondet30#1;~send5~0 := main_#t~nondet31#1;havoc main_#t~nondet31#1;~mode5~0 := main_#t~nondet32#1;havoc main_#t~nondet32#1;~id6~0 := main_#t~nondet33#1;havoc main_#t~nondet33#1;~st6~0 := main_#t~nondet34#1;havoc main_#t~nondet34#1;~send6~0 := main_#t~nondet35#1;havoc main_#t~nondet35#1;~mode6~0 := main_#t~nondet36#1;havoc main_#t~nondet36#1;~id7~0 := main_#t~nondet37#1;havoc main_#t~nondet37#1;~st7~0 := main_#t~nondet38#1;havoc main_#t~nondet38#1;~send7~0 := main_#t~nondet39#1;havoc main_#t~nondet39#1;~mode7~0 := main_#t~nondet40#1;havoc main_#t~nondet40#1;~id8~0 := main_#t~nondet41#1;havoc main_#t~nondet41#1;~st8~0 := main_#t~nondet42#1;havoc main_#t~nondet42#1;~send8~0 := main_#t~nondet43#1;havoc main_#t~nondet43#1;~mode8~0 := main_#t~nondet44#1;havoc main_#t~nondet44#1;assume { :begin_inline_init } true;havoc init_#res#1;havoc init_~tmp~0#1;havoc init_~tmp~0#1; 1023#L297 assume 0 == ~r1~0 % 256; 1013#L298 assume ~id1~0 >= 0; 1014#L299 assume 0 == ~st1~0; 1031#L300 assume ~send1~0 == ~id1~0; 1073#L301 assume 0 == ~mode1~0 % 256; 1085#L302 assume ~id2~0 >= 0; 1086#L303 assume 0 == ~st2~0; 1094#L304 assume ~send2~0 == ~id2~0; 1064#L305 assume 0 == ~mode2~0 % 256; 1065#L306 assume ~id3~0 >= 0; 1081#L307 assume 0 == ~st3~0; 978#L308 assume ~send3~0 == ~id3~0; 979#L309 assume 0 == ~mode3~0 % 256; 1077#L310 assume ~id4~0 >= 0; 1046#L311 assume 0 == ~st4~0; 1047#L312 assume ~send4~0 == ~id4~0; 999#L313 assume 0 == ~mode4~0 % 256; 1000#L314 assume ~id5~0 >= 0; 1036#L315 assume 0 == ~st5~0; 1037#L316 assume ~send5~0 == ~id5~0; 964#L317 assume 0 == ~mode5~0 % 256; 965#L318 assume ~id6~0 >= 0; 1103#L319 assume 0 == ~st6~0; 1084#L320 assume ~send6~0 == ~id6~0; 1070#L321 assume 0 == ~mode6~0 % 256; 1071#L322 assume ~id7~0 >= 0; 962#L323 assume 0 == ~st7~0; 963#L324 assume ~send7~0 == ~id7~0; 987#L325 assume 0 == ~mode7~0 % 256; 1004#L326 assume ~id8~0 >= 0; 990#L327 assume 0 == ~st8~0; 991#L328 assume ~send8~0 == ~id8~0; 1025#L329 assume 0 == ~mode8~0 % 256; 1026#L330 assume ~id1~0 != ~id2~0; 976#L331 assume ~id1~0 != ~id3~0; 977#L332 assume ~id1~0 != ~id4~0; 1003#L333 assume ~id1~0 != ~id5~0; 1024#L334 assume ~id1~0 != ~id6~0; 997#L335 assume ~id1~0 != ~id7~0; 998#L336 assume ~id1~0 != ~id8~0; 1080#L337 assume ~id2~0 != ~id3~0; 1052#L338 assume ~id2~0 != ~id4~0; 1053#L339 assume ~id2~0 != ~id5~0; 1097#L340 assume ~id2~0 != ~id6~0; 1090#L341 assume ~id2~0 != ~id7~0; 1027#L342 assume ~id2~0 != ~id8~0; 1028#L343 assume ~id3~0 != ~id4~0; 1015#L344 assume ~id3~0 != ~id5~0; 1016#L345 assume ~id3~0 != ~id6~0; 1040#L346 assume ~id3~0 != ~id7~0; 1041#L347 assume ~id3~0 != ~id8~0; 1100#L348 assume ~id4~0 != ~id5~0; 1087#L349 assume ~id4~0 != ~id6~0; 1088#L350 assume ~id4~0 != ~id7~0; 1074#L351 assume ~id4~0 != ~id8~0; 1075#L352 assume ~id5~0 != ~id6~0; 1093#L353 assume ~id5~0 != ~id7~0; 1060#L354 assume ~id5~0 != ~id8~0; 1029#L355 assume ~id6~0 != ~id7~0; 1030#L356 assume ~id6~0 != ~id8~0; 1057#L357 assume ~id7~0 != ~id8~0;init_~tmp~0#1 := 1; 1022#L297-1 init_#res#1 := init_~tmp~0#1; 971#L542 main_#t~ret45#1 := init_#res#1;assume { :end_inline_init } true;main_~i2~0#1 := main_#t~ret45#1;havoc main_#t~ret45#1;assume { :begin_inline_assume_abort_if_not } true;assume_abort_if_not_#in~cond#1 := main_~i2~0#1;havoc assume_abort_if_not_~cond#1;assume_abort_if_not_~cond#1 := assume_abort_if_not_#in~cond#1; 972#L24 assume !(0 == assume_abort_if_not_~cond#1); 982#L23 assume { :end_inline_assume_abort_if_not } true;~p1_old~0 := ~nomsg~0;~p1_new~0 := ~nomsg~0;~p2_old~0 := ~nomsg~0;~p2_new~0 := ~nomsg~0;~p3_old~0 := ~nomsg~0;~p3_new~0 := ~nomsg~0;~p4_old~0 := ~nomsg~0;~p4_new~0 := ~nomsg~0;~p5_old~0 := ~nomsg~0;~p5_new~0 := ~nomsg~0;~p6_old~0 := ~nomsg~0;~p6_new~0 := ~nomsg~0;~p7_old~0 := ~nomsg~0;~p7_new~0 := ~nomsg~0;~p8_old~0 := ~nomsg~0;~p8_new~0 := ~nomsg~0;main_~i2~0#1 := 0; 983#L632-2 [2021-12-15 17:23:15,301 INFO L793 eck$LassoCheckResult]: Loop: 983#L632-2 assume !false;assume { :begin_inline_node1 } true;havoc node1_#t~ite4#1, node1_~m1~0#1;havoc node1_~m1~0#1;node1_~m1~0#1 := ~nomsg~0; 1166#L94 assume 0 != ~mode1~0 % 256;~r1~0 := 1 + ~r1~0 % 256;node1_~m1~0#1 := ~p8_old~0;~p8_old~0 := ~nomsg~0; 1095#L98 assume !(node1_~m1~0#1 != ~nomsg~0); 988#L98-1 ~mode1~0 := 0; 989#L94-2 assume { :end_inline_node1 } true;assume { :begin_inline_node2 } true;havoc node2_#t~ite5#1, node2_~m2~0#1;havoc node2_~m2~0#1;node2_~m2~0#1 := ~nomsg~0; 1163#L120 assume 0 != ~mode2~0 % 256;node2_~m2~0#1 := ~p1_old~0;~p1_old~0 := ~nomsg~0; 1160#L123 assume !(node2_~m2~0#1 != ~nomsg~0); 1158#L123-1 ~mode2~0 := 0; 1156#L120-2 assume { :end_inline_node2 } true;assume { :begin_inline_node3 } true;havoc node3_#t~ite6#1, node3_~m3~0#1;havoc node3_~m3~0#1;node3_~m3~0#1 := ~nomsg~0; 1155#L145 assume 0 != ~mode3~0 % 256;node3_~m3~0#1 := ~p2_old~0;~p2_old~0 := ~nomsg~0; 1152#L148 assume !(node3_~m3~0#1 != ~nomsg~0); 1150#L148-1 ~mode3~0 := 0; 1148#L145-2 assume { :end_inline_node3 } true;assume { :begin_inline_node4 } true;havoc node4_#t~ite7#1, node4_~m4~0#1;havoc node4_~m4~0#1;node4_~m4~0#1 := ~nomsg~0; 1147#L170 assume 0 != ~mode4~0 % 256;node4_~m4~0#1 := ~p3_old~0;~p3_old~0 := ~nomsg~0; 1144#L173 assume !(node4_~m4~0#1 != ~nomsg~0); 1142#L173-1 ~mode4~0 := 0; 1140#L170-2 assume { :end_inline_node4 } true;assume { :begin_inline_node5 } true;havoc node5_#t~ite8#1, node5_~m5~0#1;havoc node5_~m5~0#1;node5_~m5~0#1 := ~nomsg~0; 1139#L195 assume 0 != ~mode5~0 % 256;node5_~m5~0#1 := ~p4_old~0;~p4_old~0 := ~nomsg~0; 1137#L198 assume !(node5_~m5~0#1 != ~nomsg~0); 1134#L198-1 ~mode5~0 := 0; 1132#L195-2 assume { :end_inline_node5 } true;assume { :begin_inline_node6 } true;havoc node6_#t~ite9#1, node6_~m6~0#1;havoc node6_~m6~0#1;node6_~m6~0#1 := ~nomsg~0; 1131#L220 assume 0 != ~mode6~0 % 256;node6_~m6~0#1 := ~p5_old~0;~p5_old~0 := ~nomsg~0; 1129#L223 assume !(node6_~m6~0#1 != ~nomsg~0); 1126#L223-1 ~mode6~0 := 0; 1124#L220-2 assume { :end_inline_node6 } true;assume { :begin_inline_node7 } true;havoc node7_#t~ite10#1, node7_~m7~0#1;havoc node7_~m7~0#1;node7_~m7~0#1 := ~nomsg~0; 1123#L245 assume 0 != ~mode7~0 % 256;node7_~m7~0#1 := ~p6_old~0;~p6_old~0 := ~nomsg~0; 1121#L248 assume !(node7_~m7~0#1 != ~nomsg~0); 1118#L248-1 ~mode7~0 := 0; 1116#L245-2 assume { :end_inline_node7 } true;assume { :begin_inline_node8 } true;havoc node8_#t~ite11#1, node8_~m8~0#1;havoc node8_~m8~0#1;node8_~m8~0#1 := ~nomsg~0; 1115#L270 assume 0 != ~mode8~0 % 256;node8_~m8~0#1 := ~p7_old~0;~p7_old~0 := ~nomsg~0; 1113#L273 assume !(node8_~m8~0#1 != ~nomsg~0); 1110#L273-1 ~mode8~0 := 0; 1108#L270-2 assume { :end_inline_node8 } true;~p1_old~0 := ~p1_new~0;~p1_new~0 := ~nomsg~0;~p2_old~0 := ~p2_new~0;~p2_new~0 := ~nomsg~0;~p3_old~0 := ~p3_new~0;~p3_new~0 := ~nomsg~0;~p4_old~0 := ~p4_new~0;~p4_new~0 := ~nomsg~0;~p5_old~0 := ~p5_new~0;~p5_new~0 := ~nomsg~0;~p6_old~0 := ~p6_new~0;~p6_new~0 := ~nomsg~0;~p7_old~0 := ~p7_new~0;~p7_new~0 := ~nomsg~0;~p8_old~0 := ~p8_new~0;~p8_new~0 := ~nomsg~0;assume { :begin_inline_check } true;havoc check_#res#1;havoc check_~tmp~1#1;havoc check_~tmp~1#1; 1107#L550 assume ~st1~0 + ~st2~0 + ~st3~0 + ~st4~0 + ~st5~0 + ~st6~0 + ~st7~0 + ~st8~0 <= 1; 1106#L551 assume !(~r1~0 % 256 >= 8); 1104#L554 assume 0 == ~st1~0 + ~st2~0 + ~st3~0 + ~st4~0 + ~st5~0 + ~st6~0 + ~st7~0 + ~st8~0; 1105#L555 assume ~r1~0 % 256 < 8;check_~tmp~1#1 := 1; 1170#L550-1 check_#res#1 := check_~tmp~1#1; 1169#L570 main_#t~ret46#1 := check_#res#1;assume { :end_inline_check } true;main_~c1~0#1 := main_#t~ret46#1;havoc main_#t~ret46#1;assume { :begin_inline_assert } true;assert_#in~arg#1 := (if 0 == main_~c1~0#1 then 0 else 1);havoc assert_~arg#1;assert_~arg#1 := assert_#in~arg#1; 1168#L670 assume !(0 == assert_~arg#1 % 256); 1167#L665 assume { :end_inline_assert } true; 983#L632-2 [2021-12-15 17:23:15,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 17:23:15,302 INFO L85 PathProgramCache]: Analyzing trace with hash 354076320, now seen corresponding path program 3 times [2021-12-15 17:23:15,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 17:23:15,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780762971] [2021-12-15 17:23:15,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 17:23:15,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 17:23:15,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 17:23:15,329 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-15 17:23:15,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 17:23:15,358 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-15 17:23:15,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 17:23:15,359 INFO L85 PathProgramCache]: Analyzing trace with hash -149374161, now seen corresponding path program 1 times [2021-12-15 17:23:15,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 17:23:15,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176905285] [2021-12-15 17:23:15,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 17:23:15,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 17:23:15,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 17:23:15,368 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-15 17:23:15,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 17:23:15,379 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-15 17:23:15,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 17:23:15,380 INFO L85 PathProgramCache]: Analyzing trace with hash -969886864, now seen corresponding path program 1 times [2021-12-15 17:23:15,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 17:23:15,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310480810] [2021-12-15 17:23:15,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 17:23:15,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 17:23:15,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 17:23:15,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 17:23:15,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 17:23:15,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310480810] [2021-12-15 17:23:15,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310480810] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 17:23:15,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 17:23:15,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 17:23:15,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620406529] [2021-12-15 17:23:15,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 17:23:16,888 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.UnmodifiableTransFormula.removeSuperfluousVars(UnmodifiableTransFormula.java:212) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.finishConstruction(TransFormulaBuilder.java:273) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.getTrivialTransFormula(TransFormulaBuilder.java:285) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.LassoCheck.synthesize(LassoCheck.java:548) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.LassoCheck$LassoCheckResult.checkLoopTermination(LassoCheck.java:944) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.LassoCheck$LassoCheckResult.(LassoCheck.java:834) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.LassoCheck.(LassoCheck.java:252) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiCegarLoop.iterate(BuchiCegarLoop.java:457) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver.doTerminationAnalysis(BuchiAutomizerObserver.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver.finish(BuchiAutomizerObserver.java:397) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-15 17:23:16,891 INFO L158 Benchmark]: Toolchain (without parser) took 3928.21ms. Allocated memory was 88.1MB in the beginning and 130.0MB in the end (delta: 41.9MB). Free memory was 55.7MB in the beginning and 94.3MB in the end (delta: -38.7MB). Peak memory consumption was 54.5MB. Max. memory is 16.1GB. [2021-12-15 17:23:16,892 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 88.1MB. Free memory was 45.2MB in the beginning and 45.2MB in the end (delta: 84.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 17:23:16,892 INFO L158 Benchmark]: CACSL2BoogieTranslator took 340.51ms. Allocated memory was 88.1MB in the beginning and 107.0MB in the end (delta: 18.9MB). Free memory was 55.7MB in the beginning and 76.0MB in the end (delta: -20.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-15 17:23:16,893 INFO L158 Benchmark]: Boogie Procedure Inliner took 68.22ms. Allocated memory is still 107.0MB. Free memory was 76.0MB in the beginning and 72.8MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-15 17:23:16,893 INFO L158 Benchmark]: Boogie Preprocessor took 51.11ms. Allocated memory is still 107.0MB. Free memory was 72.8MB in the beginning and 70.1MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 17:23:16,894 INFO L158 Benchmark]: RCFGBuilder took 618.33ms. Allocated memory is still 107.0MB. Free memory was 70.1MB in the beginning and 80.8MB in the end (delta: -10.7MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2021-12-15 17:23:16,894 INFO L158 Benchmark]: BuchiAutomizer took 2841.14ms. Allocated memory was 107.0MB in the beginning and 130.0MB in the end (delta: 23.1MB). Free memory was 80.8MB in the beginning and 94.3MB in the end (delta: -13.5MB). Peak memory consumption was 61.5MB. Max. memory is 16.1GB. [2021-12-15 17:23:16,897 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 88.1MB. Free memory was 45.2MB in the beginning and 45.2MB in the end (delta: 84.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 340.51ms. Allocated memory was 88.1MB in the beginning and 107.0MB in the end (delta: 18.9MB). Free memory was 55.7MB in the beginning and 76.0MB in the end (delta: -20.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 68.22ms. Allocated memory is still 107.0MB. Free memory was 76.0MB in the beginning and 72.8MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 51.11ms. Allocated memory is still 107.0MB. Free memory was 72.8MB in the beginning and 70.1MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 618.33ms. Allocated memory is still 107.0MB. Free memory was 70.1MB in the beginning and 80.8MB in the end (delta: -10.7MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * BuchiAutomizer took 2841.14ms. Allocated memory was 107.0MB in the beginning and 130.0MB in the end (delta: 23.1MB). Free memory was 80.8MB in the beginning and 94.3MB in the end (delta: -13.5MB). Peak memory consumption was 61.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-15 17:23:16,944 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... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis No suitable file found in config dir /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config using search string *Termination*32bit*_Bitvector*.epf No suitable settings file found using Termination*32bit*_Bitvector ERROR: UNSUPPORTED PROPERTY Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable