./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.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-var-start-time.4.2.ufo.BOUNDED-8.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 c5be25d34b5f565c0e61b447a9da3cd9d228084b5ddd898e062981f46972caa8 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 17:22:46,669 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 17:22:46,671 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 17:22:46,713 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 17:22:46,714 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 17:22:46,716 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 17:22:46,717 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 17:22:46,719 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 17:22:46,721 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 17:22:46,725 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 17:22:46,725 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 17:22:46,726 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 17:22:46,727 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 17:22:46,728 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 17:22:46,730 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 17:22:46,732 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 17:22:46,733 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 17:22:46,733 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 17:22:46,735 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 17:22:46,739 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 17:22:46,740 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 17:22:46,741 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 17:22:46,742 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 17:22:46,743 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 17:22:46,747 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 17:22:46,747 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 17:22:46,748 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 17:22:46,749 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 17:22:46,749 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 17:22:46,750 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 17:22:46,750 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 17:22:46,750 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 17:22:46,752 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 17:22:46,752 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 17:22:46,753 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 17:22:46,753 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 17:22:46,754 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 17:22:46,754 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 17:22:46,754 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 17:22:46,755 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 17:22:46,755 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 17:22:46,757 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-12-15 17:22:46,783 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 17:22:46,783 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 17:22:46,784 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 17:22:46,784 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 17:22:46,785 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 17:22:46,785 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 17:22:46,785 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 17:22:46,785 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-12-15 17:22:46,786 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-12-15 17:22:46,786 INFO L138 SettingsManager]: * Use old map elimination=false [2021-12-15 17:22:46,786 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-12-15 17:22:46,786 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-12-15 17:22:46,787 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-12-15 17:22:46,787 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 17:22:46,787 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 17:22:46,787 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-15 17:22:46,787 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 17:22:46,788 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 17:22:46,788 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 17:22:46,788 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-12-15 17:22:46,788 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-12-15 17:22:46,788 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-12-15 17:22:46,788 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 17:22:46,788 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 17:22:46,789 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-12-15 17:22:46,789 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 17:22:46,789 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-12-15 17:22:46,789 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 17:22:46,789 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 17:22:46,789 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 17:22:46,789 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 17:22:46,790 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 17:22:46,790 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-12-15 17:22:46,790 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c5be25d34b5f565c0e61b447a9da3cd9d228084b5ddd898e062981f46972caa8 [2021-12-15 17:22:46,978 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 17:22:46,996 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 17:22:46,997 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 17:22:46,998 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 17:22:46,999 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 17:22:46,999 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c [2021-12-15 17:22:47,056 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d8dc4f69/b751e945d6fc4fe5a3e6592d6cacefc7/FLAG004ce2fab [2021-12-15 17:22:47,383 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 17:22:47,384 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c [2021-12-15 17:22:47,389 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d8dc4f69/b751e945d6fc4fe5a3e6592d6cacefc7/FLAG004ce2fab [2021-12-15 17:22:47,821 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d8dc4f69/b751e945d6fc4fe5a3e6592d6cacefc7 [2021-12-15 17:22:47,823 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 17:22:47,824 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 17:22:47,825 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 17:22:47,825 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 17:22:47,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 17:22:47,830 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 05:22:47" (1/1) ... [2021-12-15 17:22:47,831 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45f206f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:22:47, skipping insertion in model container [2021-12-15 17:22:47,831 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 05:22:47" (1/1) ... [2021-12-15 17:22:47,836 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 17:22:47,863 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 17:22:48,049 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-var-start-time.4.2.ufo.BOUNDED-8.pals.c[9280,9293] [2021-12-15 17:22:48,050 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 17:22:48,058 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 17:22:48,085 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-var-start-time.4.2.ufo.BOUNDED-8.pals.c[9280,9293] [2021-12-15 17:22:48,085 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 17:22:48,095 INFO L208 MainTranslator]: Completed translation [2021-12-15 17:22:48,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:22:48 WrapperNode [2021-12-15 17:22:48,096 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 17:22:48,097 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 17:22:48,097 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 17:22:48,097 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 17:22:48,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:22:48" (1/1) ... [2021-12-15 17:22:48,121 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:22:48" (1/1) ... [2021-12-15 17:22:48,144 INFO L137 Inliner]: procedures = 22, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 298 [2021-12-15 17:22:48,151 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 17:22:48,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 17:22:48,152 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 17:22:48,152 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 17:22:48,157 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:22:48" (1/1) ... [2021-12-15 17:22:48,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:22:48" (1/1) ... [2021-12-15 17:22:48,160 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:22:48" (1/1) ... [2021-12-15 17:22:48,173 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:22:48" (1/1) ... [2021-12-15 17:22:48,178 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:22:48" (1/1) ... [2021-12-15 17:22:48,182 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:22:48" (1/1) ... [2021-12-15 17:22:48,187 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:22:48" (1/1) ... [2021-12-15 17:22:48,202 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 17:22:48,203 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 17:22:48,203 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 17:22:48,203 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 17:22:48,204 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:22:48" (1/1) ... [2021-12-15 17:22:48,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-15 17:22:48,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 17:22:48,234 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 17:22:48,253 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 17:22:48,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 17:22:48,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 17:22:48,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 17:22:48,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 17:22:48,341 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 17:22:48,342 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 17:22:48,674 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 17:22:48,689 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 17:22:48,690 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 17:22:48,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 05:22:48 BoogieIcfgContainer [2021-12-15 17:22:48,695 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 17:22:48,696 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-12-15 17:22:48,696 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-12-15 17:22:48,698 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-12-15 17:22:48,699 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-15 17:22:48,699 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 15.12 05:22:47" (1/3) ... [2021-12-15 17:22:48,700 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@76c14603 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 15.12 05:22:48, skipping insertion in model container [2021-12-15 17:22:48,700 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-15 17:22:48,700 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:22:48" (2/3) ... [2021-12-15 17:22:48,700 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@76c14603 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 15.12 05:22:48, skipping insertion in model container [2021-12-15 17:22:48,701 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-15 17:22:48,701 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 05:22:48" (3/3) ... [2021-12-15 17:22:48,702 INFO L388 chiAutomizerObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c [2021-12-15 17:22:48,735 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-12-15 17:22:48,735 INFO L360 BuchiCegarLoop]: Hoare is false [2021-12-15 17:22:48,735 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-12-15 17:22:48,735 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-12-15 17:22:48,736 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-12-15 17:22:48,736 INFO L364 BuchiCegarLoop]: Difference is false [2021-12-15 17:22:48,736 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-12-15 17:22:48,736 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-12-15 17:22:48,747 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 96 states, 95 states have (on average 1.6842105263157894) internal successors, (160), 95 states have internal predecessors, (160), 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 17:22:48,762 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 62 [2021-12-15 17:22:48,762 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-15 17:22:48,762 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-15 17:22:48,767 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-15 17:22:48,767 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] [2021-12-15 17:22:48,767 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-12-15 17:22:48,768 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 96 states, 95 states have (on average 1.6842105263157894) internal successors, (160), 95 states have internal predecessors, (160), 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 17:22:48,772 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 62 [2021-12-15 17:22:48,772 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-15 17:22:48,772 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-15 17:22:48,773 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-15 17:22:48,773 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] [2021-12-15 17:22:48,778 INFO L791 eck$LassoCheckResult]: Stem: 71#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(49, 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;~alive1~0 := 0;~p2~0 := 0;~p2_old~0 := 0;~p2_new~0 := 0;~id2~0 := 0;~st2~0 := 0;~send2~0 := 0;~mode2~0 := 0;~alive2~0 := 0;~p3~0 := 0;~p3_old~0 := 0;~p3_new~0 := 0;~id3~0 := 0;~st3~0 := 0;~send3~0 := 0;~mode3~0 := 0;~alive3~0 := 0;~p4~0 := 0;~p4_old~0 := 0;~p4_new~0 := 0;~id4~0 := 0;~st4~0 := 0;~send4~0 := 0;~mode4~0 := 0;~alive4~0 := 0; 57#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet11#1, 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~ret32#1, main_#t~ret33#1, main_#t~post34#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~nondet11#1;havoc main_#t~nondet11#1;~id1~0 := main_#t~nondet12#1;havoc main_#t~nondet12#1;~st1~0 := main_#t~nondet13#1;havoc main_#t~nondet13#1;~send1~0 := main_#t~nondet14#1;havoc main_#t~nondet14#1;~mode1~0 := main_#t~nondet15#1;havoc main_#t~nondet15#1;~alive1~0 := 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;~alive2~0 := main_#t~nondet21#1;havoc main_#t~nondet21#1;~id3~0 := main_#t~nondet22#1;havoc main_#t~nondet22#1;~st3~0 := main_#t~nondet23#1;havoc main_#t~nondet23#1;~send3~0 := main_#t~nondet24#1;havoc main_#t~nondet24#1;~mode3~0 := main_#t~nondet25#1;havoc main_#t~nondet25#1;~alive3~0 := main_#t~nondet26#1;havoc main_#t~nondet26#1;~id4~0 := main_#t~nondet27#1;havoc main_#t~nondet27#1;~st4~0 := main_#t~nondet28#1;havoc main_#t~nondet28#1;~send4~0 := main_#t~nondet29#1;havoc main_#t~nondet29#1;~mode4~0 := main_#t~nondet30#1;havoc main_#t~nondet30#1;~alive4~0 := main_#t~nondet31#1;havoc main_#t~nondet31#1;assume { :begin_inline_init } true;havoc init_#res#1;havoc init_~tmp~0#1;havoc init_~tmp~0#1; 4#L198true assume !(0 == ~r1~0);init_~tmp~0#1 := 0; 33#L198-1true init_#res#1 := init_~tmp~0#1; 7#L295true main_#t~ret32#1 := init_#res#1;assume { :end_inline_init } true;main_~i2~0#1 := main_#t~ret32#1;havoc main_#t~ret32#1; 66#L347true assume !(0 == main_~i2~0#1); 93#L347-2true ~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;main_~i2~0#1 := 0; 56#L357-2true [2021-12-15 17:22:48,779 INFO L793 eck$LassoCheckResult]: Loop: 56#L357-2true assume !!(main_~i2~0#1 < 8);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; 96#L65true assume 0 != ~mode1~0 % 256;~r1~0 := (if (1 + ~r1~0) % 256 <= 127 then (1 + ~r1~0) % 256 else (1 + ~r1~0) % 256 - 256);node1_~m1~0#1 := ~p4_old~0;~p4_old~0 := ~nomsg~0; 20#L69true assume !(node1_~m1~0#1 != ~nomsg~0); 85#L69-1true ~mode1~0 := 0; 54#L65-2true assume { :end_inline_node1 } true;assume { :begin_inline_node2 } true;havoc node2_#t~ite5#1, node2_#t~ite6#1, node2_~m2~0#1;havoc node2_~m2~0#1;node2_~m2~0#1 := ~nomsg~0; 13#L97true assume 0 != ~mode2~0 % 256;node2_~m2~0#1 := ~p1_old~0;~p1_old~0 := ~nomsg~0; 78#L100true assume !(node2_~m2~0#1 != ~nomsg~0); 11#L100-1true ~mode2~0 := 0; 75#L97-2true assume { :end_inline_node2 } true;assume { :begin_inline_node3 } true;havoc node3_#t~ite7#1, node3_#t~ite8#1, node3_~m3~0#1;havoc node3_~m3~0#1;node3_~m3~0#1 := ~nomsg~0; 61#L131true assume 0 != ~mode3~0 % 256;node3_~m3~0#1 := ~p2_old~0;~p2_old~0 := ~nomsg~0; 74#L134true assume !(node3_~m3~0#1 != ~nomsg~0); 67#L134-1true ~mode3~0 := 0; 38#L131-2true assume { :end_inline_node3 } true;assume { :begin_inline_node4 } true;havoc node4_#t~ite9#1, node4_#t~ite10#1, node4_~m4~0#1;havoc node4_~m4~0#1;node4_~m4~0#1 := ~nomsg~0; 19#L165true assume 0 != ~mode4~0 % 256;node4_~m4~0#1 := ~p3_old~0;~p3_old~0 := ~nomsg~0; 6#L168true assume !(node4_~m4~0#1 != ~nomsg~0); 83#L168-1true ~mode4~0 := 0; 30#L165-2true assume { :end_inline_node4 } 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;assume { :begin_inline_check } true;havoc check_#res#1;havoc check_~tmp~1#1;havoc check_~tmp~1#1; 76#L303true assume !(~st1~0 + ~st2~0 + ~st3~0 + ~st4~0 <= 1);check_~tmp~1#1 := 0; 44#L303-1true check_#res#1 := check_~tmp~1#1; 62#L315true main_#t~ret33#1 := check_#res#1;assume { :end_inline_check } true;main_~c1~0#1 := main_#t~ret33#1;havoc main_#t~ret33#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; 94#L384true assume !(0 == assert_~arg#1 % 256); 50#L379true assume { :end_inline_assert } true;main_#t~post34#1 := main_~i2~0#1;main_~i2~0#1 := 1 + main_#t~post34#1;havoc main_#t~post34#1; 56#L357-2true [2021-12-15 17:22:48,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 17:22:48,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1938506578, now seen corresponding path program 1 times [2021-12-15 17:22:48,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 17:22:48,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661681550] [2021-12-15 17:22:48,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 17:22:48,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 17:22:48,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 17:22:48,960 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 17:22:48,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 17:22:48,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661681550] [2021-12-15 17:22:48,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661681550] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 17:22:48,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 17:22:48,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 17:22:48,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601330645] [2021-12-15 17:22:48,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 17:22:48,965 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-15 17:22:48,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 17:22:48,966 INFO L85 PathProgramCache]: Analyzing trace with hash -388024983, now seen corresponding path program 1 times [2021-12-15 17:22:48,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 17:22:48,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879703941] [2021-12-15 17:22:48,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 17:22:48,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 17:22:49,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 17:22:49,074 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 17:22:49,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 17:22:49,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879703941] [2021-12-15 17:22:49,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879703941] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 17:22:49,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 17:22:49,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 17:22:49,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667528527] [2021-12-15 17:22:49,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 17:22:49,076 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-15 17:22:49,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 17:22:49,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 17:22:49,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 17:22:49,098 INFO L87 Difference]: Start difference. First operand has 96 states, 95 states have (on average 1.6842105263157894) internal successors, (160), 95 states have internal predecessors, (160), 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 17:22:49,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 17:22:49,194 INFO L93 Difference]: Finished difference Result 161 states and 258 transitions. [2021-12-15 17:22:49,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 17:22:49,199 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 161 states and 258 transitions. [2021-12-15 17:22:49,206 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 61 [2021-12-15 17:22:49,210 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 161 states to 152 states and 226 transitions. [2021-12-15 17:22:49,211 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 152 [2021-12-15 17:22:49,212 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 152 [2021-12-15 17:22:49,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 152 states and 226 transitions. [2021-12-15 17:22:49,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-15 17:22:49,213 INFO L681 BuchiCegarLoop]: Abstraction has 152 states and 226 transitions. [2021-12-15 17:22:49,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states and 226 transitions. [2021-12-15 17:22:49,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 91. [2021-12-15 17:22:49,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 91 states have (on average 1.4065934065934067) internal successors, (128), 90 states have internal predecessors, (128), 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 17:22:49,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 128 transitions. [2021-12-15 17:22:49,234 INFO L704 BuchiCegarLoop]: Abstraction has 91 states and 128 transitions. [2021-12-15 17:22:49,234 INFO L587 BuchiCegarLoop]: Abstraction has 91 states and 128 transitions. [2021-12-15 17:22:49,234 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-12-15 17:22:49,234 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 91 states and 128 transitions. [2021-12-15 17:22:49,235 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 61 [2021-12-15 17:22:49,235 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-15 17:22:49,235 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-15 17:22:49,236 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] [2021-12-15 17:22:49,236 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] [2021-12-15 17:22:49,236 INFO L791 eck$LassoCheckResult]: Stem: 357#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(49, 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;~alive1~0 := 0;~p2~0 := 0;~p2_old~0 := 0;~p2_new~0 := 0;~id2~0 := 0;~st2~0 := 0;~send2~0 := 0;~mode2~0 := 0;~alive2~0 := 0;~p3~0 := 0;~p3_old~0 := 0;~p3_new~0 := 0;~id3~0 := 0;~st3~0 := 0;~send3~0 := 0;~mode3~0 := 0;~alive3~0 := 0;~p4~0 := 0;~p4_old~0 := 0;~p4_new~0 := 0;~id4~0 := 0;~st4~0 := 0;~send4~0 := 0;~mode4~0 := 0;~alive4~0 := 0; 350#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet11#1, 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~ret32#1, main_#t~ret33#1, main_#t~post34#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~nondet11#1;havoc main_#t~nondet11#1;~id1~0 := main_#t~nondet12#1;havoc main_#t~nondet12#1;~st1~0 := main_#t~nondet13#1;havoc main_#t~nondet13#1;~send1~0 := main_#t~nondet14#1;havoc main_#t~nondet14#1;~mode1~0 := main_#t~nondet15#1;havoc main_#t~nondet15#1;~alive1~0 := 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;~alive2~0 := main_#t~nondet21#1;havoc main_#t~nondet21#1;~id3~0 := main_#t~nondet22#1;havoc main_#t~nondet22#1;~st3~0 := main_#t~nondet23#1;havoc main_#t~nondet23#1;~send3~0 := main_#t~nondet24#1;havoc main_#t~nondet24#1;~mode3~0 := main_#t~nondet25#1;havoc main_#t~nondet25#1;~alive3~0 := main_#t~nondet26#1;havoc main_#t~nondet26#1;~id4~0 := main_#t~nondet27#1;havoc main_#t~nondet27#1;~st4~0 := main_#t~nondet28#1;havoc main_#t~nondet28#1;~send4~0 := main_#t~nondet29#1;havoc main_#t~nondet29#1;~mode4~0 := main_#t~nondet30#1;havoc main_#t~nondet30#1;~alive4~0 := main_#t~nondet31#1;havoc main_#t~nondet31#1;assume { :begin_inline_init } true;havoc init_#res#1;havoc init_~tmp~0#1;havoc init_~tmp~0#1; 275#L198 assume 0 == ~r1~0; 276#L199 assume ~alive1~0 % 256 + ~alive2~0 % 256 + ~alive3~0 % 256 + ~alive4~0 % 256 >= 1; 343#L200 assume ~id1~0 >= 0; 344#L201 assume 0 == ~st1~0; 319#L202 assume ~send1~0 == ~id1~0; 320#L203 assume 0 == ~mode1~0 % 256; 333#L204 assume ~id2~0 >= 0; 299#L205 assume 0 == ~st2~0; 300#L206 assume ~send2~0 == ~id2~0; 284#L207 assume 0 == ~mode2~0 % 256; 285#L208 assume ~id3~0 >= 0; 347#L209 assume 0 == ~st3~0; 301#L210 assume ~send3~0 == ~id3~0; 302#L211 assume 0 == ~mode3~0 % 256; 289#L212 assume ~id4~0 >= 0; 290#L213 assume 0 == ~st4~0; 361#L214 assume ~send4~0 == ~id4~0; 362#L215 assume 0 == ~mode4~0 % 256; 345#L216 assume ~id1~0 != ~id2~0; 321#L217 assume ~id1~0 != ~id3~0; 322#L218 assume ~id1~0 != ~id4~0; 351#L219 assume ~id2~0 != ~id3~0; 365#L220 assume ~id2~0 != ~id4~0; 315#L221 assume ~id3~0 != ~id4~0;init_~tmp~0#1 := 1; 316#L198-1 init_#res#1 := init_~tmp~0#1; 282#L295 main_#t~ret32#1 := init_#res#1;assume { :end_inline_init } true;main_~i2~0#1 := main_#t~ret32#1;havoc main_#t~ret32#1; 283#L347 assume !(0 == main_~i2~0#1); 356#L347-2 ~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;main_~i2~0#1 := 0; 342#L357-2 [2021-12-15 17:22:49,237 INFO L793 eck$LassoCheckResult]: Loop: 342#L357-2 assume !!(main_~i2~0#1 < 8);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; 349#L65 assume 0 != ~mode1~0 % 256;~r1~0 := (if (1 + ~r1~0) % 256 <= 127 then (1 + ~r1~0) % 256 else (1 + ~r1~0) % 256 - 256);node1_~m1~0#1 := ~p4_old~0;~p4_old~0 := ~nomsg~0; 307#L69 assume !(node1_~m1~0#1 != ~nomsg~0); 278#L69-1 ~mode1~0 := 0; 348#L65-2 assume { :end_inline_node1 } true;assume { :begin_inline_node2 } true;havoc node2_#t~ite5#1, node2_#t~ite6#1, node2_~m2~0#1;havoc node2_~m2~0#1;node2_~m2~0#1 := ~nomsg~0; 294#L97 assume 0 != ~mode2~0 % 256;node2_~m2~0#1 := ~p1_old~0;~p1_old~0 := ~nomsg~0; 296#L100 assume !(node2_~m2~0#1 != ~nomsg~0); 292#L100-1 ~mode2~0 := 0; 293#L97-2 assume { :end_inline_node2 } true;assume { :begin_inline_node3 } true;havoc node3_#t~ite7#1, node3_#t~ite8#1, node3_~m3~0#1;havoc node3_~m3~0#1;node3_~m3~0#1 := ~nomsg~0; 352#L131 assume 0 != ~mode3~0 % 256;node3_~m3~0#1 := ~p2_old~0;~p2_old~0 := ~nomsg~0; 353#L134 assume !(node3_~m3~0#1 != ~nomsg~0); 313#L134-1 ~mode3~0 := 0; 328#L131-2 assume { :end_inline_node3 } true;assume { :begin_inline_node4 } true;havoc node4_#t~ite9#1, node4_#t~ite10#1, node4_~m4~0#1;havoc node4_~m4~0#1;node4_~m4~0#1 := ~nomsg~0; 305#L165 assume 0 != ~mode4~0 % 256;node4_~m4~0#1 := ~p3_old~0;~p3_old~0 := ~nomsg~0; 279#L168 assume !(node4_~m4~0#1 != ~nomsg~0); 280#L168-1 ~mode4~0 := 0; 323#L165-2 assume { :end_inline_node4 } 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;assume { :begin_inline_check } true;havoc check_#res#1;havoc check_~tmp~1#1;havoc check_~tmp~1#1; 324#L303 assume !(~st1~0 + ~st2~0 + ~st3~0 + ~st4~0 <= 1);check_~tmp~1#1 := 0; 304#L303-1 check_#res#1 := check_~tmp~1#1; 339#L315 main_#t~ret33#1 := check_#res#1;assume { :end_inline_check } true;main_~c1~0#1 := main_#t~ret33#1;havoc main_#t~ret33#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; 354#L384 assume !(0 == assert_~arg#1 % 256); 341#L379 assume { :end_inline_assert } true;main_#t~post34#1 := main_~i2~0#1;main_~i2~0#1 := 1 + main_#t~post34#1;havoc main_#t~post34#1; 342#L357-2 [2021-12-15 17:22:49,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 17:22:49,237 INFO L85 PathProgramCache]: Analyzing trace with hash -805895157, now seen corresponding path program 1 times [2021-12-15 17:22:49,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 17:22:49,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971778192] [2021-12-15 17:22:49,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 17:22:49,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 17:22:49,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 17:22:49,257 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-15 17:22:49,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 17:22:49,304 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-15 17:22:49,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 17:22:49,307 INFO L85 PathProgramCache]: Analyzing trace with hash -388024983, now seen corresponding path program 2 times [2021-12-15 17:22:49,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 17:22:49,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325313534] [2021-12-15 17:22:49,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 17:22:49,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 17:22:49,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 17:22:49,378 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 17:22:49,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 17:22:49,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325313534] [2021-12-15 17:22:49,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325313534] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 17:22:49,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 17:22:49,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 17:22:49,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690871618] [2021-12-15 17:22:49,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 17:22:49,380 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-15 17:22:49,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 17:22:49,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 17:22:49,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 17:22:49,384 INFO L87 Difference]: Start difference. First operand 91 states and 128 transitions. cyclomatic complexity: 38 Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 17:22:49,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 17:22:49,429 INFO L93 Difference]: Finished difference Result 94 states and 130 transitions. [2021-12-15 17:22:49,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 17:22:49,430 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 94 states and 130 transitions. [2021-12-15 17:22:49,432 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 61 [2021-12-15 17:22:49,434 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 94 states to 91 states and 126 transitions. [2021-12-15 17:22:49,435 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 91 [2021-12-15 17:22:49,435 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 91 [2021-12-15 17:22:49,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 126 transitions. [2021-12-15 17:22:49,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-15 17:22:49,438 INFO L681 BuchiCegarLoop]: Abstraction has 91 states and 126 transitions. [2021-12-15 17:22:49,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states and 126 transitions. [2021-12-15 17:22:49,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-12-15 17:22:49,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 91 states have (on average 1.3846153846153846) internal successors, (126), 90 states have internal predecessors, (126), 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 17:22:49,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 126 transitions. [2021-12-15 17:22:49,447 INFO L704 BuchiCegarLoop]: Abstraction has 91 states and 126 transitions. [2021-12-15 17:22:49,447 INFO L587 BuchiCegarLoop]: Abstraction has 91 states and 126 transitions. [2021-12-15 17:22:49,447 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-12-15 17:22:49,447 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 91 states and 126 transitions. [2021-12-15 17:22:49,448 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 61 [2021-12-15 17:22:49,448 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-15 17:22:49,448 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-15 17:22:49,449 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] [2021-12-15 17:22:49,450 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] [2021-12-15 17:22:49,451 INFO L791 eck$LassoCheckResult]: Stem: 554#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(49, 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;~alive1~0 := 0;~p2~0 := 0;~p2_old~0 := 0;~p2_new~0 := 0;~id2~0 := 0;~st2~0 := 0;~send2~0 := 0;~mode2~0 := 0;~alive2~0 := 0;~p3~0 := 0;~p3_old~0 := 0;~p3_new~0 := 0;~id3~0 := 0;~st3~0 := 0;~send3~0 := 0;~mode3~0 := 0;~alive3~0 := 0;~p4~0 := 0;~p4_old~0 := 0;~p4_new~0 := 0;~id4~0 := 0;~st4~0 := 0;~send4~0 := 0;~mode4~0 := 0;~alive4~0 := 0; 547#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet11#1, 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~ret32#1, main_#t~ret33#1, main_#t~post34#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~nondet11#1;havoc main_#t~nondet11#1;~id1~0 := main_#t~nondet12#1;havoc main_#t~nondet12#1;~st1~0 := main_#t~nondet13#1;havoc main_#t~nondet13#1;~send1~0 := main_#t~nondet14#1;havoc main_#t~nondet14#1;~mode1~0 := main_#t~nondet15#1;havoc main_#t~nondet15#1;~alive1~0 := 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;~alive2~0 := main_#t~nondet21#1;havoc main_#t~nondet21#1;~id3~0 := main_#t~nondet22#1;havoc main_#t~nondet22#1;~st3~0 := main_#t~nondet23#1;havoc main_#t~nondet23#1;~send3~0 := main_#t~nondet24#1;havoc main_#t~nondet24#1;~mode3~0 := main_#t~nondet25#1;havoc main_#t~nondet25#1;~alive3~0 := main_#t~nondet26#1;havoc main_#t~nondet26#1;~id4~0 := main_#t~nondet27#1;havoc main_#t~nondet27#1;~st4~0 := main_#t~nondet28#1;havoc main_#t~nondet28#1;~send4~0 := main_#t~nondet29#1;havoc main_#t~nondet29#1;~mode4~0 := main_#t~nondet30#1;havoc main_#t~nondet30#1;~alive4~0 := main_#t~nondet31#1;havoc main_#t~nondet31#1;assume { :begin_inline_init } true;havoc init_#res#1;havoc init_~tmp~0#1;havoc init_~tmp~0#1; 477#L198 assume 0 == ~r1~0; 478#L199 assume ~alive1~0 % 256 + ~alive2~0 % 256 + ~alive3~0 % 256 + ~alive4~0 % 256 >= 1; 540#L200 assume ~id1~0 >= 0; 541#L201 assume 0 == ~st1~0; 516#L202 assume ~send1~0 == ~id1~0; 517#L203 assume 0 == ~mode1~0 % 256; 530#L204 assume ~id2~0 >= 0; 496#L205 assume 0 == ~st2~0; 497#L206 assume ~send2~0 == ~id2~0; 481#L207 assume 0 == ~mode2~0 % 256; 482#L208 assume ~id3~0 >= 0; 544#L209 assume 0 == ~st3~0; 498#L210 assume ~send3~0 == ~id3~0; 499#L211 assume 0 == ~mode3~0 % 256; 486#L212 assume ~id4~0 >= 0; 487#L213 assume 0 == ~st4~0; 558#L214 assume ~send4~0 == ~id4~0; 559#L215 assume 0 == ~mode4~0 % 256; 542#L216 assume ~id1~0 != ~id2~0; 518#L217 assume ~id1~0 != ~id3~0; 519#L218 assume ~id1~0 != ~id4~0; 548#L219 assume ~id2~0 != ~id3~0; 562#L220 assume ~id2~0 != ~id4~0; 512#L221 assume ~id3~0 != ~id4~0;init_~tmp~0#1 := 1; 513#L198-1 init_#res#1 := init_~tmp~0#1; 479#L295 main_#t~ret32#1 := init_#res#1;assume { :end_inline_init } true;main_~i2~0#1 := main_#t~ret32#1;havoc main_#t~ret32#1; 480#L347 assume !(0 == main_~i2~0#1); 553#L347-2 ~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;main_~i2~0#1 := 0; 539#L357-2 [2021-12-15 17:22:49,451 INFO L793 eck$LassoCheckResult]: Loop: 539#L357-2 assume !!(main_~i2~0#1 < 8);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; 546#L65 assume 0 != ~mode1~0 % 256;~r1~0 := (if (1 + ~r1~0) % 256 <= 127 then (1 + ~r1~0) % 256 else (1 + ~r1~0) % 256 - 256);node1_~m1~0#1 := ~p4_old~0;~p4_old~0 := ~nomsg~0; 504#L69 assume !(node1_~m1~0#1 != ~nomsg~0); 473#L69-1 ~mode1~0 := 0; 545#L65-2 assume { :end_inline_node1 } true;assume { :begin_inline_node2 } true;havoc node2_#t~ite5#1, node2_#t~ite6#1, node2_~m2~0#1;havoc node2_~m2~0#1;node2_~m2~0#1 := ~nomsg~0; 491#L97 assume 0 != ~mode2~0 % 256;node2_~m2~0#1 := ~p1_old~0;~p1_old~0 := ~nomsg~0; 493#L100 assume !(node2_~m2~0#1 != ~nomsg~0); 489#L100-1 ~mode2~0 := 0; 490#L97-2 assume { :end_inline_node2 } true;assume { :begin_inline_node3 } true;havoc node3_#t~ite7#1, node3_#t~ite8#1, node3_~m3~0#1;havoc node3_~m3~0#1;node3_~m3~0#1 := ~nomsg~0; 549#L131 assume 0 != ~mode3~0 % 256;node3_~m3~0#1 := ~p2_old~0;~p2_old~0 := ~nomsg~0; 550#L134 assume !(node3_~m3~0#1 != ~nomsg~0); 510#L134-1 ~mode3~0 := 0; 525#L131-2 assume { :end_inline_node3 } true;assume { :begin_inline_node4 } true;havoc node4_#t~ite9#1, node4_#t~ite10#1, node4_~m4~0#1;havoc node4_~m4~0#1;node4_~m4~0#1 := ~nomsg~0; 502#L165 assume 0 != ~mode4~0 % 256;node4_~m4~0#1 := ~p3_old~0;~p3_old~0 := ~nomsg~0; 474#L168 assume !(node4_~m4~0#1 != ~nomsg~0); 475#L168-1 ~mode4~0 := 0; 520#L165-2 assume { :end_inline_node4 } 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;assume { :begin_inline_check } true;havoc check_#res#1;havoc check_~tmp~1#1;havoc check_~tmp~1#1; 521#L303 assume ~st1~0 + ~st2~0 + ~st3~0 + ~st4~0 <= 1; 536#L304 assume ~r1~0 < 4;check_~tmp~1#1 := 1; 501#L303-1 check_#res#1 := check_~tmp~1#1; 537#L315 main_#t~ret33#1 := check_#res#1;assume { :end_inline_check } true;main_~c1~0#1 := main_#t~ret33#1;havoc main_#t~ret33#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; 551#L384 assume !(0 == assert_~arg#1 % 256); 538#L379 assume { :end_inline_assert } true;main_#t~post34#1 := main_~i2~0#1;main_~i2~0#1 := 1 + main_#t~post34#1;havoc main_#t~post34#1; 539#L357-2 [2021-12-15 17:22:49,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 17:22:49,452 INFO L85 PathProgramCache]: Analyzing trace with hash -805895157, now seen corresponding path program 2 times [2021-12-15 17:22:49,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 17:22:49,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88844847] [2021-12-15 17:22:49,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 17:22:49,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 17:22:49,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 17:22:49,483 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-15 17:22:49,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 17:22:49,504 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-15 17:22:49,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 17:22:49,509 INFO L85 PathProgramCache]: Analyzing trace with hash 472800243, now seen corresponding path program 1 times [2021-12-15 17:22:49,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 17:22:49,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077892806] [2021-12-15 17:22:49,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 17:22:49,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 17:22:49,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 17:22:49,530 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-15 17:22:49,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 17:22:49,550 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-15 17:22:49,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 17:22:49,551 INFO L85 PathProgramCache]: Analyzing trace with hash 614624425, now seen corresponding path program 1 times [2021-12-15 17:22:49,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 17:22:49,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684702661] [2021-12-15 17:22:49,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 17:22:49,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 17:22:49,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 17:22:49,589 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 17:22:49,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 17:22:49,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684702661] [2021-12-15 17:22:49,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684702661] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 17:22:49,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 17:22:49,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 17:22:49,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283251796] [2021-12-15 17:22:49,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 17:22:50,198 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 17:22:50,201 INFO L158 Benchmark]: Toolchain (without parser) took 2376.69ms. Allocated memory was 83.9MB in the beginning and 123.7MB in the end (delta: 39.8MB). Free memory was 51.3MB in the beginning and 79.9MB in the end (delta: -28.6MB). Peak memory consumption was 56.0MB. Max. memory is 16.1GB. [2021-12-15 17:22:50,201 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 83.9MB. Free memory is still 43.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 17:22:50,202 INFO L158 Benchmark]: CACSL2BoogieTranslator took 271.71ms. Allocated memory was 83.9MB in the beginning and 123.7MB in the end (delta: 39.8MB). Free memory was 51.3MB in the beginning and 96.4MB in the end (delta: -45.2MB). Peak memory consumption was 9.6MB. Max. memory is 16.1GB. [2021-12-15 17:22:50,202 INFO L158 Benchmark]: Boogie Procedure Inliner took 53.91ms. Allocated memory is still 123.7MB. Free memory was 96.4MB in the beginning and 93.7MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 17:22:50,203 INFO L158 Benchmark]: Boogie Preprocessor took 51.09ms. Allocated memory is still 123.7MB. Free memory was 93.7MB in the beginning and 92.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 17:22:50,203 INFO L158 Benchmark]: RCFGBuilder took 491.82ms. Allocated memory is still 123.7MB. Free memory was 92.2MB in the beginning and 73.4MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2021-12-15 17:22:50,203 INFO L158 Benchmark]: BuchiAutomizer took 1504.36ms. Allocated memory is still 123.7MB. Free memory was 73.4MB in the beginning and 79.9MB in the end (delta: -6.5MB). Peak memory consumption was 38.0MB. Max. memory is 16.1GB. [2021-12-15 17:22:50,205 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 83.9MB. Free memory is still 43.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 271.71ms. Allocated memory was 83.9MB in the beginning and 123.7MB in the end (delta: 39.8MB). Free memory was 51.3MB in the beginning and 96.4MB in the end (delta: -45.2MB). Peak memory consumption was 9.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 53.91ms. Allocated memory is still 123.7MB. Free memory was 96.4MB in the beginning and 93.7MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 51.09ms. Allocated memory is still 123.7MB. Free memory was 93.7MB in the beginning and 92.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 491.82ms. Allocated memory is still 123.7MB. Free memory was 92.2MB in the beginning and 73.4MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * BuchiAutomizer took 1504.36ms. Allocated memory is still 123.7MB. Free memory was 73.4MB in the beginning and 79.9MB in the end (delta: -6.5MB). Peak memory consumption was 38.0MB. 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 17:22:50,269 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